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 4153–4176 of 6682

Most searched first

P245DEGR Cooler Bypass Control Circuit High Bank 1Check soonEmissions System30–120 minutes for initial diagnosisP245D relates to egr cooler bypass control circuit high bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P245EParticulate Filter Pressure Sensor B CircuitCheck soonEmissions System30–120 minutes for initial diagnosisP245E relates to particulate filter pressure sensor b circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P245FParticulate Filter Pressure Sensor B Circuit Range/PerformanceCheck soonEmissions System30–120 minutes for initial diagnosisP245F relates to particulate filter pressure sensor b circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P2460Particulate Filter Pressure Sensor B Circuit LowCheck soonEmissions System30–120 minutes for initial diagnosisP2460 relates to particulate filter pressure sensor b circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P2461Particulate Filter Pressure Sensor B Circuit HighCheck soonEmissions System30–120 minutes for initial diagnosisP2461 relates to particulate filter pressure sensor b circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P2462Particulate Filter Pressure Sensor B Circuit Intermittent/ErraticCheck soonEmissions System30–120 minutes for initial diagnosisP2462 relates to particulate filter pressure sensor b circuit intermittent/erratic. Check the fault conditions and vehicle-specific procedure before replacing parts.P2463Particulate Filter Restriction - Soot Accumulation Bank 1Check soonEmissions System30–120 minutes for initial diagnosisP2463 relates to particulate filter restriction - soot accumulation bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P2464Particulate Filter Differential Pressure Too Low Bank 2Check soonEmissions System30–120 minutes for initial diagnosisP2464 relates to particulate filter differential pressure too low bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P2465Particulate Filter Differential Pressure Too High Bank 2Check soonEmissions System30–120 minutes for initial diagnosisP2465 relates to particulate filter differential pressure too high bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P2466Exhaust Gas Temperature Sensor Circuit Bank 2 Sensor 3Check soonEmissions System30–120 minutes for initial diagnosisP2466 relates to exhaust gas temperature sensor circuit bank 2 sensor 3. Check the fault conditions and vehicle-specific procedure before replacing parts.P2467Exhaust Gas Temperature Sensor Circuit Range/Performance Bank 2 Sensor 3Check soonEmissions System30–120 minutes for initial diagnosisP2467 relates to exhaust gas temperature sensor circuit range/performance bank 2 sensor 3. Check the fault conditions and vehicle-specific procedure before replacing parts.P2468Exhaust Gas Temperature Sensor Circuit Low Bank 2 Sensor 3Check soonEmissions System30–120 minutes for initial diagnosisP2468 relates to exhaust gas temperature sensor circuit low bank 2 sensor 3. Check the fault conditions and vehicle-specific procedure before replacing parts.P2469Exhaust Gas Temperature Sensor Circuit High Bank 2 Sensor 3Check soonEmissions System30–120 minutes for initial diagnosisP2469 relates to exhaust gas temperature sensor circuit high bank 2 sensor 3. Check the fault conditions and vehicle-specific procedure before replacing parts.P246AExhaust Gas Temperature Sensor Circuit Intermittent/Erratic Bank 2 Sensor 3Check soonEmissions System30–120 minutes for initial diagnosisP246A relates to exhaust gas temperature sensor circuit intermittent/erratic bank 2 sensor 3. Check the fault conditions and vehicle-specific procedure before replacing parts.P246BVehicle Conditions Incorrect for Particulate Filter RegenerationCheck soonEmissions System30–120 minutes for initial diagnosisP246B relates to vehicle conditions incorrect for particulate filter regeneration. Check the fault conditions and vehicle-specific procedure before replacing parts.P246CParticulate Filter Restriction - Forced Limited Power Bank 1Check soonEmissions System30–120 minutes for initial diagnosisP246C relates to particulate filter restriction - forced limited power bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P246DParticulate Filter Pressure Sensor A/B CorrelationCheck soonEmissions System30–120 minutes for initial diagnosisP246D relates to particulate filter pressure sensor a/b correlation. Check the fault conditions and vehicle-specific procedure before replacing parts.P246EExhaust Gas Temperature Sensor Circuit Bank 1 Sensor 4Check soonEmissions System30–120 minutes for initial diagnosisP246E relates to exhaust gas temperature sensor circuit bank 1 sensor 4. Check the fault conditions and vehicle-specific procedure before replacing parts.P246FExhaust Gas Temperature Sensor Circuit Range/Performance Bank 1 Sensor 4Check soonEmissions System30–120 minutes for initial diagnosisP246F relates to exhaust gas temperature sensor circuit range/performance bank 1 sensor 4. Check the fault conditions and vehicle-specific procedure before replacing parts.P2470Exhaust Gas Temperature Sensor Circuit Low Bank 1 Sensor 4Check soonEmissions System30–120 minutes for initial diagnosisP2470 relates to exhaust gas temperature sensor circuit low bank 1 sensor 4. Check the fault conditions and vehicle-specific procedure before replacing parts.P2471Exhaust Gas Temperature Sensor Circuit High Bank 1 Sensor 4Check soonEmissions System30–120 minutes for initial diagnosisP2471 relates to exhaust gas temperature sensor circuit high bank 1 sensor 4. Check the fault conditions and vehicle-specific procedure before replacing parts.P2472Exhaust Gas Temperature Sensor Circuit Intermittent/Erratic Bank 1 Sensor 4Check soonEmissions System30–120 minutes for initial diagnosisP2472 relates to exhaust gas temperature sensor circuit intermittent/erratic bank 1 sensor 4. Check the fault conditions and vehicle-specific procedure before replacing parts.P2473Exhaust Gas Temperature Sensor Circuit Bank 2 Sensor 4Check soonEmissions System30–120 minutes for initial diagnosisP2473 relates to exhaust gas temperature sensor circuit bank 2 sensor 4. Check the fault conditions and vehicle-specific procedure before replacing parts.P2474Exhaust Gas Temperature Sensor Circuit Range/Performance Bank 2 Sensor 4Check soonEmissions System30–120 minutes for initial diagnosisP2474 relates to exhaust gas temperature sensor circuit range/performance bank 2 sensor 4. Check the fault conditions and vehicle-specific procedure before replacing parts.