Check engine light on?
Type in the code from your scanner. You will get the meaning in plain English, the usual causes, how serious it is, and whether you can keep driving.
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Try P0301 · P0420 · U0100 · or rough idle
2Common codes
- P0301Cylinder 1 Misfire Detected45 brands
- P0300Random/Multiple Cylinder Misfire Detected44 brands
- P0420Catalyst System Efficiency Below Threshold (Bank 1)42 brands
- P0171System Too Lean (Bank 1)43 brands
- P0174System Too Lean (Bank 2)40 brands
- P0455Evaporative Emission Control System Leak Detected (Large Le...41 brands
- P0442Evaporative Emission Control System Leak Detected (Small Le...43 brands
- P0128Coolant Thermostat (Coolant Temperature Below Thermostat Re...42 brands
- P0113Intake Air Temperature Circuit High Input43 brands
- P0101Mass or Volume Air Flow Circuit Range/Performance42 brands
- P0401Exhaust Gas Recirculation Flow Insufficient Detected41 brands
- P0505Idle Air Control System39 brands
- P0700Transmission Control System (MIL Request)40 brands
- P0302Cylinder 2 Misfire Detected45 brands
- P0303Cylinder 3 Misfire Detected45 brands
- P0304Cylinder 4 Misfire Detected45 brands
- P0305Cylinder 5 Misfire Detected44 brands
- P0306Cylinder 6 Misfire Detected43 brands
- P0102Mass or Volume Air Flow Circuit Low Input43 brands
- P0135O2 Sensor Heater Circuit (Bank 1 Sensor 1)42 brands
- P0141O2 Sensor Heater Circuit (Bank 1 Sensor 2)43 brands
- U0100Lost Communication With ECM/PCM A43 brands
- B0001Driver Frontal Stage 1 Deployment Control34 brands
- C0035Left Front Wheel Speed Sensor Circuit25 brands
66,311 codes · 48 brands with dedicated data, plus 61 shared-name brands (ABARTH, ACURA, ALFAROMEO, AUDI, ...) that share a related brand's data · vehicle data for 48 of 48.