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9,253 diagnostic guides

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Find codes by symptomChoose what you notice to search matching code guides.

Rough idle or shakingVibration while stopped Hard to startLong cranking or no-start Engine stallsCuts out at idle or on the road Hesitates or loses powerSlow response when accelerating Battery light is onCharging system warning Harsh gear changesDelayed or rough shifting

A symptom can have several causes. Treat matching codes as clues and follow the diagnostic checks in each guide.

Check soon P · Powertrain Clear all

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Engine1049 Emissions515 Fuel1016 Sensors & Electronics2110 Transmission866 Electrical & Charging1797 Body & Restraints193 Chassis & Brakes479 Network & Communication1228

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All severities9253 Low priority305 Check soon8256 Urgent621

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All families9253 P · Powertrain7353 B · Body193 C · Chassis479 U · Network1228

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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 337–360 of 6682

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P01E0Cylinder 11 Injection Timing Performance - Over AdvancedCheck soonFuel System30–120 minutes for initial diagnosisP01E0 relates to cylinder 11 injection timing performance - over advanced. Check the fault conditions and vehicle-specific procedure before replacing parts.P01E1Cylinder 12 Injection Timing Performance - Over RetardedCheck soonFuel System30–120 minutes for initial diagnosisP01E1 relates to cylinder 12 injection timing performance - over retarded. Check the fault conditions and vehicle-specific procedure before replacing parts.P01E2Cylinder 12 Injection Timing Performance - Over AdvancedCheck soonFuel System30–120 minutes for initial diagnosisP01E2 relates to cylinder 12 injection timing performance - over advanced. Check the fault conditions and vehicle-specific procedure before replacing parts.P01E3Engine Coolant Temperature Sensor 3 CircuitCheck soonEngine Problems30–120 minutes for initial diagnosisP01E3 relates to engine coolant temperature sensor 3 circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P01E4Engine Coolant Temperature Sensor 3 Circuit Range/PerformanceCheck soonEngine Problems30–120 minutes for initial diagnosisP01E4 relates to engine coolant temperature sensor 3 circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P01E5Engine Coolant Temperature Sensor 3 Circuit LowCheck soonEngine Problems30–120 minutes for initial diagnosisP01E5 relates to engine coolant temperature sensor 3 circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P01E6Engine Coolant Temperature Sensor 3 Circuit HighCheck soonEngine Problems30–120 minutes for initial diagnosisP01E6 relates to engine coolant temperature sensor 3 circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P01E7Engine Coolant Temperature Sensor 3 Circuit Intermittent/ErraticCheck soonEngine Problems30–120 minutes for initial diagnosisP01E7 relates to engine coolant temperature sensor 3 circuit intermittent/erratic. Check the fault conditions and vehicle-specific procedure before replacing parts.P01E8Engine Coolant Heater A Control Circuit/OpenCheck soonEngine Problems30–120 minutes for initial diagnosisP01E8 relates to engine coolant heater a control circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P01E9Engine Coolant Heater A Control Circuit LowCheck soonEngine Problems30–120 minutes for initial diagnosisP01E9 relates to engine coolant heater a control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P01EAEngine Coolant Heater A Control Circuit HighCheck soonEngine Problems30–120 minutes for initial diagnosisP01EA relates to engine coolant heater a control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P01EBEngine Coolant Heater A Control Circuit PerformanceCheck soonEngine Problems30–120 minutes for initial diagnosisP01EB relates to engine coolant heater a control circuit performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P01ECEngine Coolant Heater B Control Circuit/OpenCheck soonEngine Problems30–120 minutes for initial diagnosisP01EC relates to engine coolant heater b control circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P01EDEngine Coolant Heater B Control Circuit LowCheck soonEngine Problems30–120 minutes for initial diagnosisP01ED relates to engine coolant heater b control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P01EEEngine Coolant Heater B Control Circuit HighCheck soonEngine Problems30–120 minutes for initial diagnosisP01EE relates to engine coolant heater b control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P01EFEngine Coolant Heater B Control Circuit PerformanceCheck soonEngine Problems30–120 minutes for initial diagnosisP01EF relates to engine coolant heater b control circuit performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P01F0Coolant Temperature Relapsed Below Diagnostic Monitoring TemperatureCheck soonEngine Problems30–120 minutes for initial diagnosisP01F0 relates to coolant temperature relapsed below diagnostic monitoring temperature. Check the fault conditions and vehicle-specific procedure before replacing parts.P01F1O2 Sensor Circuit Bank 1 Sensor 4Check soonSensors & Electronics30–120 minutes for initial diagnosisP01F1 relates to o2 sensor circuit bank 1 sensor 4. Check the fault conditions and vehicle-specific procedure before replacing parts.P01F2O2 Sensor Circuit Low Voltage Bank 1 Sensor 4Check soonElectrical & Charging System30–120 minutes for initial diagnosisP01F2 relates to o2 sensor circuit low voltage bank 1 sensor 4. Check the fault conditions and vehicle-specific procedure before replacing parts.P01F3O2 Sensor Circuit High Voltage Bank 1 Sensor 4Check soonElectrical & Charging System30–120 minutes for initial diagnosisP01F3 relates to o2 sensor circuit high voltage bank 1 sensor 4. Check the fault conditions and vehicle-specific procedure before replacing parts.P01F4O2 Sensor Circuit Slow Response Bank 1 Sensor 4Check soonSensors & Electronics30–120 minutes for initial diagnosisP01F4 relates to o2 sensor circuit slow response bank 1 sensor 4. Check the fault conditions and vehicle-specific procedure before replacing parts.P01F5O2 Sensor Circuit No Activity Detected Bank 1 Sensor 4Check soonSensors & Electronics30–120 minutes for initial diagnosisP01F5 relates to o2 sensor circuit no activity detected bank 1 sensor 4. Check the fault conditions and vehicle-specific procedure before replacing parts.P01F6O2 Sensor Signal Biased/Stuck Lean Bank 1 Sensor 4Check soonSensors & Electronics30–120 minutes for initial diagnosisP01F6 relates to o2 sensor signal biased/stuck lean bank 1 sensor 4. Check the fault conditions and vehicle-specific procedure before replacing parts.P01F7O2 Sensor Signal Biased/Stuck Rich Bank 1 Sensor 4Check soonSensors & Electronics30–120 minutes for initial diagnosisP01F7 relates to o2 sensor signal biased/stuck rich bank 1 sensor 4. Check the fault conditions and vehicle-specific procedure before replacing parts.