Buick OBD2 codes
Codes where we have reviewed, vehicle-specific evidence for this make.
Buick's notes come from GM bulletins shared with Chevrolet and GMC: cam timing codes on V6 models from timing chain stretch or a spun cam reluctor, and EVAP codes on recent small SUVs. Most point to a specific part or check, so reading the bulletin first can save buying the wrong parts.
B0013 with a Service Air Bag message on some GM sedans
GM bulletin PIC-4871A covers a Service Air Bag message with the SIR light and several airbag codes, including B0013, on 2006 to 2008 Buick Lucerne and Cadillac DTS cars. The NHTSA summary we read does not give the repair. This is an airbag system, so have it inspected by a qualified shop rather than repaired at home. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.
B0022 from high resistance at the belt pretensioner connector
An owner complaint on a 2014 Enclave quotes a dealer finding of B0022 with seat belt pretensioner resistance too high, and says the dealer used dielectric grease on the connector. The seat belt pretensioner is part of the restraint system, so have it inspected by a qualified shop and do not work on the connector yourself. The source is an owner complaint filed with NHTSA, so this is owner-reported vehicle data and not confirmed by a bulletin.
B0041 as a left front driver seat open deployment loop
Buick bulletin 050802 describes B0041 on 2000 to 2002 Buick models as a left front driver seat open deployment loop, and the same bulletin covers an option configuration error. We only read the NHTSA summary, not the bulletin itself. This is an airbag (SIR) circuit, so have it inspected by a qualified shop rather than repairing it yourself. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.
B0074 from a failed front passenger presence sensor
GM bulletin 16-NA-145 covers a service airbag light and a passenger airbag status of OFF on the 2012 to 2016 Buick Verano, with B0074, and the repair is a new front passenger presence sensor. This is an airbag fault, so have it inspected by a dealer or qualified shop. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.
C0035 behind an ABS or Stabilitrak warning
GM bulletin 3460D lists C0035 among the brake control module codes behind an ABS light on some GM trucks, and GM 16-NA-248 replaces a wheel speed sensor for intermittent Stabilitrak, traction and AWD disabled messages on some GM SUVs. We only have the NHTSA summaries. ABS and stability control are safety systems, so have the vehicle inspected rather than attempting repairs yourself. We have not confirmed the bulletins are still current, so this is labelled vehicle data rather than confirmed by bulletin.
C0050 with the ABS light on rear wheel speed sensor circuits
GM bulletins summarised by NHTSA tie C0050 to the ABS light with rear wheel speed sensor circuits, connectors, debris on the tone ring or module reprogramming. Row notes mention oil on a rear sensor and a wire pulling out of a connector on some vans. This is a brake system, so have it inspected by a qualified shop. We read only the NHTSA summaries. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.
C0186 and C0287 listed with a service stability light
A GM bulletin lists C0186 and C0287 among several codes that come with a service stability light on a 2006 mid-size SUV family. Only the NHTSA summary was read, and it lists the codes without a fix. The stability system is safety-critical, so have it inspected by a qualified shop. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.
C0186 with a Service StabiliTrak message
GM bulletin 4698 lists C0186 with a Service StabiliTrak message on the 2006 to 2008 Cadillac DTS and Buick Lucerne. The NHTSA summary lists the codes only and gives no cause, so there is no confirmed fix to point to. Have the stability and brake system inspected. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.
C0186 and C0287 with the airbag readiness light on
GM bulletin PI1525A pairs C0186 and C0287 with an airbag code and the airbag readiness light on 2014 to 2015 Regal and Malibu cars. It is a diagnostic tips bulletin and the summary we read does not state a cause. Because the airbag light is on, have the car inspected by a qualified shop. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.
C0196 with a Service Stabilitrak message
GM bulletin 4520 lists C0196 together with other stability codes behind a Service Stabilitrak message on the 2007 Buick Lucerne. We only read the NHTSA summary, so the repair is not known. This is a stability and braking system, so have it inspected rather than repairing it yourself. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.
C0265 with other brake module codes and lost communication
A GM bulletin ties C0265 to an ABS light and lost communication with the brake module on 1999 to 2006 full-size trucks and SUVs. A companion record says the fix is to reground the EBCM ground. The brake system is safety-critical, so have it inspected by a qualified shop. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.
C0550 from the transfer case control module
GM bulletin 03-04-21-006 covers a service 4WD light and an inoperative 4WD system with no communication with the transfer case control module, with C0550 set. The bulletin says the transfer case control module sets this code on these 2004 4WD SUVs. We only read the NHTSA summary. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.
C056D from an internal power steering module failure
An owner complaint on a 2016 Encore quotes a dealer invoice naming internal failure of the power steering module for C056D. The invoice says the column with module was replaced and programmed. Steering is safety-critical, so have it inspected by a qualified shop. The source is an owner complaint filed with NHTSA, so this is owner-reported vehicle data and not confirmed by a bulletin.
