P0206 Cylinder 6 fuel injector circuit fault

Cylinder 6 injector circuit malfunction

P0206 in short

P0206 means the engine computer found a fault in the electrical circuit of the cylinder 6 fuel injector. Causes include a failed injector, a wiring fault or an injector driver problem in the computer. Misfire and stalling are possible, so get it checked soon.

The computer switches each injector and watches the circuit. TroubleCodes.net says P0206 is set when it commanded the injector and did not see the expected change in current.

Listed causes are a failed injector, an injector circuit wiring fault and the computer's injector driver. Check service information to see which cylinder is number 6 on your engine.

The Delaware DMV generic code list gives the same title, injector circuit malfunction, cylinder 6.

Most likely causes

These are general causes for this code across vehicles. None is specific to one make or model.

  1. Failed fuel injector

    Common general cause
    Why it ranks here
    TroubleCodes.net lists failed injectors first.
    What would change this
    Rises if injector resistance is out of spec or an injector balance test fails. Falls if it tests normally.
    How to test the fuel injector

  2. Fault in the injector circuit wiring

    Common general cause
    Why it ranks here
    TroubleCodes.net lists circuit and wiring faults.
    What would change this
    Rises if the connector or harness is damaged. Falls if wiring tests clean.

  3. Injector driver fault in the computer

    Possible — needs testing
    Why it ranks here
    TroubleCodes.net lists a computer injector driver problem.
    What would change this
    Rises if the injector and wiring test fine but the circuit is not switched. Falls if the circuit switches normally.
    How to test the engine control module (ecm / pcm)

What to test first

Start at step 1. Each result tells you what it means and where to go next.

  1. Read all codes and note any misfire codes stored with P0206.

    Low riskTool: OBD-II scan tool

  2. Have the injector connector, power feed, ground switching, coil resistance and pulse tested (noid light or oscilloscope).

    Best left to a shopTool: multimeter, noid light

    Warning:Injectors are under fuel pressure and sit near hot parts. Let a shop do it.

Symptoms

  • Check engine light
  • Misfire or rough running
  • Stalling or hard starting Gets more serious: stop and have it checked.

How to fix

Parts and cost context

  • Fuel injector:Confirm with injector tests before replacing. Labour varies; get a quote.

Labor varies by vehicle and shop; get a quote before you approve a repair.

Compare used part prices on PartPriceGuide

On your vehicle

Ford

  • 2021–2025 · F-150

    Supported by vehicle data

    Ford TSB 25-2569 covers a MIL with DTCs P0301-P0306 and P0201-P0206 on the F-150, which the summary attributes to the engine harness contacting the hose crimp end or spring clamp tangs on the exhaust heat exchanger heater hose assembly. Whether it is still current is not verified.

  • 2008 · F-250 Super Duty

    Supported by vehicle data

    Ford bulletin 19620 covers injector circuit open codes P0201-P0208 with a misfire, rough running or lack of power condition on 2008 Super Duty trucks. Whether it is still current is not verified.

  • TSB 25-2569Status unverified

    MIL with DTCs P0301-P0306 and P0201-P0206 from engine harness contact

    2021–2025f-150 · issued · NHTSA 11025829

    Ford bulletin for an illuminated MIL with DTCs P0301-P0306, P0201-P0206 and other powertrain DTCs in the PCM, which the summary attributes to the engine harness contacting the hose crimp end or spring clamp tangs on the exhaust heat exchanger heater hose assembly.

    We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

  • 19620Status unverified

    Injector circuit open codes P0201-P0208 with misfire, rough running or lack of power

    2008f-250-super-duty, f-350-super-duty, f-450-super-duty · issued · NHTSA 10021620

    Ford bulletin for injector circuit open codes P0201 through P0208 with a misfire, rough running or lack of power condition. The summary does not give the repair.

    We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

Chevrolet

  • 2020–2021 · Silverado 1500

    Supported by vehicle data

    GM preliminary information PIT5751C covers the service engine soon light with DTCs P0201-P0206 and P0216 and tells the dealer to inspect the engine wiring harness for damage, on 2020-2021 Silverado 1500, Suburban and Tahoe. Whether it is still current is not verified.

