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 stalling - most serious first:

P0320Ignition/Distributor Engine Speed Input Circuit P0335Crankshaft Position Sensor A Circuit P0340Camshaft Position Sensor A Circuit Bank 1 or Single Sensor P0601Internal Control Module Memory Checksum Error P0606Control Module Processor P0607Control Module Performance U0100Lost Communication With ECM/PCM A P0102Mass or Volume Air Flow Sensor A Circuit Low P0107Manifold Absolute Pressure/Barometric Pressure Sensor Circuit Low P0171System Too Lean Bank 1 P0505Idle Control System P0508Idle Air Control System Circuit Low P0740Torque Converter Clutch Circuit/Open P0742Torque Converter Clutch Circuit Stuck On P0506Idle Control System RPM - Lower Than Expected