Quote:
Originally Posted by Gogoarce
2002 M3: Check Engine Light is On, read code "catalyst system efficiency, cyl #4-6". What does that means? It is a "do-it-yourself" fix or do I need to take it to the shop?
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Why don't you try a obdii tool that will tell you exactly what's wrong with your problem. You can find one with less than 60$ and I think is a lot cheaper then going to a mechanic and run a diagnostic on your car.