OBD2 trouble code reference
15 codes across 4 prefix groups on this page.
B0xxx
C0xxx
P0xxx
- P0128 Coolant Thermostat (Coolant Temp Below Regulating Temp) cooling
- P0171 System Too Lean (Bank 1) fuel air
- P0172 System Too Rich (Bank 1) fuel air
- P0174 System Too Lean (Bank 2) fuel air
- P0300 Random/Multiple Cylinder Misfire Detected ignition
- P0301 Cylinder 1 Misfire Detected ignition
- P0401 Exhaust Gas Recirculation Flow Insufficient Detected emissions
- P0420 Catalyst System Efficiency Below Threshold (Bank 1) emissions
- P0430 Catalyst System Efficiency Below Threshold (Bank 2) emissions
- P0442 Evaporative Emission Control System Leak Detected (Small Leak) emissions
- P0455 Evaporative Emission Control System Leak Detected (Large Leak / No Flow) emissions
- P0700 Transmission Control System Malfunction transmission