engine warning light · malfunction indicator lamp · MIL
The engine control unit has detected a fault somewhere in the engine, transmission, or emissions system and stored a trouble code (a "P" code) explaining what went wrong.
Get the code read with an OBD-II scanner (many auto parts stores do this free) or book a diagnostic at a workshop, then look up the exact code in our OBD-II library.
A steady light usually means you can drive carefully and get it checked soon. A flashing light means an active misfire is dumping raw fuel into the catalytic converter - stop driving and get it towed if possible.
Find a trusted auto repair shop near you and book a diagnostic visit online in minutes.
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Descriptions are for guidance only and do not replace a workshop inspection. If you are ever unsure whether it is safe to keep driving, pull over in a safe spot.
Oil Pressure Warning Light
CriticalEngine oil pressure has dropped below a safe level, meaning moving parts inside the engine may not be getting enough lubrication.
Coolant Temperature Warning Light
CriticalThe engine coolant temperature has climbed above the safe operating range - the engine is overheating.
EPC Warning Light (Electronic Power Control)
WarningFound mainly on Volkswagen, Audi, Seat, and Skoda vehicles, this light indicates a fault in the electronic throttle control system, which manages engine power delivery.
Catalytic Converter Warning Light
WarningThis appears as part of the check engine light system when the ECU specifically detects the catalytic converter is not cleaning exhaust gases efficiently.