C0710 after a steering wheel position sensor replacement
GM bulletin 3936 covers C0710 and unwanted Stabilitrak activity after the steering wheel position sensor was replaced on the 2007 Buick LaCrosse. We only read the NHTSA summary, so the repair steps are not known to us. Steering and stability control are safety-critical, so have the vehicle inspected by a qualified shop. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.
C1233 from a worn front wheel bearing
GM bulletin 032503 covers front wheel bearing replacement when the ABS, traction control or service engine soon light is on with front wheel speed sensor codes, including C1233, on 2001 to 2003 models. It lists several Chevrolet, Buick, Pontiac and Oldsmobile models. We read only the NHTSA summary. ABS is a safety system, so have it inspected by a qualified shop. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.
P0008 from timing chain stretch on the 3.6L V6
GM bulletin 12-06-01-009F ties P0008 on the 2007 to 2012 3.6L High Feature V6 to a stretched timing chain and supplies a chain kit. GM says the cam actuators and sprockets normally do not need replacing for this, so check the oil level and condition first, then have the chain measured. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.
P0009 from timing chain wear on the 3.6L V6
GM bulletin 12-06-01-009C is a revision of the High Feature V6 timing chain kit and chain guide bulletin, and it lists P0009 among its codes. The vehicle note applies it to the 2007 to 2012 Buick LaCrosse with the 3.6L V6, and the bulletin also names the Enclave and Allure. Check the oil level and condition first, then have the timing chain checked before buying cam parts. Only the NHTSA summary was read, not the bulletin itself. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.
P0016 and P0017 from timing chain stretch on the 3.6L V6
GM bulletin 12-06-01-009F ties P0016 and P0017 on the 3.6L V6 to a stretched timing chain and supplies a chain kit. GM says the cam actuators and sprockets normally do not need replacing for this, so the chain should be measured before cam parts are bought. Check the oil level and condition first. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.
P0016 or P0017 with correct timing marks: check the cam reluctor
GM preliminary information PIP4548E says that if P0016 or P0017 sets but the timing marks line up, the camshaft reluctor may have spun on the camshaft, in which case the camshaft is replaced. It is a diagnostic lead rather than a recall, and the record we read did not state which engines it covers.
P0024 from a sticking exhaust cam actuator solenoid valve
GM special coverage 16115 says P0024 on the 2014 Impala and LaCrosse can come from a sticking exhaust camshaft position actuator solenoid valve, and dealers replace the valve at no charge. Check eligibility with a dealer before paying for the repair. We have not confirmed the coverage is still current, so this is labelled vehicle data rather than confirmed by bulletin.
P0036 with wiring chafed on the A/C hose coupling
GM bulletin PIT5336 lists P0036 among oxygen sensor heater and sensor codes on the 2013 to 2015 Enclave, Traverse and Acadia. It points to engine harness wires to the bank 1 oxygen sensor that are chafed on the A/C hose coupling, and to a possible open Emission 1 fuse. Related GM summaries for some older models mention the powertrain relay, or give no repair at all, and those older entries need testing to confirm. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.
P0089 stored only in history
GM bulletin PIP5860 covers P0089 stored in history on the 2020 to 2022 Encore GX and 2021 to 2022 Trailblazer. GM says not to replace fuel system parts unless the code is active and the published diagnostics are complete. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.
P0112 named in a Buick bulletin on reduced engine power
Buick bulletin 3192 covers a reduced engine power message or a check engine light with any combination of a list of codes that includes P0112 on the 2004 Rainier. Only the NHTSA summary was read, and it does not give the repair. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.
P0221 with reduced engine power
GM bulletin 050604032 covers reduced engine power with P0221 and several other throttle related codes on the 2004 to 2005 Rendezvous. We only read the NHTSA summary, so check the throttle body and its wiring first. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.
P0229 in extreme cold on LSY engines
Buick bulletin 22-NA-079 covers installing a cover for poor engine performance in extremely cold weather on LSY engines, with charge air cooler icing and a lit check engine light with P0229. Only the NHTSA summary was read, not the full bulletin. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.
Diagnosing P0265 together with a misfire code
An NHTSA bulletin summary (record 10083141) covers the diagnosis of a cylinder injector circuit code, including P0265, together with the general misfire code. Our notes cover some 2016 to 2017 GM models. We only read the cached summary, not the bulletin itself, so the cause and any fix are not known to us. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.
P0336 corrected by an ECM reprogram on the 2017 LaCrosse
GM bulletin 17-NA-156 says P0336 on the 2017 Buick LaCrosse and Cadillac XT5 is corrected by reprogramming the ECM. Ask a dealer to check for the software update before replacing the crankshaft sensor. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.
