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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.

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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 8137–8160 of 8256

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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.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.P0144Oxygen Sensor Circuit High Voltage Bank 1 Sensor 3Check soonEmissions System45–120 minutes for initial diagnosisP0144 means Oxygen Sensor Circuit High Voltage Bank 1 Sensor 3. Learn the likely symptoms, causes, safety implications, and a practical diagnostic order.P0145Oxygen Sensor Circuit Slow Response Bank 1 Sensor 3Check soonEmissions System45–120 minutes for initial diagnosisP0145 means Oxygen Sensor Circuit Slow Response Bank 1 Sensor 3. Learn the likely symptoms, causes, safety implications, and a practical diagnostic order.P0146Oxygen Sensor Circuit No Activity Detected Bank 1 Sensor 3Check soonEmissions System45–120 minutes for initial diagnosisP0146 means Oxygen Sensor Circuit No Activity Detected Bank 1 Sensor 3. Learn the likely symptoms, causes, safety implications, and a practical diagnostic order.P0147Oxygen Sensor Heater Circuit Bank 1 Sensor 3Check soonEmissions System45–120 minutes for initial diagnosisP0147 means Oxygen Sensor Heater Circuit Bank 1 Sensor 3. Learn the likely symptoms, causes, safety implications, and a practical diagnostic order.P0160Oxygen Sensor Circuit No Activity Detected Bank 2 Sensor 2Check soonEmissions System45–120 minutes for initial diagnosisP0160 means Oxygen Sensor Circuit No Activity Detected Bank 2 Sensor 2. Learn the likely symptoms, causes, safety implications, and a practical diagnostic order.P0162Oxygen Sensor Circuit Bank 2 Sensor 3Check soonEmissions System45–120 minutes for initial diagnosisP0162 means Oxygen Sensor Circuit Bank 2 Sensor 3. Learn the likely symptoms, causes, safety implications, and a practical diagnostic order.P0163Oxygen Sensor Circuit Low Voltage Bank 2 Sensor 3Check soonEmissions System45–120 minutes for initial diagnosisP0163 means Oxygen Sensor Circuit Low Voltage Bank 2 Sensor 3. Learn the likely symptoms, causes, safety implications, and a practical diagnostic order.P0164Oxygen Sensor Circuit High Voltage Bank 2 Sensor 3Check soonEmissions System45–120 minutes for initial diagnosisP0164 means Oxygen Sensor Circuit High Voltage Bank 2 Sensor 3. Learn the likely symptoms, causes, safety implications, and a practical diagnostic order.P0165Oxygen Sensor Circuit Slow Response Bank 2 Sensor 3Check soonEmissions System45–120 minutes for initial diagnosisP0165 means Oxygen Sensor Circuit Slow Response Bank 2 Sensor 3. Learn the likely symptoms, causes, safety implications, and a practical diagnostic order.P0166Oxygen Sensor Circuit No Activity Detected Bank 2 Sensor 3Check soonEmissions System45–120 minutes for initial diagnosisP0166 means Oxygen Sensor Circuit No Activity Detected Bank 2 Sensor 3. Learn the likely symptoms, causes, safety implications, and a practical diagnostic order.P0167Oxygen Sensor Heater Circuit Bank 2 Sensor 3Check soonEmissions System45–120 minutes for initial diagnosisP0167 means Oxygen Sensor Heater Circuit Bank 2 Sensor 3. Learn the likely symptoms, causes, safety implications, and a practical diagnostic order.P0191Fuel Rail Pressure Sensor A Circuit Range/PerformanceCheck soonFuel System45–120 minutes for initial diagnosisP0191 means Fuel Rail Pressure Sensor A Circuit Range/Performance. Learn the likely symptoms, common causes, and a safe diagnostic order before replacing parts.P0192Fuel Rail Pressure Sensor A Circuit LowCheck soonFuel System45–120 minutes for initial diagnosisP0192 means Fuel Rail Pressure Sensor A Circuit Low. Learn the likely symptoms, common causes, and a safe diagnostic order before replacing parts.P0193Fuel Rail Pressure Sensor A Circuit HighCheck soonFuel System45–120 minutes for initial diagnosisP0193 means Fuel Rail Pressure Sensor A Circuit High. Learn the likely symptoms, common causes, and a safe diagnostic order before replacing parts.P0194Fuel Rail Pressure Sensor A Circuit IntermittentCheck soonFuel System45–120 minutes for initial diagnosisP0194 means Fuel Rail Pressure Sensor A Circuit Intermittent. Learn the likely symptoms, common causes, and a safe diagnostic order before replacing parts.P0202Injector Circuit/Open Cylinder 2Check soonFuel System45–120 minutes for initial diagnosisP0202 means Injector Circuit/Open Cylinder 2. Learn the likely symptoms, common causes, and a safe diagnostic order before replacing parts.P0203Injector Circuit/Open Cylinder 3Check soonFuel System45–120 minutes for initial diagnosisP0203 means Injector Circuit/Open Cylinder 3. Learn the likely symptoms, common causes, and a safe diagnostic order before replacing parts.P0204Injector Circuit/Open Cylinder 4Check soonFuel System45–120 minutes for initial diagnosisP0204 means Injector Circuit/Open Cylinder 4. Learn the likely symptoms, common causes, and a safe diagnostic order before replacing parts.P0205Injector Circuit/Open Cylinder 5Check soonFuel System45–120 minutes for initial diagnosisP0205 means Injector Circuit/Open Cylinder 5. Learn the likely symptoms, common causes, and a safe diagnostic order before replacing parts.P0206Injector Circuit/Open Cylinder 6Check soonFuel System45–120 minutes for initial diagnosisP0206 means Injector Circuit/Open Cylinder 6. Learn the likely symptoms, common causes, and a safe diagnostic order before replacing parts.P0208Injector Circuit/Open Cylinder 8Check soonFuel System45–120 minutes for initial diagnosisP0208 means Injector Circuit/Open Cylinder 8. Learn the likely symptoms, causes, safety implications, and a practical diagnostic order.