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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?

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