P0442 from a canister weld leak
GM bulletin 22-NA-217 links P0442 on some 2021 and 2022 small SUVs to a weld leak in the purge canister, found by smoke testing the canister. The bulletin is published on NHTSA, but we have not confirmed it is still current, so this is labelled vehicle data rather than confirmed by bulletin.
P0496 from purge solenoid O-ring damage
GM preliminary information PIP6037A links P0496 on recent small SUVs to possible damage to the purge solenoid O-ring, after the purge hoses have been checked. The bulletin is published on NHTSA, but we have not confirmed it is still current, so this is labelled vehicle data rather than confirmed by bulletin.
P04FB from condensation freezing in the crankcase pressure sensor
GM TechLink bulletin PIP5841 names P04FB as a crankcase ventilation hose connection pressure sensor performance fault on the 2.0L (RPO LSY) in some 2019 to 2022 GM models. GM says moisture can freeze in the sensor assembly in freezing weather. Its repair is to remove and inspect the PCV and crankcase pressure sensor and hose assembly, let frozen moisture thaw and drain, remove residual condensation, clear codes and re-evaluate. GM TechLink was read directly, but we have not confirmed it is still current, so this is labelled vehicle data rather than confirmed by bulletin.
P0506 from interference on the crank sensor circuit
GM bulletin 17-NA-317 says low idle, stalling after auto start, transmission shudder and reduced power with P0506 and cam timing codes on the 2018 Enclave and Traverse come from interference on the crankshaft position sensor circuit. The fix is to replace the crank sensor section of the engine harness, so check the harness before the sensor or cam parts. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.
P050D with a rough idle on cold starts
GM bulletin 24-NA-244 programs the engine computer with the latest software to correct a rough idle on cold starts with P050D on 2024 to 2025 Traverse and Acadia and the 2025 Enclave. Ask a dealer whether the update has been done before other repairs. GM also says that if injectors are replaced, they must be replaced as a matched set. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.
P0550 with a flashing 4WD switch on the Rainier
Buick bulletin 040421004 covers flashing 4WD switch indicator lights and inoperative 4WD with P0550 set on the 2004 to 2005 Rainier. The summary names one of the codes as a 4WD related code and does not give the repair. We have only read the NHTSA summary and have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.
P0620 with no start or a low voltmeter reading
GM bulletin 000604055 describes a no-start or intermittent start, a voltmeter reading in the low red zone or a check charge system message, with P0620 possibly set, on the 2000 to 2001 LeSabre. The summary does not give the repair. Only the NHTSA summary was read, not the full bulletin. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.
P062F with highway stalling and no start without a jump
A 2012 LaCrosse owner complaint to NHTSA reports stalling on the highway, then no start without a jump, with the check engine and traction control lights and P062F. GM bulletin 05-06-04-060A is noted for this family of control module codes on the LaCrosse, but its currency is not verified. The source is an owner report to NHTSA, not a confirmed pattern.
P0650 set after PCM replacement
GM bulletin 01584 covers P0650 set after powertrain control module replacement, listed here for the 2001 to 2002 Century and Regal. Only the NHTSA summary was read, not the full bulletin. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.
P06DE from a stuck oil pump, 2020 Encore
GM service update A202302140 covers an engine oil pump stuck by foreign material with P06DE on the 2020 Buick Encore, and dealers run an oil pump screening test. We only read the NHTSA summary. Check the oil level and condition first. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.
P0712 from transmission wiring harnesses
GM bulletin SB-06-06-04-021A covers a check engine light, no start or no crank, and loss of PRNDL backlighting with several transmission codes including P0712 on the 2006 to 2009 Buick Lucerne. It says to repair and re-route the transmission wiring harnesses. We read only the NHTSA summary, not the full bulletin. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.
P0742 from a sticking torque converter clutch
GM preliminary information PI0999 covers a lit check engine light, a sticking torque converter clutch and an engine shudder when stopping, with P0742 set, on some GM SUVs. We only have the NHTSA summary, not the bulletin itself. Pay attention to a shudder as the vehicle comes to a stop. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.
P0746 from out-of-round snap rings
GM bulletin PIP5974E ties P0746 to out-of-round snap rings in the transmission on the 2024 Enclave and 2024 to 2025 Encore GX. We only have the bulletin summary, so check the full procedure with a dealer before parts are replaced. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.
P0746 with a vehicle that will not move in gear
GM bulletin PIE0720A documents a condition where the vehicle will not move in Drive, Neutral or Reverse with P0746 on the 2018 to 2021 Enclave and 2020 to 2021 Encore. The summary lists it as an engineering information closure and does not name a fix. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.
P0843 with a harsh shift into third or fifth
GM bulletin PI0179 covers a harsh shift, typically into third or fifth gear, on 2010 vehicles with a 6T70 or 6T75 transmission built between 4/1/10 and 5/8/10. A technician may find P0843 stored in the TCM as active or history. Only the NHTSA summary was read. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.
