P0171 & P0174 Errors... NEED HELP QUICK!!!

Discussion in 'General Chevy & GM Tech Questions' started by mkruluts, Mar 13, 2010.

  1. mkruluts

    mkruluts New Member

    Year: 2005
    Make: Chevrolet
    Model: Silverado Z71 Extended Cab
    Engine: 5.3L
    Mileage: 50,2XX

    I recently installed an after market K&N intake system, a PowerAid TB Spacer, and Flowmaster exhaust. My check engine light came on that day and had the following codes:
    P0171 - System too lean (Bank 1)
    P0174 - System too lean (Bank 2)

    I read the codes and cleared it not thinking about it, and when I took the truck to get inspected, it failed emissions because of it. I know this is an issue, and the ecu needs to be tuned. Can anyone suggest a hand held tuner that will safely tune my ecu for the new parts and pass me on inspection? Will the Hypertech Power Programmer III do this for me?

Share This Page

Newest Gallery Photos