P1174 Chevrolet -

Question

I just had the ECM parameters reset for fuel composition when the check engine light came on with DTC P1174 back on 3/05/15. My wife has been on the road for 10 hours today traveling to texas and the light came on again. We have a 2008 chevy Tahoe which uses E-85 or unleaded. Is this a common problem when E-85 and unleaded is mixed? Also is this something that can wait to be fixed until she returns home

Answer 1

Hi there,

This code indicates an issue with the fuel trim on bank 1. Here is some info for you.

P1174 CHEVROLET - Fuel Trim Cylinder Balance Bank 1

Read more: https://www.autocodes.com/p1174_chevrolet.html