OBD-II trouble codes

Ranked by how often the code appears in real NHTSA owner complaints - not alphabetically. P = powertrain, B = body, C = chassis, U = network.

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Browse by symptom

Rough idle / shaking Stalling Hard starting Hesitation / power loss Flashing check engine light Poor fuel economy Shifting problems Temperature / cooling ABS / dashboard lights

Codes whose typical symptoms include temperature / cooling - most serious first:

P0217Engine Coolant Over Temperature Condition P0218Transmission Fluid Temperature Sensor A Over Temperature Condition P0607Control Module Performance P2600Coolant Pump A Control Circuit/Open P0115Engine Coolant Temperature Sensor 1 Circuit P0117Engine Coolant Temperature Sensor 1 Circuit Low P0118Engine Coolant Temperature Sensor 1 Circuit High P0480Fan 1 Control Circuit P0627Fuel Pump A Control Circuit/Open P2681Engine Coolant Bypass Valve A Control Circuit/Open P0125Insufficient Coolant Temperature for Closed Loop Fuel Control P0128Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature)P0532A/C Refrigerant Pressure Sensor A Circuit Low