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Check engine light on

Tiny
BDOML
  • MEMBER
  • 2003 CHEVROLET TAHOE
  • 5.3L
  • V8
  • 2WD
  • AUTOMATIC
  • 250,000 MILES
The truck is running smoothly cold and hot. Code P01071 turned on light. Codes P0174 and P10102 were also present but had not triggered light yet.
Thursday, January 4th, 2018 AT 11:14 AM

4 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,363 POSTS
Hello,

We do not know what the P01071 is it needs to be five digit but the lean mixture code P0174 is usually caused by a cylinder misfire or the MAF sensor needs to be replaced. I would use all AC Delco parts to do the tune up with wires as well. I would also get the MAF for ACDELCO as well.

Here are guides that will help us get started:

https://www.2carpros.com/articles/how-to-replace-a-mass-air-flow-sensor-maf

and

https://www.2carpros.com/articles/how-to-tune-up-a-car-engine

Please let us know what happens.

Cheers, Ken
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Friday, January 5th, 2018 AT 2:40 PM
Tiny
BDOML
  • MEMBER
  • 4 POSTS
It was P0171 lean on the other bank. I now suspect a larking intake manifold gasket.
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Friday, January 5th, 2018 AT 3:56 PM
Tiny
BDOML
  • MEMBER
  • 4 POSTS
The light went out the day after I cleaned the MAF.
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Friday, January 5th, 2018 AT 3:58 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,363 POSTS
Nice work, Cleaning does not always help that why I suggested replacing it. We are here to help, please use 2CarPros anytime.

Cheers, Ken
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Saturday, January 6th, 2018 AT 11:36 AM

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