Diagnostic library
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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.
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These are generic OBD2 definitions. Exact make, model, engine, and year compatibility will appear after vehicle-fitment data is added.
Diagnostic codes
Showing 145–168 of 1049
P0388Crankshaft Position Sensor B Circuit HighCheck soonEngine Problems30–120 minutes for initial diagnosisP0389Crankshaft Position Sensor B Circuit IntermittentCheck soonEngine Problems30–120 minutes for initial diagnosisP0390Camshaft Position Sensor B Circuit Bank 2Check soonEngine Problems30–120 minutes for initial diagnosisP0391Camshaft Position Sensor B Circuit Range/Performance Bank 2Check soonEngine Problems30–120 minutes for initial diagnosisP0392Camshaft Position Sensor B Circuit Low Bank 2Check soonEngine Problems30–120 minutes for initial diagnosisP0393Camshaft Position Sensor B Circuit High Bank 2Check soonEngine Problems30–120 minutes for initial diagnosisP0394Camshaft Position Sensor B Circuit Intermittent Bank 2Check soonEngine Problems30–120 minutes for initial diagnosisP0395Cylinder 1 Pressure Sensor CircuitCheck soonEngine Problems30–120 minutes for initial diagnosisP0396Cylinder 1 Pressure Sensor Circuit Range/PerformanceCheck soonEngine Problems30–120 minutes for initial diagnosisP0397Cylinder 1 Pressure Sensor Circuit LowCheck soonEngine Problems30–120 minutes for initial diagnosisP0398Cylinder 1 Pressure Sensor Circuit HighCheck soonEngine Problems30–120 minutes for initial diagnosisP0399Cylinder 1 Pressure Sensor Circuit Intermittent/ErraticCheck soonEngine Problems30–120 minutes for initial diagnosisP039ACylinder 1 Pressure Too LowCheck soonEngine Problems30–120 minutes for initial diagnosisP039BCylinder 1 Pressure Too HighCheck soonEngine Problems30–120 minutes for initial diagnosisP039CCylinder 1 Pressure Variation LowCheck soonEngine Problems30–120 minutes for initial diagnosisP039DCylinder 1 Pressure Variation HighCheck soonEngine Problems30–120 minutes for initial diagnosisP039ECylinder 1 Combustion PerformanceCheck soonEngine Problems30–120 minutes for initial diagnosisP039FCylinder 2 Pressure Sensor CircuitCheck soonEngine Problems30–120 minutes for initial diagnosisP03A0Cylinder 2 Pressure Sensor Circuit Range/PerformanceCheck soonEngine Problems30–120 minutes for initial diagnosisP03A1Cylinder 2 Pressure Sensor Circuit LowCheck soonEngine Problems30–120 minutes for initial diagnosisP03A2Cylinder 2 Pressure Sensor Circuit HighCheck soonEngine Problems30–120 minutes for initial diagnosisP03A3Cylinder 2 Pressure Sensor Circuit Intermittent/ErraticCheck soonEngine Problems30–120 minutes for initial diagnosisP03A4Cylinder 2 Pressure Too LowCheck soonEngine Problems30–120 minutes for initial diagnosisP03A5Cylinder 2 Pressure Too HighCheck soonEngine Problems30–120 minutes for initial diagnosis