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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.

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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 121–144 of 1016

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P01D4Cylinder 5 Injection Timing Performance - Over AdvancedCheck soonFuel System30–120 minutes for initial diagnosisP01D4 relates to cylinder 5 injection timing performance - over advanced. Check the fault conditions and vehicle-specific procedure before replacing parts.P01D5Cylinder 6 Injection Timing Performance - Over RetardedCheck soonFuel System30–120 minutes for initial diagnosisP01D5 relates to cylinder 6 injection timing performance - over retarded. Check the fault conditions and vehicle-specific procedure before replacing parts.P01D6Cylinder 6 Injection Timing Performance - Over AdvancedCheck soonFuel System30–120 minutes for initial diagnosisP01D6 relates to cylinder 6 injection timing performance - over advanced. Check the fault conditions and vehicle-specific procedure before replacing parts.P01D7Cylinder 7 Injection Timing Performance - Over RetardedCheck soonFuel System30–120 minutes for initial diagnosisP01D7 relates to cylinder 7 injection timing performance - over retarded. Check the fault conditions and vehicle-specific procedure before replacing parts.P01D8Cylinder 7 Injection Timing Performance - Over AdvancedCheck soonFuel System30–120 minutes for initial diagnosisP01D8 relates to cylinder 7 injection timing performance - over advanced. Check the fault conditions and vehicle-specific procedure before replacing parts.P01D9Cylinder 8 Injection Timing Performance - Over RetardedCheck soonFuel System30–120 minutes for initial diagnosisP01D9 relates to cylinder 8 injection timing performance - over retarded. Check the fault conditions and vehicle-specific procedure before replacing parts.P01DACylinder 8 Injection Timing Performance - Over AdvancedCheck soonFuel System30–120 minutes for initial diagnosisP01DA relates to cylinder 8 injection timing performance - over advanced. Check the fault conditions and vehicle-specific procedure before replacing parts.P01DBCylinder 9 Injection Timing Performance - Over RetardedCheck soonFuel System30–120 minutes for initial diagnosisP01DB relates to cylinder 9 injection timing performance - over retarded. Check the fault conditions and vehicle-specific procedure before replacing parts.P01DCCylinder 9 Injection Timing Performance - Over AdvancedCheck soonFuel System30–120 minutes for initial diagnosisP01DC relates to cylinder 9 injection timing performance - over advanced. Check the fault conditions and vehicle-specific procedure before replacing parts.P01DDCylinder 10 Injection Timing Performance - Over RetardedCheck soonFuel System30–120 minutes for initial diagnosisP01DD relates to cylinder 10 injection timing performance - over retarded. Check the fault conditions and vehicle-specific procedure before replacing parts.P01DECylinder 10 Injection Timing Performance - Over AdvancedCheck soonFuel System30–120 minutes for initial diagnosisP01DE relates to cylinder 10 injection timing performance - over advanced. Check the fault conditions and vehicle-specific procedure before replacing parts.P01DFCylinder 11 Injection Timing Performance - Over RetardedCheck soonFuel System30–120 minutes for initial diagnosisP01DF relates to cylinder 11 injection timing performance - over retarded. Check the fault conditions and vehicle-specific procedure before replacing parts.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.P0200Injector Circuit/OpenCheck soonFuel System45–120 minutes for initial diagnosisP0200 means Injector Circuit/Open. Learn the likely symptoms, common causes, and a safe diagnostic order before replacing parts.P0201Injector Circuit Malfunction Cylinder 1Fuel SystemDiagnose P0201 fuel injector circuit fault on cylinder 1 - wiring, driver, and injector causes plus fixes.P0207Injector Circuit/Open Cylinder 7Check soonFuel System45–120 minutes for initial diagnosisP0207 means Injector Circuit/Open Cylinder 7. Learn the likely symptoms, causes, safety implications, and a practical diagnostic order.P020ACylinder 1 Injection TimingCheck soonFuel System30–120 minutes for initial diagnosisP020A relates to cylinder 1 injection timing. Check the fault conditions and vehicle-specific procedure before replacing parts.P020BCylinder 2 Injection TimingCheck soonFuel System30–120 minutes for initial diagnosisP020B relates to cylinder 2 injection timing. Check the fault conditions and vehicle-specific procedure before replacing parts.P020CCylinder 3 Injection TimingCheck soonFuel System30–120 minutes for initial diagnosisP020C relates to cylinder 3 injection timing. Check the fault conditions and vehicle-specific procedure before replacing parts.P020DCylinder 4 Injection TimingCheck soonFuel System30–120 minutes for initial diagnosisP020D relates to cylinder 4 injection timing. Check the fault conditions and vehicle-specific procedure before replacing parts.P020ECylinder 5 Injection TimingCheck soonFuel System30–120 minutes for initial diagnosisP020E relates to cylinder 5 injection timing. Check the fault conditions and vehicle-specific procedure before replacing parts.P020FCylinder 6 Injection TimingCheck soonFuel System30–120 minutes for initial diagnosisP020F relates to cylinder 6 injection timing. Check the fault conditions and vehicle-specific procedure before replacing parts.