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P-codes

Powertrain codes (P0xxx)

Engine, fuel, ignition and emissions faults — the most common diagnostic trouble codes.

Powertrain codes (P0xxx)

Engine, fuel, ignition and emissions faults — the most common diagnostic trouble codes.

Chassis codes (C0xxx)

ABS, traction control, brake and stability electronics.

Body codes (B0xxx)

Airbags (SRS), climate control, lights and body modules.

Network codes (U0xxx)

Communication faults between modules over the CAN bus.

Code	Meaning	System
P0404	EGR valve range / performance	Emissions / EGR
P0405	EGR sensor A circuit low	Emissions / EGR
P0411	Secondary air injection system incorrect flow	Emissions
P0420	Catalyst system efficiency below threshold — Bank 1	Emissions
P0430	Catalyst efficiency below threshold — Bank 2	Emissions
P0440	EVAP system malfunction	Evaporative emissions
P0441	EVAP incorrect purge flow	Evaporative emissions
P0442	Small leak in EVAP system	Evaporative emissions
P0443	EVAP purge valve circuit malfunction	Evaporative emissions
P0446	EVAP vent valve control circuit malfunction	Evaporative emissions
P0451	EVAP pressure sensor range / performance	Evaporative emissions
P0453	EVAP pressure sensor high input	Evaporative emissions
P0455	Large leak in EVAP system	Evaporative emissions
P0456	Very small leak in EVAP system	Evaporative emissions
P0457	EVAP leak detected — fuel cap loose	Evaporative emissions
P0461	Fuel level sensor range / performance problem	Fuel gauge
P0462	Fuel level sensor circuit low input	Fuel gauge
P0463	Fuel level sensor circuit high input	Fuel gauge
P0480	Cooling fan relay 1 control circuit malfunction	Cooling
P0496	EVAP purge system flow during non-purge	Evaporative emissions

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