P0989 and the transmission fluid pressure switch check
GM bulletin 070730015 gives information on a transmission fluid pressure switch check for false codes, including P0989, on 6T70, 6T75, 6L50, 6L80 or 6L90 automatics. The vehicle notes list some Saturn, Buick and Cadillac models, with an owner reporting a pressure sensor repair. The bulletin PDF was not read, so the procedure is unknown. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.
P1101 from the wrong air cleaner housing
GM bulletin PIP5240F says P1101 on some 2013 to 2019 GM small crossovers can come from an air cleaner housing that is not the right one for the engine, and the housing is replaced. Other GM bulletins on these models cover a whistle at start-up and oil leaks with the same code. Inspect the air cleaner housing and intake ducting first. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.
P1101 with reduced engine power from a charge air cooler O-ring
GM bulletin PIP5402E links Reduced Engine Power with P1101 on some 2013 to 2019 GM turbo models to a damaged O-ring at the charge air cooler coupler. Check the charge air cooler coupler and O-ring for damage or leaks first. Other GM bulletins on the Malibu also mention this code for a crankshaft oil leak. We have not confirmed the bulletins are still current, so this is labelled vehicle data rather than confirmed by bulletin.
P1101 from loose air duct clamps on the Verano
GM bulletin PI0931 says P1101 on the 2013 Buick Verano, often with lean or airflow codes, can come from loose air duct clamps. Inspect and tighten the intake duct clamps before replacing any sensor. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.
P129F from a failed fuel pump driver control module
GM bulletin 24-NA-139 replaces the fuel pump driver control module for P129F on some 2021 to 2023 GM models, with crank no start, stalling, loss of power or an erratic fuel gauge. GM also opened an engineering inquiry on some 2022 models. Check for other fuel pump codes and a dead or erratic fuel gauge before replacing the pump itself. We have not confirmed the bulletins are still current, so this is labelled vehicle data rather than confirmed by bulletin.
P1682 with battery draw or no start
GM bulletin PIT4649B covers the Service Engine Soon light with P1682, battery draw or no start on some 2007 to 2013 GM crossovers. Our notes for later models point to arcing or corrosion at the fuse block. Check the battery and look at the fuse block for heat marks or corrosion first. We have not confirmed the bulletins are still current, so this is labelled vehicle data rather than confirmed by bulletin.
P1811 with slips, harsh shifts and shudder on 1997 to 2002 GM front-drive cars
GM 00-07-30-002B covers slipping, harsh shifts and shudder with P1811 on 1997 to 2002 Buick, Chevrolet, Oldsmobile and Pontiac front-drive models. An NHTSA complaint quotes it as directing replacement of the pressure control solenoid valve assembly. Ask a shop to test that solenoid before replacing the transmission. We only read the NHTSA summary, not the full bulletin. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.
P182E and the circuit and system verification steps
GM bulletin 17-NA-084 covers a check engine light with P182E on 2009 to 2018 Buick, Cadillac, Chevrolet and GMC models. It gives a procedure to complete the circuit and system verification steps. Only the NHTSA summary was read. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.
P2138 and reduced power from the pedal sensor connection
GM special coverage N182188250 says an interrupted accelerator pedal sensor connection on some GM models, including the 2016 to 2018 Malibu, 2017 to 2018 LaCrosse and 2018 Regal, puts the car in reduced engine power and sets P2138 while the pedal still works. Dealers replace the pedal assembly as needed and repair the engine harness on some Malibu engines, so check eligibility with a dealer before paying for the repair. We have not confirmed the coverage is still current, so this is labelled vehicle data rather than confirmed by bulletin.
P2227 with the check engine light on
GM bulletin PI1445 is a preliminary information bulletin for the check engine light with P2227 on 2013 to 2015 XTS, Impala, Camaro and LaCrosse models. The NHTSA summary does not state the cause or the repair, and only the summary was read. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.
P228C returning after a pump replacement with E85 use
GM bulletin PIP5385 covers reduced power that clears after a key cycle, with P228C current or in history, on 2011 to 2016 GM 3.0L and 3.6L models that already had the high-pressure pump replaced and use E85. GM says to check a fuel sample for contamination, compare actual and desired pressure, and check the check valve in the pump inlet hose for restriction. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.
P2714 on the VT40 CVT
GM bulletin PIP5819B gives inspection and repair steps for P2714 on the VT40 CVT in the 2020 to 2023 Buick Encore GX. Check the CVT fluid level first, then ask a dealer about the bulletin before replacing the transmission. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.
P2714 and missing gears from a pressure control solenoid
GM bulletin PI-1131 ties missing gears with P2714 and other transmission codes on the 2011 LaCrosse and Regal to a pressure control solenoid that has stopped working. Ask a dealer for the bulletin details before the transmission is replaced. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.
