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.

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 abs / dashboard lights - most serious first:

P0705Transmission Range Sensor A Circuit (PRNDL Input)U0100Lost Communication With ECM/PCM A U0101Lost Communication With TCM U0121Lost Communication With Anti-Lock Brake System (ABS) Control Module A U0140Lost Communication With Body Control Module C0035Right Front Wheel Speed Sensor Supply P0500Vehicle Speed Sensor A Circuit P0720Output Shaft Speed Sensor Circuit