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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.

Transmission Issues P · Powertrain Clear all

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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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Diagnostic codes

Showing 553–576 of 866

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P2799Electric/Auxiliary Transmission Fluid Pump A Control Circuit HighCheck soonTransmission Issues30–120 minutes for initial diagnosisP2799 relates to electric/auxiliary transmission fluid pump a control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P279ATransfer Case Gear High Incorrect RatioCheck soonTransmission Issues30–120 minutes for initial diagnosisP279A relates to transfer case gear high incorrect ratio. Check the fault conditions and vehicle-specific procedure before replacing parts.P279BTransfer Case Gear Low Incorrect RatioCheck soonTransmission Issues30–120 minutes for initial diagnosisP279B relates to transfer case gear low incorrect ratio. Check the fault conditions and vehicle-specific procedure before replacing parts.P279CTransfer Case Gear Neutral Incorrect RatioCheck soonTransmission Issues30–120 minutes for initial diagnosisP279C relates to transfer case gear neutral incorrect ratio. Check the fault conditions and vehicle-specific procedure before replacing parts.P27A1Electric/Auxiliary Transmission Fluid Pump A Stuck OnCheck soonTransmission Issues30–120 minutes for initial diagnosisP27A1 relates to electric/auxiliary transmission fluid pump a stuck on. Check the fault conditions and vehicle-specific procedure before replacing parts.P27A2Electric/Auxiliary Transmission Fluid Pump B Control Circuit/OpenCheck soonTransmission Issues30–120 minutes for initial diagnosisP27A2 relates to electric/auxiliary transmission fluid pump b control circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P27A3Electric/Auxiliary Transmission Fluid Pump B Performance/Stuck OffCheck soonTransmission Issues30–120 minutes for initial diagnosisP27A3 relates to electric/auxiliary transmission fluid pump b performance/stuck off. Check the fault conditions and vehicle-specific procedure before replacing parts.P27A4Electric/Auxiliary Transmission Fluid Pump B Control Circuit LowCheck soonTransmission Issues30–120 minutes for initial diagnosisP27A4 relates to electric/auxiliary transmission fluid pump b control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P27A5Electric/Auxiliary Transmission Fluid Pump B Control Circuit HighCheck soonTransmission Issues30–120 minutes for initial diagnosisP27A5 relates to electric/auxiliary transmission fluid pump b control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P27A6Electric/Auxiliary Transmission Fluid Pump B Stuck OnCheck soonTransmission Issues30–120 minutes for initial diagnosisP27A6 relates to electric/auxiliary transmission fluid pump b stuck on. Check the fault conditions and vehicle-specific procedure before replacing parts.P27A7Pressure Control Solenoid A Data IncompatibleCheck soonTransmission Issues30–120 minutes for initial diagnosisP27A7 relates to pressure control solenoid a data incompatible. Check the fault conditions and vehicle-specific procedure before replacing parts.P27A8Pressure Control Solenoid B Data IncompatibleCheck soonTransmission Issues30–120 minutes for initial diagnosisP27A8 relates to pressure control solenoid b data incompatible. Check the fault conditions and vehicle-specific procedure before replacing parts.P27A9Pressure Control Solenoid C Data IncompatibleCheck soonTransmission Issues30–120 minutes for initial diagnosisP27A9 relates to pressure control solenoid c data incompatible. Check the fault conditions and vehicle-specific procedure before replacing parts.P27AAPressure Control Solenoid D Data IncompatibleCheck soonTransmission Issues30–120 minutes for initial diagnosisP27AA relates to pressure control solenoid d data incompatible. Check the fault conditions and vehicle-specific procedure before replacing parts.P27ABPressure Control Solenoid E Data IncompatibleCheck soonTransmission Issues30–120 minutes for initial diagnosisP27AB relates to pressure control solenoid e data incompatible. Check the fault conditions and vehicle-specific procedure before replacing parts.P27ACPressure Control Solenoid F Data IncompatibleCheck soonTransmission Issues30–120 minutes for initial diagnosisP27AC relates to pressure control solenoid f data incompatible. Check the fault conditions and vehicle-specific procedure before replacing parts.P27ADPressure Control Solenoid G Data IncompatibleCheck soonTransmission Issues30–120 minutes for initial diagnosisP27AD relates to pressure control solenoid g data incompatible. Check the fault conditions and vehicle-specific procedure before replacing parts.P27AEPressure Control Solenoid H Data IncompatibleCheck soonTransmission Issues30–120 minutes for initial diagnosisP27AE relates to pressure control solenoid h data incompatible. Check the fault conditions and vehicle-specific procedure before replacing parts.P27AFPressure Control Solenoid J Data IncompatibleCheck soonTransmission Issues30–120 minutes for initial diagnosisP27AF relates to pressure control solenoid j data incompatible. Check the fault conditions and vehicle-specific procedure before replacing parts.P27B0Pressure Control Solenoid K Data IncompatibleCheck soonTransmission Issues30–120 minutes for initial diagnosisP27B0 relates to pressure control solenoid k data incompatible. Check the fault conditions and vehicle-specific procedure before replacing parts.P27B1Internal Control Module Transmission Range Select PerformanceCheck soonTransmission Issues30–120 minutes for initial diagnosisP27B1 relates to internal control module transmission range select performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P27B2Internal Control Module Transmission Range Control PerformanceCheck soonTransmission Issues30–120 minutes for initial diagnosisP27B2 relates to internal control module transmission range control performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P27B3Internal Control Module Transmission Gear Select PerformanceCheck soonTransmission Issues30–120 minutes for initial diagnosisP27B3 relates to internal control module transmission gear select performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P27B4Internal Control Module Transmission Gear Direction Control PerformanceCheck soonTransmission Issues30–120 minutes for initial diagnosisP27B4 relates to internal control module transmission gear direction control performance. Check the fault conditions and vehicle-specific procedure before replacing parts.