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Posted by mentat (93se 5spd) on September 15, 2002 at 15:43:18:
Ok try not to hit me with something for asking this, but if the check engine light is off, will running an ECU diagnostic tell me anything at all? I mean are there some codes that i might get that would not have actually turned on the check engine light? Nothing wrong that I know of or anything, just bored and curious.
m@