P2723 with missing gears from a pressure control solenoid
GM bulletin PI-1131 covers missing gears and several pressure control solenoid codes, including P2723, on some 2011 GM vehicles. It says the cause may be a non-functioning pressure control solenoid. Check the transmission fluid level and condition first. Only the NHTSA summary was read, not the bulletin itself. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.
P2723 on the 6T70 and 6T75 automatics
GM TSB 07-07-30-019 covers the 6T70 and 6T75 transmissions with a check engine light, poor performance and codes including P2723 on some GM SUVs. It concerns diagnosis and speed sensor replacement. Check the transmission speed sensors as part of the diagnosis. We only have the NHTSA summary. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.
P2817 from a damaged turbine shaft seal
GM preliminary information bulletin PIP6005 says a damaged transmission turbine shaft seal can cause P2817 on the 2024 Acadia and Traverse and the 2025 Enclave. The summary we read is from NHTSA only, not the full bulletin. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.
U0121 stored during a scan that needs no parts
GM bulletin PIC-5652-B says the multi-axis acceleration sensor module on 2013 Malibu, Regal and LaCrosse models can store U0121 during a code check, and no parts need replacing for it. If there are no other symptoms, ask a dealer about the bulletin before buying modules. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.
U0131 with an intermittent Service Power Steering message
GM bulletin PIC-5651 covers an intermittent Service Power Steering message with U0131 on the 2011 to 2012 LaCrosse and Regal. Steering faults should be inspected by a dealer or qualified technician, not repaired at home. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.
U0415 from wheel speed sensors damaged by moisture
GM bulletin 16-NA-248 links intermittent StabiliTrak, Traction and AWD Disabled messages with U0415 and wheel speed sensor codes on the 2016 Envision to wheel speed sensors shorting inside from moisture, and replaces the sensor. These sensors feed the ABS and stability systems, so have them inspected rather than repaired at home. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.
U0415 with a Steering Assist Is Reduced message
GM bulletin 19-NA-182 gives repair information for a "Steering Assist Is Reduced" message with U0415 on the 2013 to 2017 LaCrosse and Regal. Steering faults should be inspected by a dealer or qualified technician, not repaired at home. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.
P0017: Crankshaft and exhaust camshaft positions do not agree (bank 1, sensor B)
- Enclave 2008–2012 · Supported by vehicle data · 1 bulletin
- LaCrosse 2007–2012 · Supported by vehicle data · 1 bulletin
- Regal 2011–2016 · Supported by vehicle data · 1 bulletin
- Verano 2013–2016 · Supported by vehicle data · 1 bulletin
B0013: Driver steering wheel air bag, stage 2 firing circuit fault
- Lucerne 2006–2008 · Supported by vehicle data · 1 bulletin
B0022: Front seat belt pretensioner circuit fault (varies by maker)
- Enclave 2014 · Supported by vehicle data
B0041: Airbag deployment loop open, left front (driver-side) side airbag circuit (Chevrolet)
- All models 2000–2002 · Supported by vehicle data · 1 bulletin
B0074: Passenger presence sensor circuit fault
- Verano 2012–2016 · Supported by vehicle data · 1 bulletin
C0035: Left front wheel speed sensor circuit fault (GM)
- Envision 2016 · Supported by vehicle data · 1 bulletin
C0050: Right rear wheel speed sensor circuit fault (GM)
- Enclave 2008–2017 · Supported by vehicle data · 2 bulletins
C0186: Sideways (lateral) acceleration sensor signal faulty or not believable
- Lucerne 2006–2008 · Supported by vehicle data · 1 bulletin
- Rainier 2006 · Supported by vehicle data · 1 bulletin
- Regal 2014–2015 · Supported by vehicle data · 1 bulletin
C0196: Stability system sees a sensor or motion fault (GM)
- Lucerne 2007 · Supported by vehicle data · 1 bulletin
C0265: ABS computer reports a fault in its relay circuit
- Rainier 2004–2005 · Supported by vehicle data · 1 bulletin
C0287: Stability computer flags a fault in a motion-sensing signal circuit
- Rainier 2006 · Supported by vehicle data · 1 bulletin
- Regal 2014–2015 · Supported by vehicle data · 1 bulletin
C0550: A chassis control module reports an internal fault
