Question about 1999 BMW 5 Series

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Warning lights suddenly popped up

My '99 E39 had 3 dash lights go on simultaneously-ASC, ABS & Transmission Fail- Safe Mode. it happened when i stomped the gas. had it checked & there are 3 "Not Defined Error"s. now it crawls in limp mode in 3rd gear. tried clearing it, no go. tried resetting by disconnecting battery for the 30 min, still no go. now i notice speedo, back-up sensor, odo & auto anti-glare mirror also dont work. whats happening to my car??

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  • BMW Master
  • 1,348 Answers

Check all the fuses and relays out first.
the abs and traction control are related because the computer reads the wheel speed from the abs sensors.it uses that output to control braking to slow the wheel down.
did you have any service done or an aftermarket stereo installed?
alot of issues arise from damaged wiring improperly routed or pinched in body panels or trim pieces.
the speedometer is fed data from the output shaft of the transmission.
just hope the main ecu or the powertrain module is not blown,they are very expensive.

Posted on May 28, 2009

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