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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.

Urgent C · Chassis 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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These are generic OBD2 definitions. Exact make, model, engine, and year compatibility will appear after vehicle-fitment data is added.

Diagnostic codes

Showing 97–120 of 212

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C05A1Brake Pressure Sensor E Circuit/OpenUrgentChassis & Brakes45–120 minutes for initial diagnosisC05A1 concerns brake pressure sensor e circuit/open. Learn what this fault indicates and where to begin diagnosis.C05A2Brake Pressure Sensor E Range/PerformanceUrgentChassis & Brakes45–120 minutes for initial diagnosisC05A2 concerns brake pressure sensor e range/performance. Learn what this fault indicates and where to begin diagnosis.C05ABBrake Blending Separation Valve PerformanceUrgentChassis & Brakes45–120 minutes for initial diagnosisC05AB concerns brake blending separation valve performance. Learn what this fault indicates and where to begin diagnosis.C05ACBrake Blending Separation Valve Stuck ClosedUrgentChassis & Brakes45–120 minutes for initial diagnosisC05AC concerns brake blending separation valve stuck closed. Learn what this fault indicates and where to begin diagnosis.C05ADBrake Blending System PerformanceUrgentChassis & Brakes45–120 minutes for initial diagnosisC05AD concerns brake blending system performance. Learn what this fault indicates and where to begin diagnosis.C05AFBrake Booster Motor B Current Sensor Circuit Range/PerformanceUrgentChassis & Brakes45–120 minutes for initial diagnosisC05AF concerns brake booster motor b current sensor circuit range/performance. Learn what this fault indicates and where to begin diagnosis.C05B0Brake Hydraulic Circuit C LeakUrgentChassis & Brakes45–120 minutes for initial diagnosisC05B0 concerns brake hydraulic circuit c leak. Learn what this fault indicates and where to begin diagnosis.C05B1Brake Hydraulic Circuit D LeakUrgentChassis & Brakes45–120 minutes for initial diagnosisC05B1 concerns brake hydraulic circuit d leak. Learn what this fault indicates and where to begin diagnosis.C05B2Steering Wheel Angle Sensor Signal - Yaw Rate Sensor Signal CorrelationUrgentChassis & Brakes45–120 minutes for initial diagnosisC05B2 concerns steering wheel angle sensor signal - yaw rate sensor signal correlation. Learn what this fault indicates and where to begin diagnosis.C05B3Brake Booster Temperature Sensor C Circuit LowUrgentChassis & Brakes45–120 minutes for initial diagnosisC05B3 concerns brake booster temperature sensor c circuit low. Learn what this fault indicates and where to begin diagnosis.C05B4Brake Booster Temperature Sensor C Circuit HighUrgentChassis & Brakes45–120 minutes for initial diagnosisC05B4 concerns brake booster temperature sensor c circuit high. Learn what this fault indicates and where to begin diagnosis.C05B5Brake Booster Temperature Sensor C Circuit/OpenUrgentChassis & Brakes45–120 minutes for initial diagnosisC05B5 concerns brake booster temperature sensor c circuit/open. Learn what this fault indicates and where to begin diagnosis.C05B6Brake Booster Temperature Sensor C Circuit Range/PerformanceUrgentChassis & Brakes45–120 minutes for initial diagnosisC05B6 concerns brake booster temperature sensor c circuit range/performance. Learn what this fault indicates and where to begin diagnosis.C05B7Brake Booster Temperature Sensor C Circuit Intermittent/ErraticUrgentChassis & Brakes45–120 minutes for initial diagnosisC05B7 concerns brake booster temperature sensor c circuit intermittent/erratic. Learn what this fault indicates and where to begin diagnosis.C05B8Brake Booster Motor A Position Sensor Supply Circuit/OpenUrgentChassis & Brakes45–120 minutes for initial diagnosisC05B8 concerns brake booster motor a position sensor supply circuit/open. Learn what this fault indicates and where to begin diagnosis.C05B9Brake Booster Motor A Position Sensor Supply Circuit LowUrgentChassis & Brakes45–120 minutes for initial diagnosisC05B9 concerns brake booster motor a position sensor supply circuit low. Learn what this fault indicates and where to begin diagnosis.C05BABrake Booster Motor A Position Sensor Supply Circuit HighUrgentChassis & Brakes45–120 minutes for initial diagnosisC05BA concerns brake booster motor a position sensor supply circuit high. Learn what this fault indicates and where to begin diagnosis.C05BBBrake Booster Motor A Position Sensor Supply Circuit Range/PerformanceUrgentChassis & Brakes45–120 minutes for initial diagnosisC05BB concerns brake booster motor a position sensor supply circuit range/performance. Learn what this fault indicates and where to begin diagnosis.C05BCBrake Booster Motor B Position Sensor Supply Circuit/OpenUrgentChassis & Brakes45–120 minutes for initial diagnosisC05BC concerns brake booster motor b position sensor supply circuit/open. Learn what this fault indicates and where to begin diagnosis.C05BDBrake Booster Motor B Position Sensor Supply Circuit LowUrgentChassis & Brakes45–120 minutes for initial diagnosisC05BD concerns brake booster motor b position sensor supply circuit low. Learn what this fault indicates and where to begin diagnosis.C05BEBrake Booster Motor B Position Sensor Supply Circuit HighUrgentChassis & Brakes45–120 minutes for initial diagnosisC05BE concerns brake booster motor b position sensor supply circuit high. Learn what this fault indicates and where to begin diagnosis.C05BFBrake Booster Motor B Position Sensor Supply Circuit Range/PerformanceUrgentChassis & Brakes45–120 minutes for initial diagnosisC05BF concerns brake booster motor b position sensor supply circuit range/performance. Learn what this fault indicates and where to begin diagnosis.C05C0Brake Pedal Position Sensor A Not LearnedUrgentChassis & Brakes45–120 minutes for initial diagnosisC05C0 concerns brake pedal position sensor a not learned. Learn what this fault indicates and where to begin diagnosis.C05C1Brake Pedal Position Sensor B Not LearnedUrgentChassis & Brakes45–120 minutes for initial diagnosisC05C1 concerns brake pedal position sensor b not learned. Learn what this fault indicates and where to begin diagnosis.