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"check engine" is a light mostly for emissions. sure, you can get other error codes off of the ECU but in US cars, the concept of check-engine has always been to scare customers into running back to the dealership thinking their car needs serious work, when its really just EGR or something silly.
Check engine = crap. Pop your hood, check to see your motor is still ther = done. Congratulations, you checked your motor.
- Mike
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