Service engine light came on scanner said lean.

Tiny
ANONYMOUS
  • 2001 GMC SIERRA
  • 170,021 MILES

Service engine light came on scanner said lean banks 1 and 2 mechanic replaced intake gasket before I pulled out of there parking lot light came back on scanner said same thing he cleared code light came back same reading lean banks 1 and 2. Any ideas

Monday, November 12th, 2012 AT 1:57 PM

1 Reply

Tiny
HMAC300
  • EXPERT
  • 45,722 POSTS

Check fuel presure, low pressure will cause this as well as a vacuum leak.

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Monday, November 12th, 2012 AT 3:58 PM

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