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Fault codes

183 of the most common engine fault codes in plain English.

Camshaft timing (VVT) (6)

P0010Fault in the camshaft adjuster valve wiring (intake)P0011Intake camshaft timing too far advancedP0012Intake camshaft timing too far retardedP0013Fault in the exhaust camshaft adjuster valve wiringP0014Exhaust camshaft timing too far advancedP0021Intake camshaft timing too far advanced (bank 2)

Engine sensors and timing chain (8)

P0016Crankshaft and camshaft out of sync (intake)P0017Crankshaft and camshaft out of sync (exhaust)P0320Engine speed signal drops outP0335No signal from the crankshaft sensorP0336Crankshaft sensor signal is intermittentP0340No signal from the camshaft sensorP0341Camshaft sensor signal is faultyP0345No signal from the camshaft sensor (bank 2)

Oxygen (lambda) sensors (27)

P0030Front oxygen sensor heater not workingP0031Front oxygen sensor heater: voltage too lowP0032Front oxygen sensor heater: voltage too highP0036Rear oxygen sensor heater not workingP0037Rear oxygen sensor heater: voltage too lowP0038Rear oxygen sensor heater: voltage too highP0050Front oxygen sensor heater not working (bank 2)P0130Fault in the front oxygen sensor wiringP0131Front oxygen sensor voltage too lowP0132Front oxygen sensor voltage too highP0133Front oxygen sensor responds slowlyP0134Front oxygen sensor not workingP0135Front oxygen sensor heater not workingP0136Fault in the rear oxygen sensor wiringP0137Rear oxygen sensor voltage too lowP0138Rear oxygen sensor voltage too highP0139Rear oxygen sensor responds slowlyP0140Rear oxygen sensor not workingP0141Rear oxygen sensor heater not workingP0150Fault in the front oxygen sensor wiring (bank 2)P0151Front oxygen sensor voltage too low (bank 2)P0153Front oxygen sensor responds slowly (bank 2)P0155Front oxygen sensor heater not working (bank 2)P0156Fault in the rear oxygen sensor wiring (bank 2)P0161Rear oxygen sensor heater not working (bank 2)P2195Front oxygen sensor reads lean all the timeP2196Front oxygen sensor reads rich all the time

Fuel and air (12)

P0068Air flow doesn't match the accelerator positionP0087Fuel pressure too lowP0088Fuel pressure too highP0089Fuel pressure regulator can't hold pressure steadyP0093Large leak in the fuel systemP0101Mass air flow sensor reads wrongP0191Fuel pressure sensor reads wrongP0230Fault in the fuel pump power supplyP0627Fault in fuel pump controlP2004Swirl flaps stuck openP2015Swirl flap position sensor reads wrongP2279Air leak in the intake

Sensors (29)

P0100Fault in the mass air flow sensor wiringP0102Mass air flow sensor signal too lowP0103Mass air flow sensor signal too highP0105Fault in the intake pressure (MAP) sensor wiringP0106Intake pressure (MAP) sensor reads wrongP0107Intake pressure (MAP) sensor signal too lowP0108Intake pressure (MAP) sensor signal too highP0110Fault in the intake air temperature sensor wiringP0112Intake air temperature sensor reads too warmP0113Intake air temperature sensor reads too coldP0115Fault in the engine temperature sensor wiringP0117Engine temperature sensor reads too hotP0118Engine temperature sensor reads too coldP0120Fault in the throttle or accelerator pedal sensor wiringP0121Throttle position sensor reads wrongP0122Throttle position sensor signal too lowP0123Throttle position sensor signal too highP0190Fault in the fuel pressure sensor wiringP0192Fuel pressure sensor signal too lowP0193Fuel pressure sensor signal too highP0220Fault in the second throttle or accelerator pedal sensor wiringP0221Second throttle position sensor reads wrongP0222Second throttle position sensor signal too lowP0223Second throttle position sensor signal too highP0461Fuel gauge reading is wrongP0530Fault in the A/C pressure sensor wiringP0571Fault in the brake light switchP2135The two throttle sensors disagreeP2138The two accelerator pedal sensors disagree

Cooling (5)

P0116Engine temperature sensor reads wrongP0125Engine warms up too slowlyP0128Engine stays too cold (thermostat)P0217Engine has overheatedP0480Fault in radiator fan control

Fuel mixture (7)

