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

Sort

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

Quick browse

Choose a vehicle system

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

FiltersSeverity · family

Severity

All severities9253 Low priority305 Check soon8256 Urgent621

Code family

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

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 3937–3960 of 6682

Most searched first

P236CCylinder 12 Pressure Too HighCheck soonEngine Problems30–120 minutes for initial diagnosisP236C relates to cylinder 12 pressure too high. Check the fault conditions and vehicle-specific procedure before replacing parts.P236DCylinder 12 Pressure Variation LowCheck soonEngine Problems30–120 minutes for initial diagnosisP236D relates to cylinder 12 pressure variation low. Check the fault conditions and vehicle-specific procedure before replacing parts.P236ECylinder 12 Pressure Variation HighCheck soonEngine Problems30–120 minutes for initial diagnosisP236E relates to cylinder 12 pressure variation high. Check the fault conditions and vehicle-specific procedure before replacing parts.P236FCylinder 12 Combustion PerformanceCheck soonEngine Problems30–120 minutes for initial diagnosisP236F relates to cylinder 12 combustion performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P2370Fuel Volume Regulator B Control Circuit/OpenCheck soonFuel System30–120 minutes for initial diagnosisP2370 relates to fuel volume regulator b control circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P2371Fuel Volume Regulator B Control Circuit PerformanceCheck soonFuel System30–120 minutes for initial diagnosisP2371 relates to fuel volume regulator b control circuit performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P2372Fuel Volume Regulator B Control Circuit LowCheck soonFuel System30–120 minutes for initial diagnosisP2372 relates to fuel volume regulator b control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P2373Fuel Volume Regulator B Control Circuit HighCheck soonFuel System30–120 minutes for initial diagnosisP2373 relates to fuel volume regulator b control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P2374Turbocharger/Supercharger Inlet Pressure Sensor B CircuitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2374 relates to turbocharger/supercharger inlet pressure sensor b circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P2375Turbocharger/Supercharger Inlet Pressure Sensor B Circuit Range/PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2375 relates to turbocharger/supercharger inlet pressure sensor b circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P2376Turbocharger/Supercharger Inlet Pressure Sensor B Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2376 relates to turbocharger/supercharger inlet pressure sensor b circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P2377Turbocharger/Supercharger Inlet Pressure Sensor B Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2377 relates to turbocharger/supercharger inlet pressure sensor b circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P2378Turbocharger/Supercharger Inlet Pressure Sensor B Circuit Intermittent/ErraticCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2378 relates to turbocharger/supercharger inlet pressure sensor b circuit intermittent/erratic. Check the fault conditions and vehicle-specific procedure before replacing parts.P2379O2 Sensor Out of Range During Deceleration Bank 2 Sensor 2Check soonSensors & Electronics30–120 minutes for initial diagnosisP2379 relates to o2 sensor out of range during deceleration bank 2 sensor 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P237AO2 Sensor Exhaust Sample Error Bank 1 Sensor 2Check soonSensors & Electronics30–120 minutes for initial diagnosisP237A relates to o2 sensor exhaust sample error bank 1 sensor 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P237BO2 Sensor Exhaust Sample Error Bank 2 Sensor 2Check soonSensors & Electronics30–120 minutes for initial diagnosisP237B relates to o2 sensor exhaust sample error bank 2 sensor 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P237CExhaust Heat Exchanger Exhaust Bypass Valve A Control Circuit/OpenCheck soonSensors & Electronics30–120 minutes for initial diagnosisP237C relates to exhaust heat exchanger exhaust bypass valve a control circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P237DExhaust Heat Exchanger Exhaust Bypass Valve A Control Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP237D relates to exhaust heat exchanger exhaust bypass valve a control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P237EExhaust Heat Exchanger Exhaust Bypass Valve A Control Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP237E relates to exhaust heat exchanger exhaust bypass valve a control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P237FExhaust Heat Exchanger Exhaust Bypass Valve A Control PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP237F relates to exhaust heat exchanger exhaust bypass valve a control performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P2380EGR Sensor D CircuitCheck soonEmissions System30–120 minutes for initial diagnosisP2380 relates to egr sensor d circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P2381EGR Sensor D Circuit HighCheck soonEmissions System30–120 minutes for initial diagnosisP2381 relates to egr sensor d circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P2382EGR Sensor D Circuit LowCheck soonEmissions System30–120 minutes for initial diagnosisP2382 relates to egr sensor d circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P2383EGR Sensor D Circuit Range/PerformanceCheck soonEmissions System30–120 minutes for initial diagnosisP2383 relates to egr sensor d circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.