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2001 Buick Lesabre Service engine soon light

Tiny
ESTIMATORMAN
  • MEMBER
  • 2001 BUICK LESABRE
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 68,000 MILES
I just got gas and a carwash. Now the service engine soon light comes on and stays on, it does not flash. Sometimes, the light just goes out. Sometimes the car stumbles or hesitates. What could be wrong? Other than that, the car runs fine.
Saturday, January 26th, 2008 AT 12:00 PM

3 Replies

Tiny
2CARPRO JACK
  • MECHANIC
  • 11,533 POSTS
Have the PCM scanned for trouble codes, Autozone will do it for free. This will tell us a good place to begin.
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Sunday, January 27th, 2008 AT 9:29 AM
Tiny
ESTIMATORMAN
  • MEMBER
  • 2 POSTS
Okay. Went to Auto Zone. "The PCM has determined that the mass air flow input is lower than expected for the current engine operating conditions".
What is the most probable cause?
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Sunday, January 27th, 2008 AT 3:24 PM
Tiny
2CARPRO JACK
  • MECHANIC
  • 11,533 POSTS
Could be a bad Mass Airflow Meter. You can try cleaning it with the proper cleaner, but I have never had much luck with it working for very long
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Monday, January 28th, 2008 AT 7:29 AM

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