P0171Mixture too leanP0172Mixture too richP0174Mixture too lean (bank 2)P0175Mixture too rich (bank 2)P2096Mixture too lean after the catalytic converterP2097Mixture too rich after the catalytic converterP2187Mixture too lean at idle

Injectors (5)

P0200Fault in injector controlP0201Fault in the cylinder 1 injector wiringP0202Fault in the cylinder 2 injector wiringP0203Fault in the cylinder 3 injector wiringP0204Fault in the cylinder 4 injector wiring

Engine computer and electrics (6)

P0219Engine speed went too highP0600Control modules can't communicate with each otherP0601Fault in the engine computer memoryP0603Engine computer lost its learned valuesP0606Fault in the engine computer processorP0641Sensor supply voltage has dropped out

Turbo and boost pressure (8)

P0234Turbo boost pressure too highP0235Fault in the boost pressure sensor wiringP0236Boost pressure sensor reads wrongP0237Boost pressure sensor signal too lowP0238Boost pressure sensor signal too highP0243Fault in the turbo wastegate solenoidP0299Turbo boost pressure too lowP2263Turbo not delivering the right boost

Ignition and misfires (14)

P0300Misfires in several cylindersP0301Misfire in cylinder 1P0302Misfire in cylinder 2P0303Misfire in cylinder 3P0304Misfire in cylinder 4P0305Misfire in cylinder 5P0306Misfire in cylinder 6P0307Misfire in cylinder 7P0308Misfire in cylinder 8P0316Misfire right after startingP0351Fault in the cylinder 1 ignition coilP0352Fault in the cylinder 2 ignition coilP0353Fault in the cylinder 3 ignition coilP0354Fault in the cylinder 4 ignition coil

Knock sensor (5)

P0325Fault in the knock sensor wiringP0326Knock sensor reads wrongP0327Knock sensor signal too weakP0328Knock sensor signal too strongP0330Fault in the second knock sensor wiring

Battery, charging and glow plugs (6)

P0380Fault in the glow plug power supplyP0560Battery voltage is wrongP0562Battery voltage too lowP0563Charging voltage too highP0620Fault in alternator controlP0670Fault in the glow plug control module

EGR valve (9)

P0400EGR valve not working properlyP0401Too little gas flowing through the EGR valveP0402Too much gas flowing through the EGR valveP0403Fault in the EGR valve wiringP0404EGR valve isn't where it should beP0405EGR valve position sensor signal too lowP0406EGR valve position sensor signal too highP0411Secondary air pump not delivering enough airP0490Short circuit in the EGR valve wiring

Catalytic converter (3)

P0420Catalytic converter no longer cleaning properlyP0421Pre-catalyst no longer cleaning properlyP0430Catalytic converter no longer cleaning properly (bank 2)

Tank venting and fuel vapours (10)

P0440Fault in the fuel vapour (EVAP) systemP0441Tank purge not working properlyP0442Small leak in the fuel vapour systemP0443Fault in the purge valve wiringP0446Charcoal canister vent valve not workingP0449Fault in the canister vent valve wiringP0451Tank pressure sensor reads wrongP0455Large leak in the fuel vapour systemP0456Very small leak in the fuel vapour systemP0457Fuel cap loose or missing

Diesel particulate filter (DPF) (6)

P0471Exhaust pressure sensor reads wrongP2002Particulate filter not cleaning properlyP242FParticulate filter full of ashP2452Fault in the particulate filter pressure sensor wiringP2453Particulate filter pressure sensor reads wrongP2463Particulate filter full of soot

Speed sensor (2)

P0500No signal from the speed sensorP0501Speed sensor reads wrong

Idle and throttle (4)

P0505Idle speed won't stay steadyP0506Idle speed too lowP0507Idle speed too highP2101Throttle motor not working properly

Oil pressure (2)

P0520Fault in the oil pressure sensor wiringP0521Oil pressure is wrong

Automatic gearbox (9)

P0700Fault in the gearboxP0705Gear selector sensor gives a wrong readingP0715Gearbox input shaft speed sensor not workingP0720Gearbox output shaft speed sensor not workingP0730Gearbox slippingP0740Fault in the torque converter lock-up clutch wiringP0741Torque converter lock-up clutch doesn't engageP0750Shift solenoid A not workingP0755Shift solenoid B not working
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