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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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Severity

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 1–24 of 479

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C0035Left Front Wheel Speed SensorCheck soonChassis & Brakes45–120 minutes for initial diagnosisC0035 means Left Front Wheel Speed Sensor. Review likely symptoms, causes, safety considerations, and a sensible diagnostic order.C0040Right Front Wheel Speed SensorCheck soonChassis & Brakes45–120 minutes for initial diagnosisC0040 means Right Front Wheel Speed Sensor. Review likely symptoms, causes, safety considerations, and a sensible diagnostic order.C0045Left Rear Wheel Speed SensorCheck soonChassis & Brakes45–120 minutes for initial diagnosisC0045 means Left Rear Wheel Speed Sensor. Review likely symptoms, causes, safety considerations, and a sensible diagnostic order.C0050Right Rear Wheel Speed SensorCheck soonChassis & Brakes45–120 minutes for initial diagnosisC0050 means Right Rear Wheel Speed Sensor. Review likely symptoms, causes, safety considerations, and a sensible diagnostic order.C0001TCS Control Channel A Valve 1Check soonChassis & Brakes45–120 minutes for initial diagnosisC0001 concerns tcs control channel a valve 1. Learn what this fault indicates and where to begin diagnosis.C0002TCS Control Channel A Valve 2Check soonChassis & Brakes45–120 minutes for initial diagnosisC0002 concerns tcs control channel a valve 2. Learn what this fault indicates and where to begin diagnosis.C0003TCS Control Channel B Valve 1Check soonChassis & Brakes45–120 minutes for initial diagnosisC0003 concerns tcs control channel b valve 1. Learn what this fault indicates and where to begin diagnosis.C0004TCS Control Channel B Valve 2Check soonChassis & Brakes45–120 minutes for initial diagnosisC0004 concerns tcs control channel b valve 2. Learn what this fault indicates and where to begin diagnosis.C0010Left Front Inlet ControlCheck soonChassis & Brakes45–120 minutes for initial diagnosisC0010 concerns left front inlet control. Learn what this fault indicates and where to begin diagnosis.C0011Left Front Outlet ControlCheck soonChassis & Brakes45–120 minutes for initial diagnosisC0011 concerns left front outlet control. Learn what this fault indicates and where to begin diagnosis.C0012Left Front Hydraulic Release Too LongCheck soonChassis & Brakes45–120 minutes for initial diagnosisC0012 concerns left front hydraulic release too long. Learn what this fault indicates and where to begin diagnosis.C0014Right Front Inlet ControlCheck soonChassis & Brakes45–120 minutes for initial diagnosisC0014 concerns right front inlet control. Learn what this fault indicates and where to begin diagnosis.C0015Right Front Outlet ControlCheck soonChassis & Brakes45–120 minutes for initial diagnosisC0015 concerns right front outlet control. Learn what this fault indicates and where to begin diagnosis.C0016Right Front Hydraulic Release Too LongCheck soonChassis & Brakes45–120 minutes for initial diagnosisC0016 concerns right front hydraulic release too long. Learn what this fault indicates and where to begin diagnosis.C0018Left Rear Inlet ControlCheck soonChassis & Brakes45–120 minutes for initial diagnosisC0018 concerns left rear inlet control. Learn what this fault indicates and where to begin diagnosis.C0019Left Rear Outlet ControlCheck soonChassis & Brakes45–120 minutes for initial diagnosisC0019 concerns left rear outlet control. Learn what this fault indicates and where to begin diagnosis.C001ALeft Rear Hydraulic Release Too LongCheck soonChassis & Brakes45–120 minutes for initial diagnosisC001A concerns left rear hydraulic release too long. Learn what this fault indicates and where to begin diagnosis.C001CRight Rear Inlet ControlCheck soonChassis & Brakes45–120 minutes for initial diagnosisC001C concerns right rear inlet control. Learn what this fault indicates and where to begin diagnosis.C001DRight Rear Outlet ControlCheck soonChassis & Brakes45–120 minutes for initial diagnosisC001D concerns right rear outlet control. Learn what this fault indicates and where to begin diagnosis.C001ERight Rear Hydraulic Release Too LongCheck soonChassis & Brakes45–120 minutes for initial diagnosisC001E concerns right rear hydraulic release too long. Learn what this fault indicates and where to begin diagnosis.C0020ABS Pump Motor ControlCheck soonChassis & Brakes45–120 minutes for initial diagnosisC0020 concerns abs pump motor control. Learn what this fault indicates and where to begin diagnosis.C0021Brake Booster PerformanceUrgentChassis & Brakes45–120 minutes for initial diagnosisC0021 concerns brake booster performance. Learn what this fault indicates and where to begin diagnosis.C0022Brake Booster SolenoidUrgentChassis & Brakes45–120 minutes for initial diagnosisC0022 concerns brake booster solenoid. Learn what this fault indicates and where to begin diagnosis.C0023Stop Lamp ControlCheck soonChassis & Brakes45–120 minutes for initial diagnosisC0023 concerns stop lamp control. Learn what this fault indicates and where to begin diagnosis.