- Rainier 2004 · Supported by vehicle data · 1 bulletin
C056D: A control module reports an internal hardware fault
- Encore 2016 · Supported by vehicle data
C0710: Steering wheel position sensor signal fault (GM)
- LaCrosse 2007 · Supported by vehicle data · 1 bulletin
C1233: On Chevrolet and Buick, right front wheel speed sensor circuit open or shorted
- Century 2001–2003 · Supported by vehicle data · 1 bulletin
- Regal 2001–2003 · Supported by vehicle data · 1 bulletin
P0008: Engine position system performance, bank 1: the crankshaft-to-camshaft timing relationship has drifted out of range
- All models 2007–2012 · Supported by vehicle data
P0009: Engine position system performance, bank 2: the crankshaft and bank 2 camshaft timing no longer agree
- LaCrosse 2007–2012 · Supported by vehicle data · 1 bulletin
P0016: Crankshaft and intake camshaft positions do not agree (bank 1, sensor A)
- Enclave 2008–2012 · Supported by vehicle data · 1 bulletin
- LaCrosse 2007–2012 · Supported by vehicle data · 1 bulletin
- Regal 2011–2016 · Supported by vehicle data · 1 bulletin
- Verano 2013–2016 · Supported by vehicle data · 1 bulletin
P0024: Bank 2 'B' camshaft (usually exhaust) timing is more advanced than commanded, or the system is not performing
- LaCrosse 2014 · Supported by vehicle data
P0036: A fault in the heater control circuit of the downstream oxygen sensor on bank 1
- Enclave 2013–2015 · Supported by vehicle data · 1 bulletin
P0089: Fuel pressure regulator not holding the pressure the computer asks for
- Encore GX 2020–2022 · Supported by vehicle data · 1 bulletin
P0112: The intake air temperature sensor signal reads too low in voltage, which the computer interprets as extremely hot intake air
- Rainier 2004 · Supported by vehicle data · 1 bulletin
P0221: Throttle or pedal position sensor B signal outside its normal range
- Rendezvous 2004–2005 · Supported by vehicle data · 1 bulletin
P0229: The signal from the third throttle or pedal position sensor (C) drops out or jumps now and then rather than staying wrong.
- Envision 2021–2023 · Supported by vehicle data · 1 bulletin
P0265: Cylinder 2 fuel injector circuit reads high voltage
- LaCrosse 2017 · Supported by vehicle data · 1 bulletin
P0336: The crankshaft position sensor 'A' signal is present but out of the expected range or pattern
- LaCrosse 2017 · Supported by vehicle data · 1 bulletin
P0442: EVAP system small leak detected
- Encore 2021–2022 · Supported by vehicle data · 1 bulletin
P0496: EVAP purge flow when purge should be off
- Encore GX 2020–2025 · Supported by vehicle data · 1 bulletin
P04FB: Crankcase ventilation pressure sensor reading does not make sense
- Envision 2021–2025 · Supported by vehicle data · 1 bulletin
P0506: Idle control system RPM lower than expected
- Enclave 2018 · Supported by vehicle data · 1 bulletin
P050D: Cold start rough idle
- Enclave 2025 · Supported by vehicle data · 1 bulletin
P0550: The computer is not getting a usable signal from the power steering pressure sensor or switch.
- Rainier 2004–2005 · Supported by vehicle data · 1 bulletin
P0620: Generator (alternator) control circuit fault: the engine computer sees a problem in the circuit that controls how much the alternator charges
- LeSabre 2000–2001 · Supported by vehicle data · 1 bulletin
P062F: A control module found an error in its own stored memory (EEPROM)
- LaCrosse 2012 · Supported by vehicle data · 1 bulletin
P0650: Check engine light circuit fault: the engine computer sees a problem in the circuit that switches the malfunction indicator lamp
- Century 2001–2002 · Supported by vehicle data · 1 bulletin
- Regal 2001–2002 · Supported by vehicle data · 1 bulletin
P06DE: Engine oil pressure control circuit stuck on
- Encore 2020 · Supported by vehicle data · 1 bulletin
P0712: Transmission fluid temperature sensor signal reads too low
- Lucerne 2006–2009 · Supported by vehicle data · 1 bulletin
P0742: Torque converter clutch stuck on
- Enclave 2013–2014 · Supported by vehicle data · 1 bulletin
P0746: Pressure control solenoid A is not working or stuck off
- Enclave 2018–2021 · Supported by vehicle data · 1 bulletin
- Encore GX 2024–2025 · Supported by vehicle data · 1 bulletin
P0843: Transmission fluid pressure sensor/switch A circuit, high input
- Enclave 2010 · Supported by vehicle data · 1 bulletin
- LaCrosse 2010 · Supported by vehicle data · 1 bulletin
