2002 BMW 325 Service engine light goes on

Tiny
RGOLFER
  • MEMBER
  • 2002 BMW 325
  • 6 CYL
  • 2WD
  • MANUAL
  • 93,000 MILES
Hi there, kind of a strange question and I probably should hook teh car up to get a reading of any codes to help get an answer here but I was getting a service engine light go on. Because of the codes at that time it signified a vacuem leak which I found two and replaced the boot that goes from the air filter to teh manifold. There was also a hose that needed replacing. Changed the air filter and gas filter and gas cap. This seemed to work for a while but not the light comes on again BUT here is the kicker. I fill the gas tank up. The light stays off until about 3/4 of a tank is left. The service light goes on. At about 1/4 of a tank the light goes off and stays off until I fill up the tank and we go through the whole process again. Any ideas?
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Friday, March 26th, 2010 AT 9:27 AM

4 Replies

Tiny
DR. HAGERTY
  • MEMBER
Strange indeed, there are very few occasions where the strategy employed by Siemens and BMW allows that. Let me know what the scan data reveals.
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Saturday, March 27th, 2010 AT 9:16 AM
Tiny
RGOLFER
  • MEMBER
Errro code is P0128. Hope that helps. Thanks for the help by the way.
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Saturday, March 27th, 2010 AT 7:48 PM
Tiny
DR. HAGERTY
  • MEMBER
Replace the thermostat.
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Saturday, March 27th, 2010 AT 8:39 PM
Tiny
RGOLFER
  • MEMBER
Thanks, I was just loggin back in to ask if that could be the problem. Don't you just love the web! I will let you know how it turns out. Thanks again, have a great weekend.
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Saturday, March 27th, 2010 AT 9:30 PM

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