You've learned how to reset the light, but that doesn't mean the problem has gone away.

I forgot the exact details, but a fault needs to occur a number of times in a specific period of time for a Check Engine light to illuminate.

A random fault that occurs just once will not set a code.

Give it a couple of weeks and then report back.


Since we have the same car, I have posted numerous times on fault codes and check engine lights, etc.

Do a search on my name.

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Paul S.

2001 E430, Bourdeaux Red, Oyster interior.
79,200 miles.

1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".