P0989: The transmission computer sees a low voltage on the circuit of one of the transmission fluid pressure switches, labelled E
- Enclave 2008 · Supported by vehicle data · 1 bulletin
P1101: On GM and GM-era Saab engines, the airflow worked out from throttle position doesn't match the airflow measured by the MAF and MAP sensors
- Encore 2013–2022 · Supported by vehicle data · 2 bulletins
- Regal 2013–2019 · Supported by vehicle data · 1 bulletin
- Verano 2013 · Supported by vehicle data · 1 bulletin
P129F: On GM vehicles, the fuel pump power control module reports that the fuel pump speed signal is incorrect
- Enclave 2021–2023 · Supported by vehicle data
P1682: Engine computer’s two ignition voltage feeds disagree (GM)
- Enclave 2008–2017 · Supported by vehicle data · 3 bulletins
P1811: On GM vehicles (Chevrolet, Buick, Saturn): maximum adapt and long shift
- All models 1997–2002 · Supported by vehicle data · 1 bulletin
P182E: Internal mode switch reports an invalid range in a GM automatic transmission
- Enclave 2009–2017 · Supported by vehicle data · 2 bulletins
- LaCrosse 2009–2017 · Supported by vehicle data · 2 bulletins
- Regal 2009–2017 · Supported by vehicle data · 1 bulletin
P2138: Two accelerator pedal position sensor signals (D and E) that should agree with each other don't
- LaCrosse 2017–2018 · Supported by vehicle data
- Regal 2018 · Supported by vehicle data
P2227: The engine computer sees a barometric pressure reading that does not fit the engine load and throttle opening
- LaCrosse 2013–2015 · Supported by vehicle data · 1 bulletin
P228C: Fuel pressure regulator 1 cannot bring rail pressure up to target
- LaCrosse 2011–2016 · Supported by vehicle data · 1 bulletin
P2714: Pressure control solenoid D is not working or stuck off
- Encore GX 2020–2023 · Supported by vehicle data · 1 bulletin
- LaCrosse 2011 · Supported by vehicle data · 1 bulletin
P2723: Pressure control solenoid E stuck off or performing poorly
- Enclave 2007–2008 · Supported by vehicle data · 1 bulletin
- LaCrosse 2011 · Supported by vehicle data · 1 bulletin
- Regal 2011 · Supported by vehicle data · 1 bulletin
P2817: Pressure control solenoid H performance or stuck off fault in an automatic transmission
- Enclave 2025 · Supported by vehicle data · 2 bulletins
U0121: Lost communication with the anti-lock brake (ABS) module
- Regal 2013 · Supported by vehicle data · 1 bulletin
U0131: Lost communication with the power steering control module
- LaCrosse 2011–2012 · Supported by vehicle data · 1 bulletin
U0415: A module received invalid data from the anti-lock brake (ABS) module
- Envision 2016 · Supported by vehicle data · 1 bulletin
- LaCrosse 2013–2017 · Supported by vehicle data · 1 bulletin
Sources and review
- GM bulletin PIC-4871A (NHTSA 10026687)
- NHTSA complaint ODI 1414692 (2014 Buick Enclave)
- GM 050802 (Buick): Buick SIR codes B0041, a left front driver seat open deployment loop, or B1001 option configuration error
- GM 16-NA-145: replace the front passenger presence sensor (service airbag light, passenger airbag status OFF)
- GM 3460D: ABS light on with EBCM codes C0040, C0035, C0221 and/or C0220
- GM bulletins naming C0050 (cache summaries)
- GM 3741A: service stability light on, C0186 C0196 C0283 C0287 C0290 C0292 C0455 C0550 (2006 TrailBlazer family)
- GM 4698: Service StabiliTrak, C0186 C0196 (2006-2008 DTS and Lucerne)
- GM PI1525A: Airbag Readiness light on with B101D and C0186, C0196 and/or C0287 (2014-2015 Regal and Malibu)
- GM 4520: Service Stabilitrak message, DTC C0196, C0292, C0710
- GM 04-05-25-002B: ABS light on, C0265, C0201, U1041 and/or loss of communication with the brake module
- GM 03-04-21-006: service 4WD light, 4WD inoperative, no communication with TCCM, DTC C0550 (2004 TrailBlazer family)
- NHTSA complaint ODI 11042674: 2016 Buick Encore power steering failure
- GM 3936: Unwanted Stabilitrak and/or C0710 after steering wheel position sensor replacement
- GM bulletin 032503: front wheel bearing replacement for front wheel speed sensor codes
- GM 12-06-01-009F: High Feature V6 timing chain kits for stretched chains setting P0008, P0009, P0016-P0019
- GM 12-06-01-009C: High Feature V6 timing chain kits and chain guide replacements, DTCs P0008, P0009, P0016-P0019
- GM 12-06-01-009F: Information on High Feature V6 Timing Chain Kits and Chain Guide Replacements, DTCs P0008, P0009, P0016, P0017, P0018 and/or P0019
