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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

FiltersSeverity · family

Severity

All severities9253 Low priority305 Check soon8256 Urgent621

Code family

All families9253 P · Powertrain7353 B · Body193 C · Chassis479 U · Network1228

Vehicle coverage

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

Diagnostic codes

Showing 9073–9096 of 9253

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P0094Fuel System Leak Detected — Small LeakCheck soonFuel System45–120 minutes for initial diagnosisP0094 means Fuel System Leak Detected — Small Leak. Learn the likely symptoms, causes, safety implications, and a practical diagnostic order.P0095Intake Air Temperature Sensor 2 CircuitCheck soonSensors & Electronics45–120 minutes for initial diagnosisP0095 means Intake Air Temperature Sensor 2 Circuit. Learn the likely symptoms, causes, safety implications, and a practical diagnostic order.P0096Intake Air Temperature Sensor 2 Circuit Range/PerformanceCheck soonSensors & Electronics45–120 minutes for initial diagnosisP0096 means Intake Air Temperature Sensor 2 Circuit Range/Performance. Learn the likely symptoms, causes, safety implications, and a practical diagnostic order.P0097Intake Air Temperature Sensor 2 Circuit LowCheck soonSensors & Electronics45–120 minutes for initial diagnosisP0097 means Intake Air Temperature Sensor 2 Circuit Low. Learn the likely symptoms, causes, safety implications, and a practical diagnostic order.P0098Intake Air Temperature Sensor 2 Circuit HighCheck soonSensors & Electronics45–120 minutes for initial diagnosisP0098 means Intake Air Temperature Sensor 2 Circuit High. Learn the likely symptoms, causes, safety implications, and a practical diagnostic order.P0099Intake Air Temperature Sensor 2 Circuit IntermittentCheck soonSensors & Electronics45–120 minutes for initial diagnosisP0099 means Intake Air Temperature Sensor 2 Circuit Intermittent. Learn the likely symptoms, causes, safety implications, and a practical diagnostic order.P0103Mass or Volume Air Flow Circuit High InputCheck soonSensors & Electronics45–120 minutes for initial diagnosisP0103 means Mass or Volume Air Flow Circuit High Input. Learn the likely symptoms, common causes, and a safe diagnostic order before replacing parts.P0104Mass or Volume Air Flow Circuit IntermittentCheck soonSensors & Electronics45–120 minutes for initial diagnosisP0104 means Mass or Volume Air Flow Circuit Intermittent. Learn the likely symptoms, common causes, and a safe diagnostic order before replacing parts.P0107Manifold Absolute Pressure/Barometric Pressure Circuit Low InputCheck soonSensors & Electronics45–120 minutes for initial diagnosisP0107 means Manifold Absolute Pressure/Barometric Pressure Circuit Low Input. Learn the likely symptoms, common causes, and a safe diagnostic order before replacing parts.P0108Manifold Absolute Pressure/Barometric Pressure Circuit High InputCheck soonSensors & Electronics45–120 minutes for initial diagnosisP0108 means Manifold Absolute Pressure/Barometric Pressure Circuit High Input. Learn the likely symptoms, common causes, and a safe diagnostic order before replacing parts.P0109Manifold Absolute Pressure/Barometric Pressure Circuit IntermittentCheck soonSensors & Electronics45–120 minutes for initial diagnosisP0109 means Manifold Absolute Pressure/Barometric Pressure Circuit Intermittent. Learn the likely symptoms, common causes, and a safe diagnostic order before replacing parts.P0110Intake Air Temperature Sensor 1 CircuitCheck soonSensors & Electronics45–120 minutes for initial diagnosisP0110 means Intake Air Temperature Sensor 1 Circuit. Learn the likely symptoms, common causes, and a safe diagnostic order before replacing parts.P0111Intake Air Temperature Sensor 1 Circuit Range/PerformanceCheck soonSensors & Electronics45–120 minutes for initial diagnosisP0111 means Intake Air Temperature Sensor 1 Circuit Range/Performance. Learn the likely symptoms, common causes, and a safe diagnostic order before replacing parts.P0112Intake Air Temperature Sensor 1 Circuit LowCheck soonSensors & Electronics45–120 minutes for initial diagnosisP0112 means Intake Air Temperature Sensor 1 Circuit Low. Learn the likely symptoms, common causes, and a safe diagnostic order before replacing parts.P0113Intake Air Temperature Sensor High InputSensors & ElectronicsFix P0113 IAT sensor code. Learn about intake air temperature sensor problems and solutions.P0117Engine Coolant Temperature Sensor Low InputSensors & ElectronicsDiagnose P0117 coolant temperature sensor code. Learn why the ECT reads low and how to test and replace it.P0119Engine Coolant Temperature Sensor 1 Circuit IntermittentCheck soonSensors & Electronics45–120 minutes for initial diagnosisP0119 means Engine Coolant Temperature Sensor 1 Circuit Intermittent. Learn the likely symptoms, common causes, and a safe diagnostic order before replacing parts.P0122Throttle/Pedal Position Sensor A Circuit Low InputSensors & ElectronicsDiagnose P0122 throttle position sensor code. Learn why the TPS reads low and how to test and replace it.P0123Throttle/Pedal Position Sensor/Switch A Circuit High InputCheck soonSensors & Electronics45–120 minutes for initial diagnosisP0123 means Throttle/Pedal Position Sensor/Switch A Circuit High Input. Learn the likely symptoms, common causes, and a safe diagnostic order before replacing parts.P0124Throttle/Pedal Position Sensor/Switch A Circuit IntermittentCheck soonSensors & Electronics45–120 minutes for initial diagnosisP0124 means Throttle/Pedal Position Sensor/Switch A Circuit Intermittent. Learn the likely symptoms, common causes, and a safe diagnostic order before replacing parts.P0137Oxygen Sensor Circuit Low Voltage Bank 1 Sensor 2Low prioritySensors & Electronics30–90 minutes for initial diagnosisP0137 means Oxygen Sensor Circuit Low Voltage Bank 1 Sensor 2. Learn the likely symptoms, common causes, and a safe diagnostic order before replacing parts.P0138Oxygen Sensor Circuit High Voltage Bank 1 Sensor 2Low prioritySensors & Electronics30–90 minutes for initial diagnosisP0138 means Oxygen Sensor Circuit High Voltage Bank 1 Sensor 2. Learn the likely symptoms, common causes, and a safe diagnostic order before replacing parts.P0139Oxygen Sensor Circuit Slow Response Bank 1 Sensor 2Low prioritySensors & Electronics30–90 minutes for initial diagnosisP0139 means Oxygen Sensor Circuit Slow Response Bank 1 Sensor 2. Learn the likely symptoms, common causes, and a safe diagnostic order before replacing parts.P0143Oxygen Sensor Circuit Low Voltage Bank 1 Sensor 3Check soonEmissions System45–120 minutes for initial diagnosisP0143 means Oxygen Sensor Circuit Low Voltage Bank 1 Sensor 3. Learn the likely symptoms, causes, safety implications, and a practical diagnostic order.