  • PIT5751C (chevrolet)Status unverified

    SES light with DTCs P0201-P0206 and P0216, inspect engine wiring harness

    2020–2021silverado-1500, suburban, tahoe · issued · NHTSA 10187189

    General Motors preliminary information about the service engine soon light with DTCs P0201 through P0206 and P0216, telling the dealer to inspect the engine wiring harness for damage.

    We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

GMC

  • 2020–2021 · Sierra 1500

    Supported by vehicle data

    GM preliminary information PIT5751C covers the service engine soon light with DTCs P0201-P0206 and P0216 and tells the dealer to inspect the engine wiring harness for damage, on 2020-2021 Sierra 1500 and Yukon XL. Whether it is still current is not verified.

  • PIT5751C (gmc)Status unverified

    SES light with DTCs P0201-P0206 and P0216, inspect engine wiring harness

    2020–2021sierra-1500, yukon-xl · issued · NHTSA 10187189

    General Motors preliminary information about the service engine soon light with DTCs P0201 through P0206 and P0216, telling the dealer to inspect the engine wiring harness for damage.

    We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

Cadillac

  • 2021 · Escalade ESV

    Supported by vehicle data

    GM preliminary information PIT5751C covers the service engine soon light with DTCs P0201-P0206 and P0216 and tells the dealer to inspect the engine wiring harness for damage, on the 2021 Escalade ESV. Whether it is still current is not verified.

  • PIT5751C (cadillac)Status unverified

    SES light with DTCs P0201-P0206 and P0216, inspect engine wiring harness

    2021escalade-esv · issued · NHTSA 10187189

    General Motors preliminary information about the service engine soon light with DTCs P0201 through P0206 and P0216, telling the dealer to inspect the engine wiring harness for damage.

    We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

Ram

  • 2014 · 3500

    Supported by vehicle data

    Ram bulletin 1800214 reprograms the ECM/PCM on Cummins 6.7L diesel trucks and, per the summary, changes P0201-P0206 injector circuit/open faults from one-trip to two-trip faults when no defect is present. Whether it is still current is not verified.

  • 1800214Status unverified

    Flash: 6.7L diagnostic and system improvements

    20143500 · issued · NHTSA 10229908

    Ram bulletin for reprogramming the ECM/PCM on vehicles with the Cummins 6.7L diesel. The summary lists changing P0201-P0206, fuel injector circuit/open faults, from one-trip to two-trip faults when no defect is present.

    We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

  • P0205Fault in the electrical circuit for the fuel injector on cylinder 5

    Same system Common general cause

    P0205 is the cylinder 5 injector circuit code in the same family.

  • P0207Cylinder 7 fuel injector circuit fault

    Same system Common general cause

    P0207 is the cylinder 7 injector circuit code in the same family.

  • P0200Fault in an injector circuit, cylinder not identified

    Same system Common general cause

    P0200 is the general injector circuit code.

All Fuel pump and injectors codes

Sources and review

  1. P0206 trouble code explanation — TroubleCodes.net
  2. TSB 25-2569: MIL with DTCs P0301-P0306 and P0201-P0206 from engine harness contact — Ford
  3. 19620: Injector circuit open codes P0201-P0208 with misfire, rough running or lack of power — Ford
  4. PIT5751C: SES light with DTCs P0201-P0206 and P0216, inspect engine wiring harness — General Motors
  5. PIT5751C: SES light with DTCs P0201-P0206 and P0216, inspect engine wiring harness — General Motors
  6. PIT5751C: SES light with DTCs P0201-P0206 and P0216, inspect engine wiring harness — General Motors
  7. 1800214: Flash: 6.7L diagnostic and system improvements — Ram
  8. On-Board Diagnostic Trouble Codes (generic code title list) — Delaware Division of Motor Vehicles
Last reviewed
Written by
Saurabh K.
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