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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 1777–1800 of 1939

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P2D1FReductant System Flow – RestrictedCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2D1F relates to reductant system flow – restricted. Check the fault conditions and vehicle-specific procedure before replacing parts.P2D20Reductant System Flow – BlockedCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2D20 relates to reductant system flow – blocked. Check the fault conditions and vehicle-specific procedure before replacing parts.P2D21Turbocharger Interstage Pressure Sensor A CircuitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2D21 relates to turbocharger interstage pressure sensor a circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P2D22Turbocharger Interstage Pressure Sensor A Circuit Range/PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2D22 relates to turbocharger interstage pressure sensor a circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P2D23Turbocharger Interstage Pressure Sensor A Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2D23 relates to turbocharger interstage pressure sensor a circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P2D24Turbocharger Interstage Pressure Sensor A Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2D24 relates to turbocharger interstage pressure sensor a circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P2D25Turbocharger Interstage Pressure Sensor A Circuit Intermittent/ErraticCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2D25 relates to turbocharger interstage pressure sensor a circuit intermittent/erratic. Check the fault conditions and vehicle-specific procedure before replacing parts.P2D28Cold Start Propulsion Torque PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2D28 relates to cold start propulsion torque performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P2D29A/C Compressor Motor StalledCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2D29 relates to a/c compressor motor stalled. Check the fault conditions and vehicle-specific procedure before replacing parts.P2D2DCold Start Intake Manifold Runner Performance Bank 1Check soonSensors & Electronics30–120 minutes for initial diagnosisP2D2D relates to cold start intake manifold runner performance bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P2D2ECold Start Intake Manifold Runner Performance Bank 2Check soonSensors & Electronics30–120 minutes for initial diagnosisP2D2E relates to cold start intake manifold runner performance bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P2D2FCold Start Turbocharger/Supercharger A UnderboostCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2D2F relates to cold start turbocharger/supercharger a underboost. Check the fault conditions and vehicle-specific procedure before replacing parts.P2D30Cold Start Turbocharger/Supercharger A OverboostCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2D30 relates to cold start turbocharger/supercharger a overboost. Check the fault conditions and vehicle-specific procedure before replacing parts.P2D31Intake Manifold Tuning Valve Exceeded Learning Limit Bank 1Check soonSensors & Electronics30–120 minutes for initial diagnosisP2D31 relates to intake manifold tuning valve exceeded learning limit bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P2D32Intake Manifold Tuning Valve Control Circuit Driver Current/Temperature Too High Bank 1Check soonSensors & Electronics30–120 minutes for initial diagnosisP2D32 relates to intake manifold tuning valve control circuit driver current/temperature too high bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P2D3AForced Hybrid/EV System ShutdownCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2D3A relates to forced hybrid/ev system shutdown. Check the fault conditions and vehicle-specific procedure before replacing parts.P2D3BHybrid/EV Discharge System FaultCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2D3B relates to hybrid/ev discharge system fault. Check the fault conditions and vehicle-specific procedure before replacing parts.P2D3CCold Start Hybrid/EV Drive Motor PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2D3C relates to cold start hybrid/ev drive motor performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P2D3DCold Start Hybrid/EV Drive Motor Inverter Torque PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2D3D relates to cold start hybrid/ev drive motor inverter torque performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P2D44A/C Compressor Motor PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2D44 relates to a/c compressor motor performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P2D45Reductant Temperature Too LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2D45 relates to reductant temperature too low. Check the fault conditions and vehicle-specific procedure before replacing parts.P2D5AReductant Level Sensor A/B CorrelationCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2D5A relates to reductant level sensor a/b correlation. Check the fault conditions and vehicle-specific procedure before replacing parts.P2DA8DC/AC Converter Control Module A Switch A CircuitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2DA8 relates to dc/ac converter control module a switch a circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P2DA9DC/AC Converter Control Module A Switch A Circuit Range/PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2DA9 relates to dc/ac converter control module a switch a circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.