2000 GMC Jimmy check Engine Light soon

2000 GMC JIMMY
96,000 MILES • 4 CYL • 4WD • AUTOMATIC
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ESTJAN14
  • MEMBER
  • 3 POSTS
My engine light comes on and then goes of with in hours or maybe the next day. I ran a dignostic test and it came back with the codes of p0101 p0174 p0171. What does that mean and I just had the fuel pump replaced last week. I have put so much money into this SUV than any other car I have owned. Its Killing me.
Oct 2, 2008 at 4:30 PM
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SWILLIAMS
  • ✓Experienced Mechanic
  • 597 POSTS
P0101 - Mass air flow sensor circuit range problem.
P0171 - System too lean Bank 1
P0174 - System too lean Bank 2

Check the Mass Air flow sensor connection and test the sensor as well. You can look at the data live if your scan tool allows it.
A bad MAF can cause all three codes.
Oct 13, 2008 at 1:29 PM
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