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1991 BMW 525 check engine light

Tiny
CJONES217
  • MEMBER
  • 1991 BMW 525
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 178,000 MILES
Check engine light goes off and on, idles up and down
Friday, April 18th, 2008 AT 9:33 AM

2 Replies

Tiny
CJONES217
  • MEMBER
  • 2 POSTS
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Friday, April 18th, 2008 AT 9:35 AM
Tiny
DOCHAGERTY
  • MECHANIC
  • 9,601 POSTS
Have you scanned the car for faults? This could be an oxygen sensor failing or failed or the idle air control valve might be dirty. Its all guesswork and since the check engine light is on there are stored faults, knowing what these faults are will help me to help you.
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Friday, April 18th, 2008 AT 11:30 AM

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