B1325: Control module power circuit fault (GM)
Control module power circuit, low voltage fault
Severity: Inspect soon
GM's bulletin 08-02-32-005 ties B1325 on some Malibus to loss of power steering assist, and another bulletin to the airbag light during low voltage, so it should not be ignored.
It gets more serious if:
- Stop: Stop if power steering assist is lost or the car is hard to steer.
B1325 in short
On GM vehicles, B1325 means a control module reported a problem with its power supply. Bulletins link it to low battery voltage, radio dropouts and, on some 2004 to 2006 Malibus, loss of power steering assist. Check the battery and charging first. Get it looked at soon, and stop driving if steering assist is lost.
Every control module needs steady power. B1325 is set when a module sees a power circuit problem, and it often appears with other voltage and communication codes.
GM's bulletins tie it to a low battery condition on 2007 to 2009 Escalades, to radio turning on and off on Cruzes, and to an ignition coil and ground issue that cut power steering assist on some Malibus.
Because one low-voltage cause can set many codes, treat B1325 as a clue to the power supply rather than a failed module.
Pick your make
B1325 is a manufacturer-specific code: its meaning depends on who built the car.
Other makes: meaning not verified. Check with a scan tool that reads manufacturer definitions.
Most likely causes
Cause 1: Low battery or system voltage
Supported by vehicle data- Why it ranks here
- GM bulletin PIC-4872 says a low battery or voltage condition can set B1325 sym 03 with other faults, and Impala and Sierra complaints list it with other voltage codes.
- What would change this
- Rises if the battery or charging voltage tests low. Falls if voltage is steady.
Cause 2: Ignition coil/module and ground (3.5L Malibu)
Supported by vehicle data- Why it ranks here
- GM bulletin 08-02-32-005 pairs B1325 with C0900 and loss of power steering assist on the 2004 to 2006 Malibu 3.5L and replaces the coil/module and adds a ground strap.
- What would change this
- Rises on a 3.5L Malibu with power steering faults. Falls on other models.
What to test first
Start at step 1. Each result tells you what it means and where to go next.
Step 1: Read all codes and note whether B1325 is stored with low voltage, steering or radio codes.
IfLow voltage or communication codes are stored with B1325
It meansTest the battery and charging system first.
IfC0900 is stored on a 2004-2006 Malibu 3.5L
It meansGM bulletin 08-02-32-005 applies.
Step 2: Have the battery and charging voltage tested at a shop or parts store.
IfVoltage is low or the battery is weak
It meansLow voltage is the likely cause.
IfVoltage is normal
It meansA dealer should check the module power and ground circuits and bulletins for your model.
Symptoms
- Radio turning on and off or erratic displays
- Airbag or other warning lights on at the same time as low battery
- Loss of power steering assist Gets more serious: stop and have it checked.
How to fix
Step 1: Have the battery and charging system tested, since low voltage is a bulletin-listed cause.
Step 2: Ask a dealer whether a bulletin covers B1325 on your model and year.
On your vehicle
ChevroletYour car
2004–2006 · Malibu
Supported by vehicle dataGM bulletin 08-02-32-005 covers B1325 with C0900 and lost power steering assist on 3.5L engines, with a coil/module replacement and a ground strap. Whether it is still current is not verified.
08-02-32-005Status unverified
Loss of power steering assist, C0900 and B1325
2004–2006malibu · issued · NHTSA 10025672
Replace the ignition coil/module assembly and add a ground strap on 3.5L Malibus.
We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.
PI1398Status unverified
Radio on and off with DTC C0800, B1325 or B1517
2011–2015cruze · issued · NHTSA 10139432
Preliminary repair information for a radio turning on and off with these codes.
We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.
Related codes
No curated relationships for B1325 yet.
Sources and review
- GM 08-02-32-005: loss of power steering assist, DTC C0900, B1325 set; replace ignition coil/module assembly and add ground strap (2004-2006 Malibu 3.5L)
- GM PIC-4872: SIR light on with DTC B1325 sym 03 during a low battery/voltage condition (GMC, Chevrolet, Cadillac)
- NHTSA complaint ODI 1598897 (2014 Chevrolet Impala)
- NHTSA complaint ODI 1789781 (2020 GMC Sierra 2500)
- GM PI1398: radio turning on and off, intermittent MIL, DTC C0800, B1325 or B1517 set (2011-2015 Cruze)
- Last reviewed
- Written by
- Saurabh K.
- Editorial review
- Pending
- Technician review
- Technician review pending
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