2001 Gmc Sierra Service Engine Light Came On Scanner Lean Banks 1 2 Mechanic

2001 GMC SIERRA
170,021 MILES
Avatar
ANONYMOUS
  • MEMBER
  • 1 POST
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
Nov 12, 2012 at 1:57 PM
Advertisement
Avatar
HMAC300
  • ✓ASE Certified Mechanic
  • 48,601 POSTS
  • ASE Certified Mechanic
check fuel presure, low pressure will cause this as well as a vacuum leak.
Nov 12, 2012 at 3:58 PM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.