There are a wide variety of reasons that the check engine light might come on in any vehicle, and this holds true for the 2017 Ford Fiesta. The first diagnostic step You should take when You see the dreaded light is connecting an OBD-2 scan tool to read fault codes; if You don't own one, You can take it to a reputable automotive parts store and they'll often scan for free. The most common cause for the check engine light is a fault with the EVAP emissions system, which can be anything from a loose gas cap to a failed EVAP canister. Also of note, bad spark plugs or a faulty thermostat will illuminate the light, but in order to give You more details, You'll need to find out which codes You're working with.
Richard R
July 16, 2020
Check engine light illuminated in your 2017 ford fiesta vehicle? Check for a loose gas cap first then move on to more complex issues like failed o2 sensors, evaporative emission leaks and serious engine troubles like blown head gaskets or misfiring spark plugs.
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