OBD-II Code Decoder

Search the licensed P, B, C, and U reference library by code, definition, system, or manufacturer. Reference-only results are not a complete diagnosis.

  • 12,128 OBD-II codes
  • 18,805 reference definitions
  • 16,185 publicly searchable across 10,181 codes

Review-withheld definitions are excluded; lookup records are not published diagnostic pages.

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Matching definitions: 14,150 · Unique codes: 8,153.

Code Meaning System Scope Manufacturer Severity
P0016 Crankshaft Position - Camshaft Position Correlation Bank 1 Sensor A Engine & drivability Generic Not manufacturer-specific Not classified
P0017 Crankshaft Position - Camshaft Position Correlation Bank 1 Sensor B Engine & drivability Generic Not manufacturer-specific Not classified
P0018 Crankshaft Position - Camshaft Position Correlation Bank 2 Sensor A Engine & drivability Generic Not manufacturer-specific Not classified
P0020 A Camshaft Position Actuator A Control Circuit/Open Bank 2 Engine & drivability Generic Not manufacturer-specific Not classified
P0021 A Camshaft Position - Timing Over-Advanced or System Performance Bank 2 Engine & drivability Generic Not manufacturer-specific Not classified
P0022 A Camshaft Position - Timing Over-Retarded Bank 2 Engine & drivability Generic Not manufacturer-specific Not classified
P0023 B Camshaft Position Actuator A Control Circuit/Open Bank 2 Engine & drivability Generic Not manufacturer-specific Not classified
P0024 B Camshaft Position - Timing Over-Advanced or System Performance Bank 2 Engine & drivability Generic Not manufacturer-specific Not classified
P0025 B Camshaft Position - Timing Over-Retarded Bank 2 Engine & drivability Generic Not manufacturer-specific Not classified
P0030 HO2S Heater Control Circuit Bank 1 Sensor 1 Engine & drivability Generic Not manufacturer-specific Not classified
P0031 HO2S Heater Control Circuit Low Bank 1 Sensor 1 Engine & drivability Generic Not manufacturer-specific Not classified
P0032 HO2S Heater Control Circuit High Bank 1 Sensor 1 Engine & drivability Generic Not manufacturer-specific Not classified
P0036 HO2S Heater Control Circuit Bank 1 Sensor 2 Engine & drivability Generic Not manufacturer-specific Not classified
P0037 HO2S Heater Control Circuit Low Bank 1 Sensor 2 Engine & drivability Generic Not manufacturer-specific Not classified
P0038 HO2S Heater Control Circuit High Bank 1 Sensor 2 Engine & drivability Generic Not manufacturer-specific Not classified
P0040 O2 Sensor Signals Swapped Bank 1 Sensor 1/Bank 2 Sensor 1 Engine & drivability Generic Not manufacturer-specific Not classified
P0050 HO2S Heater Control Circuit Bank 2 Sensor 1 Engine & drivability Generic Not manufacturer-specific Not classified
P0051 HO2S Heater Control Circuit Low Bank 2 Sensor 1 Engine & drivability Generic Not manufacturer-specific Not classified
P0052 HO2S Heater Control Circuit High Bank 2 Sensor 1 Engine & drivability Generic Not manufacturer-specific Not classified
P0056 HO2S Heater Control Circuit Bank 2 Sensor 2 Engine & drivability Generic Not manufacturer-specific Not classified
P0057 HO2S Heater Control Circuit Low Bank 2 Sensor 2 Engine & drivability Generic Not manufacturer-specific Not classified
P0058 HO2S Heater Control Circuit High Bank 2 Sensor 2 Engine & drivability Generic Not manufacturer-specific Not classified
P0068 MAP/MAF - Throttle Position Correlation Engine & drivability Generic Not manufacturer-specific Not classified
P0070 Ambient Air Temperature Sensor Circuit A Engine & drivability Generic Not manufacturer-specific Not classified
P0071 Ambient Air Temperature Sensor Circuit A Range/Performance Engine & drivability Generic Not manufacturer-specific Not classified
P0072 Ambient Air Temperature Sensor Circuit A Low Engine & drivability Generic Not manufacturer-specific Not classified
P0073 Ambient Air Temperature Sensor Circuit A High Engine & drivability Generic Not manufacturer-specific Not classified
P0087 Fuel Rail/System Pressure - Too Low Bank 1 Engine & drivability Generic Not manufacturer-specific Not classified
P0088 Fuel Rail/System Pressure - Too High Bank 1 Engine & drivability Generic Not manufacturer-specific Not classified
P0089 Fuel Pressure Regulator A Performance Engine & drivability Generic Not manufacturer-specific Not classified
P0090 Fuel Pressure Regulator A Control Circuit/Open Engine & drivability Generic Not manufacturer-specific Not classified
P0091 Fuel Pressure Regulator A Control Circuit Low Engine & drivability Generic Not manufacturer-specific Not classified
P0092 Fuel Pressure Regulator A Control Circuit High Engine & drivability Generic Not manufacturer-specific Not classified
P0093 Fuel System Leak Detected - Large Leak Engine & drivability Generic Not manufacturer-specific Not classified
P0094 Fuel System Leak Detected - Small Leak Engine & drivability Generic Not manufacturer-specific Not classified
P0100 Mass or Volume Air Flow Sensor A Circuit Engine & drivability Generic Not manufacturer-specific Not classified
P0103 Mass or Volume Air Flow Sensor A Circuit High Engine & drivability Generic Not manufacturer-specific Not classified
P0104 Mass or Volume Air Flow Sensor A Circuit Intermittent Engine & drivability Generic Not manufacturer-specific Not classified
P0105 Manifold Absolute Pressure/Barometric Pressure Sensor Circuit Engine & drivability Generic Not manufacturer-specific Not classified
P0106 Manifold Absolute Pressure/Barometric Pressure Sensor Circuit Range/Performance Engine & drivability Generic Not manufacturer-specific Not classified
P0107 Manifold Absolute Pressure/Barometric Pressure Sensor Circuit Low Engine & drivability Generic Not manufacturer-specific Not classified
P0108 Manifold Absolute Pressure/Barometric Pressure Sensor Circuit High Engine & drivability Generic Not manufacturer-specific Not classified
P0110 Intake Air Temperature Sensor 1 Circuit Bank 1 Engine & drivability Generic Not manufacturer-specific Not classified
P0111 Intake Air Temperature Sensor 1 Circuit Range/Performance Bank 1 Engine & drivability Generic Not manufacturer-specific Not classified
P0112 Intake Air Temperature Sensor 1 Circuit Low Bank 1 Engine & drivability Generic Not manufacturer-specific Not classified
P0115 Engine Coolant Temperature Sensor 1 Circuit Cooling Generic Not manufacturer-specific Not classified
P0116 Engine Coolant Temperature Sensor 1 Circuit Range/Performance Cooling Generic Not manufacturer-specific Not classified
P0117 Engine Coolant Temperature Sensor 1 Circuit Low Cooling Generic Not manufacturer-specific Not classified
P0118 Engine Coolant Temperature Sensor 1 Circuit High Cooling Generic Not manufacturer-specific Not classified
P0120 Throttle/Pedal Position Sensor/Switch A Circuit Engine & drivability Generic Not manufacturer-specific Not classified