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Generic Fault Codes & DTC List

Manufacturer and ECU-specific fault-code meanings. Check the stated ECU, model and code format against your diagnostic scan.

Generic fault codes — page 19
CodeMeaningApplicability
P0495Engine coolant blower motor speed -highGeneric Generic OBD
P0496Evaporative emission (EVAP) system -high purge flowGeneric Generic OBD
P0497Evaporative emission (EVAP) system -low purge flowGeneric Generic OBD
P0498Evaporative emission (EVAP) system, vent control circuit lowGeneric Generic OBD
P0499Evaporative emission (EVAP) system, vent control -circuit highGeneric Generic OBD
P049AExhaust Gas Recirculation "B" FlowGeneric Generic OBD
P049BExhaust Gas Recirculation "B" Flow Insufficient DetectedGeneric Generic OBD
P049CExhaust Gas Recirculation "B" Flow Excessive DetectedGeneric Generic OBD
P049DExhaust Gas Recirculation "A" Control Position Exceeded Learning LimitGeneric Generic OBD
P049EExhaust Gas Recirculation "B" Control Position Exceeded Learning LimitGeneric Generic OBD
P049FExhaust Pressure Control Valve "B"Generic Generic OBD
P04AAExhaust Pressure Control Valve "B" Position Sensor/Switch Circuit Intermittent/ErraticGeneric Generic OBD
P0500Vehicle speed sensor (VSS) -circuit malfunctionGeneric Generic OBD
P0501Vehicle speed sensor (VSS) -range/performance problemGeneric Generic OBD
P0502Vehicle speed sensor (VSS) -low inputGeneric Generic OBD
P0503Vehicle speed sensor (VSS) -intermittent/erratic/high inputGeneric Generic OBD
P0504Brake switch -A/B correlationGeneric Generic OBD
P0505Idle speed control (ISC) system -malfunctionGeneric Generic OBD
P0506Idle speed control (ISC) system -rpm lower than expectedGeneric Generic OBD
P0507Idle speed control (ISC) system -rpm higher than expectedGeneric Generic OBD
P0508Idle air control (IAC) -circuit lowGeneric Generic OBD
P0509Idle air control (IAC) -circuit highGeneric Generic OBD
P050ACold Start Idle Air Control System PerformanceGeneric Generic OBD
P050BCold Start Ignition Timing PerformanceGeneric Generic OBD
P050CCold Start Engine Coolant Temperature PerformanceGeneric Generic OBD
P050DCold Start Rough IdleGeneric Generic OBD
P050ECold Start Engine Exhaust Temperature Too LowGeneric Generic OBD
P050FBrake Assist Vacuum Too LowGeneric Generic OBD
P0510Closed throttle position (CTP) switch -circuit malfunctionGeneric Generic OBD
P0511Idle air control (IAC) -circuit malfunctionGeneric Generic OBD
P0512Starter request circuit -malfunctionGeneric Generic OBD
P0513Incorrect immobilizer keyGeneric Generic OBD
P0514Battery temperature sensor -circuit range/performanceGeneric Generic OBD
P0515Battery temperature sensor -circuit malfunctionGeneric Generic OBD
P0516Battery temperature sensor -circuit lowGeneric Generic OBD
P0517Battery temperature sensor -circuit highGeneric Generic OBD
P0518Idle air control (IAC) -circuit intermittentGeneric Generic OBD
P0519Idle air control (IAC) -circuit performanceGeneric Generic OBD
P051ACrankcase Pressure Sensor CircuitGeneric Generic OBD
P051BCrankcase Pressure Sensor Circuit Range/PerformanceGeneric Generic OBD
P051CCrankcase Pressure Sensor Circuit LowGeneric Generic OBD
P051DCrankcase Pressure Sensor Circuit HighGeneric Generic OBD
P051ECrankcase Pressure Sensor Circuit Intermittent/ErraticGeneric Generic OBD
P051FPositive Crankcase Ventilation Filter RestrictionGeneric Generic OBD
P0520Engine oil pressure sensor/switch -circuit malfunctionGeneric Generic OBD
P0521Engine oil pressure sensor/switch -range/performance problemGeneric Generic OBD
P0522Engine oil pressure sensor/switch -low voltageGeneric Generic OBD
P0523Engine oil pressure sensor/switch -high voltageGeneric Generic OBD
P0524Engine oil pressure too lowGeneric Generic OBD
P0525Cruise control system, actuator control circuit range/performanceGeneric Generic OBD

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