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.

Fuel System 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 241–264 of 1016

Most searched first

P02C3Cylinder 11 - Fuel Trim at Min LimitCheck soonFuel System30–120 minutes for initial diagnosisP02C3 relates to cylinder 11 - fuel trim at min limit. Check the fault conditions and vehicle-specific procedure before replacing parts.P02C4Cylinder 11 - Injector RestrictedCheck soonFuel System30–120 minutes for initial diagnosisP02C4 relates to cylinder 11 - injector restricted. Check the fault conditions and vehicle-specific procedure before replacing parts.P02C5Cylinder 11 - Injector LeakingCheck soonFuel System30–120 minutes for initial diagnosisP02C5 relates to cylinder 11 - injector leaking. Check the fault conditions and vehicle-specific procedure before replacing parts.P02C6Cylinder 12 - Fuel Trim at Max LimitCheck soonFuel System30–120 minutes for initial diagnosisP02C6 relates to cylinder 12 - fuel trim at max limit. Check the fault conditions and vehicle-specific procedure before replacing parts.P02C7Cylinder 12 - Fuel Trim at Min LimitCheck soonFuel System30–120 minutes for initial diagnosisP02C7 relates to cylinder 12 - fuel trim at min limit. Check the fault conditions and vehicle-specific procedure before replacing parts.P02C8Cylinder 12 - Injector RestrictedCheck soonFuel System30–120 minutes for initial diagnosisP02C8 relates to cylinder 12 - injector restricted. Check the fault conditions and vehicle-specific procedure before replacing parts.P02C9Cylinder 12 - Injector LeakingCheck soonFuel System30–120 minutes for initial diagnosisP02C9 relates to cylinder 12 - injector leaking. Check the fault conditions and vehicle-specific procedure before replacing parts.P02CCCylinder 1 Fuel Injector A Offset Learning At Min LimitCheck soonFuel System30–120 minutes for initial diagnosisP02CC relates to cylinder 1 fuel injector a offset learning at min limit. Check the fault conditions and vehicle-specific procedure before replacing parts.P02CDCylinder 1 Fuel Injector A Offset Learning At Max LimitCheck soonFuel System30–120 minutes for initial diagnosisP02CD relates to cylinder 1 fuel injector a offset learning at max limit. Check the fault conditions and vehicle-specific procedure before replacing parts.P02CECylinder 2 Fuel Injector A Offset Learning At Min LimitCheck soonFuel System30–120 minutes for initial diagnosisP02CE relates to cylinder 2 fuel injector a offset learning at min limit. Check the fault conditions and vehicle-specific procedure before replacing parts.P02CFCylinder 2 Fuel Injector A Offset Learning At Max LimitCheck soonFuel System30–120 minutes for initial diagnosisP02CF relates to cylinder 2 fuel injector a offset learning at max limit. Check the fault conditions and vehicle-specific procedure before replacing parts.P02D0Cylinder 3 Fuel Injector A Offset Learning At Min LimitCheck soonFuel System30–120 minutes for initial diagnosisP02D0 relates to cylinder 3 fuel injector a offset learning at min limit. Check the fault conditions and vehicle-specific procedure before replacing parts.P02D1Cylinder 3 Fuel Injector A Offset Learning At Max LimitCheck soonFuel System30–120 minutes for initial diagnosisP02D1 relates to cylinder 3 fuel injector a offset learning at max limit. Check the fault conditions and vehicle-specific procedure before replacing parts.P02D2Cylinder 4 Fuel Injector A Offset Learning At Min LimitCheck soonFuel System30–120 minutes for initial diagnosisP02D2 relates to cylinder 4 fuel injector a offset learning at min limit. Check the fault conditions and vehicle-specific procedure before replacing parts.P02D3Cylinder 4 Fuel Injector A Offset Learning At Max LimitCheck soonFuel System30–120 minutes for initial diagnosisP02D3 relates to cylinder 4 fuel injector a offset learning at max limit. Check the fault conditions and vehicle-specific procedure before replacing parts.P02D4Cylinder 5 Fuel Injector A Offset Learning At Min LimitCheck soonFuel System30–120 minutes for initial diagnosisP02D4 relates to cylinder 5 fuel injector a offset learning at min limit. Check the fault conditions and vehicle-specific procedure before replacing parts.P02D5Cylinder 5 Fuel Injector A Offset Learning At Max LimitCheck soonFuel System30–120 minutes for initial diagnosisP02D5 relates to cylinder 5 fuel injector a offset learning at max limit. Check the fault conditions and vehicle-specific procedure before replacing parts.P02D6Cylinder 6 Fuel Injector A Offset Learning At Min LimitCheck soonFuel System30–120 minutes for initial diagnosisP02D6 relates to cylinder 6 fuel injector a offset learning at min limit. Check the fault conditions and vehicle-specific procedure before replacing parts.P02D7Cylinder 6 Fuel Injector A Offset Learning At Max LimitCheck soonFuel System30–120 minutes for initial diagnosisP02D7 relates to cylinder 6 fuel injector a offset learning at max limit. Check the fault conditions and vehicle-specific procedure before replacing parts.P02D8Cylinder 7 Fuel Injector A Offset Learning At Min LimitCheck soonFuel System30–120 minutes for initial diagnosisP02D8 relates to cylinder 7 fuel injector a offset learning at min limit. Check the fault conditions and vehicle-specific procedure before replacing parts.P02D9Cylinder 7 Fuel Injector A Offset Learning At Max LimitCheck soonFuel System30–120 minutes for initial diagnosisP02D9 relates to cylinder 7 fuel injector a offset learning at max limit. Check the fault conditions and vehicle-specific procedure before replacing parts.P02DACylinder 8 Fuel Injector A Offset Learning At Min LimitCheck soonFuel System30–120 minutes for initial diagnosisP02DA relates to cylinder 8 fuel injector a offset learning at min limit. Check the fault conditions and vehicle-specific procedure before replacing parts.P02DBCylinder 8 Fuel Injector A Offset Learning At Max LimitCheck soonFuel System30–120 minutes for initial diagnosisP02DB relates to cylinder 8 fuel injector a offset learning at max limit. Check the fault conditions and vehicle-specific procedure before replacing parts.P02DCCylinder 9 Fuel Injector A Offset Learning At Min LimitCheck soonFuel System30–120 minutes for initial diagnosisP02DC relates to cylinder 9 fuel injector a offset learning at min limit. Check the fault conditions and vehicle-specific procedure before replacing parts.