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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

Code family

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 2257–2280 of 8256

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P0938Hydraulic Oil Temperature Sensor Range/PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP0938 relates to hydraulic oil temperature sensor range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P0939Hydraulic Oil Temperature Sensor Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP0939 relates to hydraulic oil temperature sensor circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P093AHydraulic Accumulator Solenoid Circuit/OpenCheck soonSensors & Electronics30–120 minutes for initial diagnosisP093A relates to hydraulic accumulator solenoid circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P093BHydraulic Accumulator Solenoid Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP093B relates to hydraulic accumulator solenoid circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P093CHydraulic Accumulator Solenoid Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP093C relates to hydraulic accumulator solenoid circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P093DHydraulic Accumulator Solenoid PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP093D relates to hydraulic accumulator solenoid performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P0940Hydraulic Oil Temperature Sensor Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP0940 relates to hydraulic oil temperature sensor circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P0941Hydraulic Oil Temperature Sensor Circuit IntermittentCheck soonSensors & Electronics30–120 minutes for initial diagnosisP0941 relates to hydraulic oil temperature sensor circuit intermittent. Check the fault conditions and vehicle-specific procedure before replacing parts.P0942Hydraulic Pressure UnitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP0942 relates to hydraulic pressure unit. Check the fault conditions and vehicle-specific procedure before replacing parts.P0943Hydraulic Pressure Unit Cycling Period Too ShortCheck soonSensors & Electronics30–120 minutes for initial diagnosisP0943 relates to hydraulic pressure unit cycling period too short. Check the fault conditions and vehicle-specific procedure before replacing parts.P0944Hydraulic Pressure Unit Loss of PressureCheck soonSensors & Electronics30–120 minutes for initial diagnosisP0944 relates to hydraulic pressure unit loss of pressure. Check the fault conditions and vehicle-specific procedure before replacing parts.P0945Hydraulic Pump Relay/Control Circuit/OpenCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP0945 relates to hydraulic pump relay/control circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P0946Hydraulic Pump Relay/Control Circuit Range/PerformanceCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP0946 relates to hydraulic pump relay/control circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P0947Hydraulic Pump Relay/Control Circuit LowCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP0947 relates to hydraulic pump relay/control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P0948Hydraulic Pump Relay/Control Circuit HighCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP0948 relates to hydraulic pump relay/control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P0949Auto Shift Manual Adaptive Learning Not CompleteCheck soonTransmission Issues30–120 minutes for initial diagnosisP0949 relates to auto shift manual adaptive learning not complete. Check the fault conditions and vehicle-specific procedure before replacing parts.P094AHydraulic Pump Driver PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP094A relates to hydraulic pump driver performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P094BHydraulic Pump Stuck OnCheck soonSensors & Electronics30–120 minutes for initial diagnosisP094B relates to hydraulic pump stuck on. Check the fault conditions and vehicle-specific procedure before replacing parts.P094CHydraulic Pump Performance/Stuck OffCheck soonSensors & Electronics30–120 minutes for initial diagnosisP094C relates to hydraulic pump performance/stuck off. Check the fault conditions and vehicle-specific procedure before replacing parts.P094EHydraulic Pump Supply Voltage Circuit/OpenCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP094E relates to hydraulic pump supply voltage circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P0950Auto Shift Manual Control CircuitCheck soonTransmission Issues30–120 minutes for initial diagnosisP0950 relates to auto shift manual control circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P0951Auto Shift Manual Control Circuit Range/PerformanceCheck soonTransmission Issues30–120 minutes for initial diagnosisP0951 relates to auto shift manual control circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P0952Auto Shift Manual Control Circuit LowCheck soonTransmission Issues30–120 minutes for initial diagnosisP0952 relates to auto shift manual control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P0953Auto Shift Manual Control Circuit HighCheck soonTransmission Issues30–120 minutes for initial diagnosisP0953 relates to auto shift manual control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.