- GM PIP4548E: P0016 and/or P0017 on a properly timed engine, or crank/no start - inspect for a spun camshaft reluctor
- GM Special Coverage 16115 (GCUS-9-3286): P0014/P0024 from a sticking exhaust camshaft position actuator solenoid valve
- GM PIT5336: MIL on with O2 sensor codes including P0036, wiring chafed on the A/C hose coupling
- P0089 or P228C in history (bulletin PIP5860)
- 3192: Buick bulletin: reduced engine power message or check engine light with a list of codes including P0112
- Buick 050604032: Reduced engine power with P0121, P0221, P2119, P2122, P2138, P2176
- 22-NA-079: Cover for cold-weather poor performance and charge air cooler icing, LSY engines
- P0265: NHTSA bulletin 10083141 (Diagnosing P0264 or P0265 with P0300)
- GM 17-NA-156: ECM reprogramming for DTC P0336 Crankshaft Position Sensor Performance
- GM 22-NA-217: P0442 from a purge canister weld leak
- GM PIP6037A: P0496 and possible purge solenoid O-ring damage
- GM TechLink: Possible Condensation in Crankcase Pressure Sensor Assembly (PIP5841)
- GM 17-NA-317: low idle, stall after auto start, P034B/P0506
- GM 24-NA-244: PCM programming for cold start rough idle with P050D
- 040421004: Buick bulletin: 4WD switch indicator lights flashing, 4WD inoperative, codes C0327 and P0550
- 000604055: No start or intermittent start, low voltmeter or check charge message, P0620 may set
- NHTSA complaint ODI 11253436 (2012 Buick LaCrosse)
- 01584: P0650 set after PCM replacement
- Buick bulletin A202302140: Engine oil pump stuck by foreign material, P0521, P06DE, P06DD
- GM bulletin SB-06-06-04-021A (NHTSA 10032193)
- PI0999: MIL on, torque converter clutch sticking, shudder when stopping, DTC P0742
- GM PIP5974E: Out-of-round snap rings causing P0746 or P0747
- GM PIE0720A: Will not move in Drive, Neutral or Reverse with P0746 / P0747 (EI closure)
- GM PI0179: harsh shift into third or fifth, P0843 in the TCM
- 070730015: TFP switch check for false DTCs on 6-speed automatics
- PIP5240F: P0171 and/or P1101: inspect air cleaner housing (Encore, Trax)
- PIP5402E: P015B or Reduced Engine Power with P1101: check charge air cooler coupler O-ring
- PI0931: SES light with P0171, P1101 and/or P0101: inspect and tighten air duct clamps (Verano)
- 24-NA-139: Replace fuel pump driver control module for no start, stalling, loss of power with P023F/P129F
- GM PIT4649B: SES MIL with P1682, battery draw and/or no start (2007–2013 Acadia, Enclave, Outlook, Traverse)
- GM 00-07-30-002B: slips, harsh shifts, shudder with P1811 or P0748
- GM 17-NA-084: check engine light on with DTC P182E
- N182188250: Special coverage: accelerator pedal position sensor connection (Malibu, LaCrosse, Regal)
- GM PI1445: MIL on with DTC P2227 (XTS, Impala, Camaro, LaCrosse)
- P228C in history after pump replacement with E85 use (bulletin PIP5385)
- GM PIP5819B: Inspection and repairs for P2714 on the VT40 CVT
- GM PI-1131: Missing gears with P0776, P0796, P0878, P0873, P2714 or P2723 from a non-functioning pressure control solenoid
- PI-1131: Missing gears, DTCs P0776, P0796, P0878, P0873, P2714 or P2723
- TSB 07-07-30-019: 6T70/6T75 check engine light, poor performance, DTCs include P2723
- GM PIP6005: possible damaged turbine shaft seal causing P2817
- GM PIC-5652-B: U0121 stored in the multi-axis acceleration sensor module
- GM PIC-5651: Intermittent Service Power Steering message with U0131
- GM 16-NA-248: Replace wheel speed sensor for StabiliTrak, traction and AWD disabled messages
- GM 19-NA-182: "Steering Assist Is Reduced" message with C056D or U0415
- NHTSA ODI consumer complaints flat files
- GM PIP5841A to PIP5841E: condensation freezing in the crankcase pressure sensor, DTC P04FB
- 05-06-04-060A: Information on control module DTCs P0601, P0602, P0603, P0604, P0606, P062F, P06F3, P1621 shared in multiple modules
- 18-NA-333: MIL, whistle noise at startup and P1101 (Encore)
- 20-NA-047: Front or rear crankshaft oil leak with MIL and P1101
- GM bulletin 19NA276: reduced engine power and/or stall with P1682 and/or P0689 (2013–2017 Enclave, Traverse, Acadia)
- GM PIT5643: P0689 and/or P1682, arcing or corrosion at X3 terminal 51 of the underhood fuse block (2013–2014 Enclave, Acadia, Traverse)
- Last reviewed
- Written by
- Saurabh K.
- Editorial review
- Pending
- Technician review
- Technician review pending
This page explains what a code usually means; it is not a substitute for a professional inspection. How we source and review · Report an error