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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...
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