List Of Will I Pass Emissions With A Check Engine Light On References. The check engine light, also known as the malfunction indicator lamp, is a signal from the engine control unit (ecu) which indicates that there is a fault with the engine system. Bring your vehicle to a smog test location that retests for free

The check engine light is almost entirely related to your emissions system. You can also use other techniques to turn off the light, though they may last for a while. The check engine light indicates a problem with your car’s emissions system and must be fixed before it can pass.





