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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 4513–4536 of 7353

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P23DCCylinder 3 Fuel Heater PerformanceCheck soonFuel System30–120 minutes for initial diagnosisP23DC relates to cylinder 3 fuel heater performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P23DDCylinder 4 Fuel Heater Control Circuit/OpenCheck soonFuel System30–120 minutes for initial diagnosisP23DD relates to cylinder 4 fuel heater control circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P23DECylinder 4 Fuel Heater Control Circuit HighCheck soonFuel System30–120 minutes for initial diagnosisP23DE relates to cylinder 4 fuel heater control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P23DFCylinder 4 Fuel Heater Control Circuit LowCheck soonFuel System30–120 minutes for initial diagnosisP23DF relates to cylinder 4 fuel heater control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P23E0Cylinder 4 Fuel Heater PerformanceCheck soonFuel System30–120 minutes for initial diagnosisP23E0 relates to cylinder 4 fuel heater performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P23E1EGR C Control Circuit/OpenCheck soonEmissions System30–120 minutes for initial diagnosisP23E1 relates to egr c control circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P23E2EGR C Control Circuit PerformanceCheck soonEmissions System30–120 minutes for initial diagnosisP23E2 relates to egr c control circuit performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P23E3EGR C Control Circuit LowCheck soonEmissions System30–120 minutes for initial diagnosisP23E3 relates to egr c control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P23E4EGR C Control Circuit HighCheck soonEmissions System30–120 minutes for initial diagnosisP23E4 relates to egr c control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P23E5EGR C Control Stuck OpenCheck soonEmissions System30–120 minutes for initial diagnosisP23E5 relates to egr c control stuck open. Check the fault conditions and vehicle-specific procedure before replacing parts.P23E6EGR C Control Stuck ClosedCheck soonEmissions System30–120 minutes for initial diagnosisP23E6 relates to egr c control stuck closed. Check the fault conditions and vehicle-specific procedure before replacing parts.P23E7EGR C Flow Insufficient DetectedCheck soonEmissions System30–120 minutes for initial diagnosisP23E7 relates to egr c flow insufficient detected. Check the fault conditions and vehicle-specific procedure before replacing parts.P23E8EGR C Flow Excessive DetectedCheck soonEmissions System30–120 minutes for initial diagnosisP23E8 relates to egr c flow excessive detected. Check the fault conditions and vehicle-specific procedure before replacing parts.P23E9Camshaft A Position Signal Output Circuit/Open Bank 2Check soonEngine Problems30–120 minutes for initial diagnosisP23E9 relates to camshaft a position signal output circuit/open bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P23EACamshaft A Position Signal Output Circuit Low Bank 2Check soonEngine Problems30–120 minutes for initial diagnosisP23EA relates to camshaft a position signal output circuit low bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P23EBCamshaft A Position Signal Output Circuit High Bank 2Check soonEngine Problems30–120 minutes for initial diagnosisP23EB relates to camshaft a position signal output circuit high bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P23ECCamshaft B Position Signal Output Circuit/Open Bank 1Check soonEngine Problems30–120 minutes for initial diagnosisP23EC relates to camshaft b position signal output circuit/open bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P23EDCamshaft B Position Signal Output Circuit Low Bank 1Check soonEngine Problems30–120 minutes for initial diagnosisP23ED relates to camshaft b position signal output circuit low bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P23EECamshaft B Position Signal Output Circuit High Bank 1Check soonEngine Problems30–120 minutes for initial diagnosisP23EE relates to camshaft b position signal output circuit high bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P23EFCamshaft B Position Signal Output Circuit/Open Bank 2Check soonEngine Problems30–120 minutes for initial diagnosisP23EF relates to camshaft b position signal output circuit/open bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P23F0Camshaft B Position Signal Output Circuit Low Bank 2Check soonEngine Problems30–120 minutes for initial diagnosisP23F0 relates to camshaft b position signal output circuit low bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P23F1Camshaft B Position Signal Output Circuit High Bank 2Check soonEngine Problems30–120 minutes for initial diagnosisP23F1 relates to camshaft b position signal output circuit high bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P23F2Cylinder 1 Injector B Air-Fuel Ratio ImbalanceCheck soonFuel System30–120 minutes for initial diagnosisP23F2 relates to cylinder 1 injector b air-fuel ratio imbalance. Check the fault conditions and vehicle-specific procedure before replacing parts.P23F3Cylinder 2 Injector B Air-Fuel Ratio ImbalanceCheck soonFuel System30–120 minutes for initial diagnosisP23F3 relates to cylinder 2 injector b air-fuel ratio imbalance. Check the fault conditions and vehicle-specific procedure before replacing parts.