• If you currently own, previously owned or want to own an Avalanche, we welcome you to become a member today. Membership is FREE, register now!

throttle position sensor

  1. M

    P2135 / reduced engine power

    I have a 2003 avalanche z71 5.3L. The previous owner replaced the throttle position sensor and rewired the connector. I am getting an intermittent error p2135 and the dreaded "reduced engine power" warning leaving the vehicle un-driveable. Also my dash guages sometimes don't work even though the...