Engine Diagnostic Codes (P0XXX)

Complete list of engine diagnostic trouble codes (P0XXX). Browse powertrain codes for engine, transmission, and emission control systems.

Popular Engine Codes

P0100

Mass Air Flow Circuit

Mass or Volume Air Flow Circuit malfunction

P0171

System Too Lean (Bank 1)

System too Lean (Bank 1)

P0300

Random/Multiple Cylinder Misfire

Random/Multiple Cylinder Misfire Detected

P0420

Catalyst System Efficiency

Catalyst System Efficiency Below Threshold (Bank 1)

P0442

EVAP System Leak

Evaporative Emission Control System Leak Detected (small leak)

Complete Engine Codes Index

Browse all available engine diagnostic trouble codes (P0XXX) organized by system:

Showing codes 701-800 of 4123 total codes

P02XX Engine Control System

P02BC
DTC P02BC refers to a Diesel Exhaust Fluid quality issue detected by the ECM.
P02BD
DTC P02BD indicates a performance issue with the fuel delivery system on Bank 1.
P02BE
P02BE indicates low voltage in the fuel injector circuit.
P02BF
DTC P02BF indicates an issue with the exhaust gas recirculation system,
P02C0
P02C0 indicates a fuel system issue, often related to fuel pressure or delive...
P02C1
P02C1 means there's a fuel injection system performance issue in your vehicle.
P02C2
The diagnostic trouble code (DTC) P02C2 indicates that the engine control mod...
P02C3
DTC P02C3 indicates a high voltage in the fuel injector control circuit.
P02C4
DTC P02C4 indicates a fuel injector circuit performance problem.
P02C5
P02C5 indicates a fuel injection performance issue, often related to injector...
P02C6
P02C6 indicates a fuel metering control issue that can lead to engine perform...
P02C7
P02C7 means there's a problem with the fuel injector circuit indicating it's ...
P02C8
P02C8 indicates low voltage in the fuel injector circuit.
P02C9
P02C9 indicates a fuel metering issue in your engine, often linked to fuel in...
P02CA
The P02CA code indicates a fuel injector or fuel system performance issue det...
P02CB
The P02CB code indicates a fuel delivery issue, often related to low fuel rai...
P02CC
DTC P02CC signifies a rich fuel mixture, indicating too much fuel in relation...
P02CD
DTC P02CD indicates a performance issue with a fuel injector circuit.
P02CE
P02CE indicates a fuel metering issue in your vehicle’s engine,
P02CF
P02CF indicates a fuel injector performance issue detected by the engine cont...
P02D0
DTC P02D0 indicates a fuel pressure regulator issue, affecting fuel delivery.
P02D1
Indicates there is a performance issue with the fuel injection system.
P02D2
P02D2 is a diagnostic code indicating a high voltage condition in the fuel in...
P02D3
P02D3 indicates a fault in the fuel injector circuit for cylinder three.
P02D4
P02D4 indicates a fuel injection system performance problem, particularly in ...
P02D5
P02D5 indicates a fuel injector performance issue.
P02D6
P02D6 indicates a fuel injector performance issue related to fuel delivery.
P02D7
The diagnostic trouble code (DTC) P02D7 indicates a performance issue with th...
P02D8
The P02D8 code indicates a fuel system performance issue, particularly with f...
P02D9
P02D9 indicates a fuel injection performance issue in your engine.
P02DA
The P02DA code points to a fuel delivery issue detected by the ECM,
P02DB
P02DB indicates a high voltage condition in the fuel injector circuit.
P02DC
DTC P02DC indicates a problem with fuel trim levels, affecting engine perform...
P02DD
The P02DD code indicates a problem with diesel exhaust fluid quality,
P02DE
DTC P02DE indicates a fuel delivery performance issue, signaling a problem wi...
P02DF
P02DF indicates a fuel metering control error affecting engine performance.
P02E0
P02E0 indicates a low voltage condition in the fuel injector circuit.
P02E1
The P02E1 code indicates a problem with the fuel injection system,
P02E2
DTC P02E2 signifies a fuel injection system performance issue.
P02E3
DTC P02E3 refers to a fuel injection system malfunction detected by the ECM.
P02E4
DTC P02E4 refers to a fuel injection system performance issue.
P02E5
P02E5 indicates a fuel metering control error, resulting in incorrect fuel de...
P02E6
P02E6 indicates a problem with the fuel injector circuit performance,
P02E7
P02E7 indicates a problem with the fuel delivery system related to the intake...
P02E8
DTC P02E8 indicates a performance issue with the fuel pressure regulator,
P02E9
P02E9 means there's a fuel injection timing issue.
P02EA
P02EA indicates a fuel pressure regulator performance issue, affecting fuel d...
P02EB
P02EB indicates a malfunction in a fuel injector, leading to poor engine perf...
P02EC
P02EC indicates a fuel injection system malfunction.
P02ED
P02ED indicates a rich fuel trim condition, meaning too much fuel is being de...
P02EE
P02EE means the diesel particulate filter is not functioning effectively,
P02EF
P02EF indicates an air-to-fuel ratio imbalance, impacting engine performance.
P02F0
P02F0 indicates a fuel injector control error, affecting fuel delivery.
P02F1
P02F1 indicates a fuel delivery performance issue, often linked to fuel injec...
P02F2
P02F2 means there is a low voltage issue in the fuel injector circuit for cyl...
P02F3
Indicates a problem with the fuel injector circuit, specifically that it is o...
P02F4
P02F4 indicates a problem with the intake air temperature sensor circuit,
P02F5
P02F5 indicates a high voltage in the fuel injector circuit, which can affect...
P02F6
The P02F6 code means there’s a fuel system performance issue detected by the ...
P02F7
P02F7 indicates an issue with the air-fuel mixture control system,
P02F8
P02F8 indicates a fuel trim system performance issue, often affecting engine ...
P02F9
The P02F9 code indicates a fuel injector issue, potentially leading to poor e...
P02FA
The P02FA code indicates a fuel pressure regulator performance issue.
P02FB
DTC P02FB indicates a fuel delivery issue, often related to the fuel injector...
P02FC
P02FC indicates a fuel air ratio imbalance in the engine.
P02FD
P02FD indicates a problem with the fuel injector circuit, affecting fuel deli...
P02FE
P02FE indicates a fuel delivery problem, usually with the fuel injector circuit.
P02FF
DTC P02FF signifies an issue with fuel system performance or pressure.

