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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 1681–1704 of 7353

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P0734Gear 4 Incorrect RatioCheck soonSensors & Electronics30–120 minutes for initial diagnosisP0734 relates to gear 4 incorrect ratio. Check the fault conditions and vehicle-specific procedure before replacing parts.P0735Gear 5 Incorrect RatioCheck soonSensors & Electronics30–120 minutes for initial diagnosisP0735 relates to gear 5 incorrect ratio. Check the fault conditions and vehicle-specific procedure before replacing parts.P0736Reverse Incorrect RatioCheck soonSensors & Electronics30–120 minutes for initial diagnosisP0736 relates to reverse incorrect ratio. Check the fault conditions and vehicle-specific procedure before replacing parts.P0737TCM Engine Speed Output CircuitCheck soonEngine Problems30–120 minutes for initial diagnosisP0737 relates to tcm engine speed output circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P0738TCM Engine Speed Output Circuit LowCheck soonEngine Problems30–120 minutes for initial diagnosisP0738 relates to tcm engine speed output circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P0739TCM Engine Speed Output Circuit HighCheck soonEngine Problems30–120 minutes for initial diagnosisP0739 relates to tcm engine speed output circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P073AStuck in Gear 5Check soonSensors & Electronics30–120 minutes for initial diagnosisP073A relates to stuck in gear 5. Check the fault conditions and vehicle-specific procedure before replacing parts.P073BStuck in Gear 6Check soonSensors & Electronics30–120 minutes for initial diagnosisP073B relates to stuck in gear 6. Check the fault conditions and vehicle-specific procedure before replacing parts.P073CStuck in Gear 7Check soonSensors & Electronics30–120 minutes for initial diagnosisP073C relates to stuck in gear 7. Check the fault conditions and vehicle-specific procedure before replacing parts.P073DUnable to Engage NeutralCheck soonSensors & Electronics30–120 minutes for initial diagnosisP073D relates to unable to engage neutral. Check the fault conditions and vehicle-specific procedure before replacing parts.P073EUnable to Engage ReverseCheck soonSensors & Electronics30–120 minutes for initial diagnosisP073E relates to unable to engage reverse. Check the fault conditions and vehicle-specific procedure before replacing parts.P073FUnable to Engage Gear 1Check soonSensors & Electronics30–120 minutes for initial diagnosisP073F relates to unable to engage gear 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P0740Torque Converter Clutch Circuit MalfunctionTransmission IssuesDiagnose P0740 torque converter clutch code. Learn about TCC operation and what causes lockup problems.P0742Torque Converter Clutch Circuit Stuck OnCheck soonTransmission Issues30–120 minutes for initial diagnosisP0742 relates to torque converter clutch circuit stuck on. Check the fault conditions and vehicle-specific procedure before replacing parts.P0743Torque Converter Clutch Circuit ElectricalCheck soonTransmission Issues30–120 minutes for initial diagnosisP0743 relates to torque converter clutch circuit electrical. Check the fault conditions and vehicle-specific procedure before replacing parts.P0744Torque Converter Clutch Circuit IntermittentCheck soonTransmission Issues30–120 minutes for initial diagnosisP0744 relates to torque converter clutch circuit intermittent. Check the fault conditions and vehicle-specific procedure before replacing parts.P0745Pressure Control Solenoid ACheck soonTransmission Issues30–120 minutes for initial diagnosisP0745 relates to pressure control solenoid a. Check the fault conditions and vehicle-specific procedure before replacing parts.P0746Pressure Control Solenoid A Performance/Stuck OffCheck soonTransmission Issues30–120 minutes for initial diagnosisP0746 relates to pressure control solenoid a performance/stuck off. Check the fault conditions and vehicle-specific procedure before replacing parts.P0747Pressure Control Solenoid A Stuck OnCheck soonTransmission Issues30–120 minutes for initial diagnosisP0747 relates to pressure control solenoid a stuck on. Check the fault conditions and vehicle-specific procedure before replacing parts.P0748Pressure Control Solenoid A ElectricalCheck soonTransmission Issues30–120 minutes for initial diagnosisP0748 relates to pressure control solenoid a electrical. Check the fault conditions and vehicle-specific procedure before replacing parts.P0749Pressure Control Solenoid A IntermittentCheck soonTransmission Issues30–120 minutes for initial diagnosisP0749 relates to pressure control solenoid a intermittent. Check the fault conditions and vehicle-specific procedure before replacing parts.P074AUnable To Engage Gear 2Check soonSensors & Electronics30–120 minutes for initial diagnosisP074A relates to unable to engage gear 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P074BUnable To Engage Gear 3Check soonSensors & Electronics30–120 minutes for initial diagnosisP074B relates to unable to engage gear 3. Check the fault conditions and vehicle-specific procedure before replacing parts.P074CUnable To Engage Gear 4Check soonSensors & Electronics30–120 minutes for initial diagnosisP074C relates to unable to engage gear 4. Check the fault conditions and vehicle-specific procedure before replacing parts.