Diagnostic library
Find an OBD2 code
Search the code from your scanner, then narrow the library by system, severity, or code family.
9,253 diagnostic guides
Find codes by symptomChoose what you notice to search matching code guides.
Rough idle or shakingVibration while stoppedHard to startLong cranking or no-startEngine stallsCuts out at idle or on the roadHesitates or loses powerSlow response when acceleratingBattery light is onCharging system warningHarsh gear changesDelayed or rough shifting
A symptom can have several causes. Treat matching codes as clues and follow the diagnostic checks in each guide.
Quick browse
Choose a vehicle system
FiltersSeverity · family
Vehicle coverage
These are generic OBD2 definitions. Exact make, model, engine, and year compatibility will appear after vehicle-fitment data is added.
Diagnostic codes
Showing 577–600 of 833
P27CCPressure Control Solenoid R IntermittentCheck soonTransmission Issues30–120 minutes for initial diagnosisP27CDPressure Control Solenoid R Control Circuit/OpenCheck soonTransmission Issues30–120 minutes for initial diagnosisP27CEPressure Control Solenoid R Control Circuit Range/PerformanceCheck soonTransmission Issues30–120 minutes for initial diagnosisP27CFPressure Control Solenoid R Control Circuit LowCheck soonTransmission Issues30–120 minutes for initial diagnosisP27D0Pressure Control Solenoid R Control Circuit HighCheck soonTransmission Issues30–120 minutes for initial diagnosisP27D1Pressure Control Solenoid S Performance/Stuck OffCheck soonTransmission Issues30–120 minutes for initial diagnosisP27D2Pressure Control Solenoid S Stuck OnCheck soonTransmission Issues30–120 minutes for initial diagnosisP27D3Pressure Control Solenoid S ElectricalCheck soonTransmission Issues30–120 minutes for initial diagnosisP27D4Pressure Control Solenoid S IntermittentCheck soonTransmission Issues30–120 minutes for initial diagnosisP27D5Pressure Control Solenoid S” Control Circuit/OpenCheck soonTransmission Issues30–120 minutes for initial diagnosisP27D6Pressure Control Solenoid S Control Circuit Range/PerformanceCheck soonTransmission Issues30–120 minutes for initial diagnosisP27D7Pressure Control Solenoid S Control Circuit LowCheck soonTransmission Issues30–120 minutes for initial diagnosisP27D8Pressure Control Solenoid S Control Circuit HighCheck soonTransmission Issues30–120 minutes for initial diagnosisP27D9Pressure Control Solenoid T Performance/Stuck OffCheck soonTransmission Issues30–120 minutes for initial diagnosisP27DAPressure Control Solenoid T Stuck OnCheck soonTransmission Issues30–120 minutes for initial diagnosisP27DBPressure Control Solenoid T ElectricalCheck soonTransmission Issues30–120 minutes for initial diagnosisP27DCPressure Control Solenoid T IntermittentCheck soonTransmission Issues30–120 minutes for initial diagnosisP27DDPressure Control Solenoid T Control Circuit/OpenCheck soonTransmission Issues30–120 minutes for initial diagnosisP27DEPressure Control Solenoid T Control Circuit Range/PerformanceCheck soonTransmission Issues30–120 minutes for initial diagnosisP27DFPressure Control Solenoid T Control Circuit LowCheck soonTransmission Issues30–120 minutes for initial diagnosisP27E0Pressure Control Solenoid T Control Circuit HighCheck soonTransmission Issues30–120 minutes for initial diagnosisP27E1Electric/Auxiliary Transmission Fluid Pump A Pressure Too LowCheck soonTransmission Issues30–120 minutes for initial diagnosisP27E2Electric/Auxiliary Transmission Fluid Pump B Pressure Too LowCheck soonTransmission Issues30–120 minutes for initial diagnosisP27E3Electric/Auxiliary Transmission Fluid Pump Control Valve Circuit/OpenCheck soonTransmission Issues30–120 minutes for initial diagnosis