P0101 CHECK ENGINE

2004 GMC SIERRA
100,000 MILES • V8 • 4WD • AUTOMATIC
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HENRY_15
  • MEMBER
  • 6 POSTS
The check engine light keep reappearing after I erase it sometimes 6 to 8 months after.it is P0101. it runs well and does 'nt take more gaz than before.Is is a k 2500 hd with a 6 liters engine.What could be the problem???????. thanks
Jun 20, 2012 at 6:06 PM
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ASEMASTER6371
  • ✓Experienced Mechanic
  • 52,796 POSTS
erasing a code never fixes anything.

101 is a mass air flow circuit issue. you need to have someone monitor the mass air flow sensor under different condition to determine if it is wiring or the sensor itself.

Roy
Jun 20, 2012 at 6:10 PM
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