Check Engine Light Question

Gogoarce · 03-26-2009, 07:30 AM

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?

CassiesMan · 03-30-2009, 05:52 PM

It means one of your cattalytic converters is out/off/not working properly. Depending on where you live and emmisions laws, it may be kinda cheap, it may be horribly not cheap.

alinpion · 08-19-2011, 02:17 AM

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?

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.

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