2004 Toyota Corolla check engine light is on but car is running fine, anyone know why?
Never Ignore it, have it checked for free at your auto store...
This Site Might Help You. RE: Can you ignore "Check Engine" light if the car is running fine? "Check Engine" light suddenly came on last night while on the freeway.
Stopped to tighten the gas cap which solved it 100% in the past. But not this time, it stayed on. Parked it overnight and checked in the morning.
Oil was about 3/4 quarts low so added it. Coolant was low so topped...
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