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
P0122 Throttle/Pedal Position Sensor/Switch A Circuit Low Engine & drivability Generic Not manufacturer-specific Not classified
P0123 Throttle/Pedal Position Sensor/Switch A Circuit High Engine & drivability Generic Not manufacturer-specific Not classified
P0125 Insufficient Coolant Temperature for Closed Loop Fuel Control Cooling Generic Not manufacturer-specific Not classified
P0130 O2 Sensor Circuit Bank 1 Sensor 1 Engine & drivability Generic Not manufacturer-specific Not classified
P0132 O2 Sensor Circuit High Voltage Bank 1 Sensor 1 Engine & drivability Generic Not manufacturer-specific Not classified
P0134 O2 Sensor Circuit No Activity Detected Bank 1 Sensor 1 Engine & drivability Generic Not manufacturer-specific Not classified
P0136 O2 Sensor Circuit Bank 1 Sensor 2 Engine & drivability Generic Not manufacturer-specific Not classified
P0137 O2 Sensor Circuit Low Voltage Bank 1 Sensor 2 Engine & drivability Generic Not manufacturer-specific Not classified
P0138 O2 Sensor Circuit High Voltage Bank 1 Sensor 2 Engine & drivability Generic Not manufacturer-specific Not classified
P0139 O2 Sensor Circuit Slow Response Bank 1 Sensor 2 Engine & drivability Generic Not manufacturer-specific Not classified
P0140 O2 Sensor Circuit No Activity Detected Bank 1 Sensor 2 Engine & drivability Generic Not manufacturer-specific Not classified
P0150 O2 Sensor Circuit Bank 2 Sensor 1 Engine & drivability Generic Not manufacturer-specific Not classified
P0151 O2 Sensor Circuit Low Voltage Bank 2 Sensor 1 Engine & drivability Generic Not manufacturer-specific Not classified
P0152 O2 Sensor Circuit High Voltage Bank 2 Sensor 1 Engine & drivability Generic Not manufacturer-specific Not classified
P0153 O2 Sensor Circuit Slow Response Bank 2 Sensor 1 Engine & drivability Generic Not manufacturer-specific Not classified
P0154 O2 Sensor Circuit No Activity Detected Bank 2 Sensor 1 Engine & drivability Generic Not manufacturer-specific Not classified
P0156 O2 Sensor Circuit Bank 2 Sensor 2 Engine & drivability Generic Not manufacturer-specific Not classified
P0157 O2 Sensor Circuit Low Voltage Bank 2 Sensor 2 Engine & drivability Generic Not manufacturer-specific Not classified
P0158 O2 Sensor Circuit High Voltage Bank 2 Sensor 2 Engine & drivability Generic Not manufacturer-specific Not classified
P0160 O2 Sensor Circuit No Activity Detected Bank 2 Sensor 2 Engine & drivability Generic Not manufacturer-specific Not classified
P0161 O2 Sensor Heater Circuit Bank 2 Sensor 2 Engine & drivability Generic Not manufacturer-specific Not classified
P0172 System Too Rich Bank 1 Engine & drivability Generic Not manufacturer-specific Not classified
P0175 System Too Rich Bank 2 Engine & drivability Generic Not manufacturer-specific Not classified
P0180 Fuel Temperature Sensor A Circuit Engine & drivability Generic Not manufacturer-specific Not classified
P0181 Fuel Temperature Sensor A Circuit Range/Performance Engine & drivability Generic Not manufacturer-specific Not classified
P0190 Fuel Rail Pressure Sensor Circuit Bank 1 Engine & drivability Generic Not manufacturer-specific Not classified
P0191 Fuel Rail Pressure Sensor Circuit Range/Performance Bank 1 Engine & drivability Generic Not manufacturer-specific Not classified
P0192 Fuel Rail Pressure Sensor Circuit Low Bank 1 Engine & drivability Generic Not manufacturer-specific Not classified
P0193 Fuel Rail Pressure Sensor Circuit High Bank 1 Engine & drivability Generic Not manufacturer-specific Not classified
P0200 Injector Circuit/Open Engine & drivability Generic Not manufacturer-specific Not classified
P0201 Cylinder 1 Injector A Circuit Engine & drivability Generic Not manufacturer-specific Not classified
P0202 Cylinder 2 Injector A Circuit Engine & drivability Generic Not manufacturer-specific Not classified
P0203 Cylinder 3 Injector A Circuit Engine & drivability Generic Not manufacturer-specific Not classified
P0204 Cylinder 4 Injector A Circuit Engine & drivability Generic Not manufacturer-specific Not classified
P0205 Cylinder 5 Injector A Circuit Engine & drivability Generic Not manufacturer-specific Not classified
P0206 Cylinder 6 Injector A Circuit Engine & drivability Generic Not manufacturer-specific Not classified
P0207 Cylinder 7 Injector A Circuit Engine & drivability Generic Not manufacturer-specific Not classified
P0208 Cylinder 8 Injector A Circuit Engine & drivability Generic Not manufacturer-specific Not classified
P0209 Cylinder 9 Injector A Circuit Engine & drivability Generic Not manufacturer-specific Not classified
P0210 Cylinder 10 Injector A Circuit Engine & drivability Generic Not manufacturer-specific Not classified
P0211 Cylinder 11 Injector A Circuit Engine & drivability Generic Not manufacturer-specific Not classified
P0212 Cylinder 12 Injector A Circuit Engine & drivability Generic Not manufacturer-specific Not classified
P0217 Engine Coolant Over Temperature Condition Cooling Generic Not manufacturer-specific Not classified
P0219 Engine Overspeed Condition Engine & drivability Generic Not manufacturer-specific Not classified
P0220 Throttle/Pedal Position Sensor/Switch B Circuit Engine & drivability Generic Not manufacturer-specific Not classified
P0221 Throttle/Pedal Position Sensor/Switch B Circuit Range/Performance Engine & drivability Generic Not manufacturer-specific Not classified
P0222 Throttle/Pedal Position Sensor/Switch B Circuit Low Engine & drivability Generic Not manufacturer-specific Not classified
P0223 Throttle/Pedal Position Sensor/Switch B Circuit High Engine & drivability Generic Not manufacturer-specific Not classified
P0230 Fuel Pump Primary Circuit Engine & drivability Generic Not manufacturer-specific Not classified
P0231 Fuel Pump Secondary Circuit Low Engine & drivability Generic Not manufacturer-specific Not classified