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Re: Check engine warning (archive)

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Posted by Gman on April 16, 2002 at 16:57:50:

In Reply to: Check engine warning posted by John Wong on April 16, 2002 at 09:37:12:

I have the same year 750il with about the same mileage, and I have the same lights on.

You should verify this, but I think that the airbag light isn't a big problem if it goes off after 2 min. That means that the sensor for the passenger side is malfunctioning, so it will deploy the passenger airbag even if no one's there.

The "check engine" light is more of a puzzling problem. I've had the dealer (Knauz) tell me that they couldn't read the fault code. I have an OBD II scanner that's telling me it's a fuel trim error (yes, this car has an OBD II port behind a clipped-on panel right next to the front cupholder). One possibility I intend to explore is what appears to be a "secret recall" that's in TSB number 120796, dated Sept. 1996. (Please e-mail me if you want a copy of this TSB that was sent to me by a kind fellow-user of this BB.) My car has been to a few dealers over the years, and I don't think ANY of them performed the procedure outlined in this TSB, even though it says, "PERFORM THE PROCEDURE OUTLINED IN THIS SERVICE INFORMATION ON ALL AFFECTED VEHICLES THE NEXT TIME THEY ARE IN THE SHOP FOR MAINTENANCE OR REPAIRS." (This TSB is for all M73 engines produced up to 3/96.) The TSB is quite involved, and indicates possible replacement of throttle housing assemblies and the PWG wiring harness. As you might have guessed, I'm getting pretty frustrated. I've called BMW NA's customer service line, but they have been no help.
Please let me know what you learn from this BB, or from your mechanic and/or BMW dealer.

light and air bag warning lights came on simultaneously and will not go out on my '95 750il with 88000 miles. Engine is as smooth as usual with plenty of torque and idles normally at about 700 rpm. Jiggled the seat belts, no change.
Any suggestions appreciated before having to take to dealer.

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