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Old 03-07-2013, 05:46 PM   #5
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Join Date: Nov 2009
Location: Fairfax, VA USA
Posts: 16,639
My Ride: 330CiC, M5, X5
Check engine light should come on when key is turned but before engine starts, during bulb check.

You can also run a cluster test as mentioned in the 4th link below in my signature.

Suggest you read this thread, you will see toward the end of the thread what the original poster found wrong with his dash to cause the CEL not to light!
Solve your misfires, lean codes, rough idle -

Fuel pump failures -

Temp Info -

Hidden OBC Menu - Check Voltage, Temp, Fuel Level -

E46/E39 GM5 Door Lock Info -

Lower hose temp switch O-ring - BMW #13621743299
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