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If there no codes showing problems but your check engine light is still on what is wrong?
Wiki User
∙ 12y ago
the vehicles ECU (Engine Control Unit) stores information pertaining to these codes that trigger a check engine light. whenever you fix a problem the light will typically extinguish. in some cases the manufacturer will program the ECU to monitor a certain condition for a period of time, miles driven, or engine cycles( car off+ car start+ car drives+ car turns off) to ensure the fixed application continues to funtion properly. in most cases, as long as the problem does not come back, the light will extinguish on its own in a few days to a week of driving as you normally would. also, newer vehicles "learn" your driving habits in relation to fuel mapping for fuel economy and continued power. this would be another reason the check engine light is on with no codes drawn ( usually if a battery is disonnected then reconnected, this would occur).
if none of these apply to your situation, the best thing to do would be to go to the dealership. especially if the car is still under warranty. that is what the warranty is for. USE IT!!
Wiki User
∙ 12y ago
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