P03XX Engine Control System

P0300
P0300 indicates a random or multiple cylinder misfire in your engine.
P0301
P0301 indicates a misfire detected in cylinder 1 of the engine.
P0302
DTC P0302 means that cylinder 2 in your engine is misfiring. This can lead to...
P0303
P0303 means there is a misfire in cylinder 3 of your engine.
P0304
P0304 indicates a misfire in cylinder 4, affecting engine performance.
P0305
P0305 indicates a misfire in cylinder 5.
P0306
P0306 signals a misfire in cylinder 6 of your engine.
P0307
P0307 means a misfire is detected in cylinder 7 of your engine.
P0308
P0308 indicates a misfire in cylinder 8 of the engine.
P0309
P0309 indicates a misfire in cylinder 9, affecting engine performance.
P030A
P030A indicates a misfire in cylinder one.
P030B
P030B indicates a misfire in cylinder 2, affecting engine performance.
P030C
P030C means a misfire is detected in cylinder 3 of your engine.
P030D
P030D indicates a misfire in cylinder 4.
P030E
The P030E code indicates a misfire in cylinder 4, which can lead to performan...
P030F
P030F indicates a misfire in cylinder 4.
P0310
P0310 indicates an ignition system misfire in cylinder 10.
P0311
DTC P0311 indicates a misfire detected on startup, affecting engine performance.
P0312
P0312 means there is a misfire detected in cylinder 2 of your engine.
P0313
P0313 indicates a misfire detected when fuel is low.
P0314
P0314 means there is a cylinder misfire detected, impacting engine performance.
P0315
P0315 indicates a problem with the crankshaft position variation learning pro...
P0316
P0316 indicates a misfire in the first 1000 revolutions of the engine,
P0317
The P0317 code indicates a misfire in cylinder 7, affecting engine performance.
P0318
P0318 indicates a misfire detection related to the crankshaft position sensor.
P0319
Code P0319 indicates a misfire in the first cylinder.
P031A
P031A indicates a misfire detected during engine start-up.
P031B
P031B indicates a misfire detected during the first 1000 revolutions of the e...
P031C
DTC P031C indicates a misfire in one of the engine cylinders, affecting vehic...
P031D
P031D indicates an engine misfire detected during startup.
P031E
P031E indicates a detected engine misfire that occurs under specific conditions.
P031F
DTC P031F relates to engine misfire detection issues.
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