Re: 96 740IL check engine light stays on (archive)

I know what's wrong,but am not gona tell.OK ok I will.Here it is.Ready?.One or both of your catalytic convertors are bad.This is a VERY common problem.Talk to your dealer.The should be under the 80k emmision warranty.Let me know.
Shabir.(I had the same problem)

I previously posted this message but didnt get an answer. Has anyone had their check engine light come on after hard acceleration and afterwards had rough performance to include rough idle. The check engine light continues to stay on. Is the computer getting a bad signal from somewhere and what can be done without knowing the fault codes

I had the same problem last year on my 95 740il, and after several trips to the dealer, it was determined that my computer needed to be replaced. It had to come direct from germany, as the computer had to be programmed with all the previous and current fixes. It took about 2 weeks to get it and it would have cost me $1500 if I didnt still have warranty coverage. But thats not all, I was still having the light come on, which ended up being the o2 sensors. But you should have the computer looked at first because if it is faulty, it will send all kinds of false error codes during diagnostics. good luck!!!

I HAD THE SAME PROBLEM WITH MY CAR.THE CHECK ENGINE LIGHT STAYED ON.I TOOK IT TO MY DEALERSHIP AND HAD TO GET A NEW ENGINE IN MY 1996 728I.BMW PAIDED FOR MOST OF IT BUT I STILL HAD TO PAY OUT �2000

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