Fix codes P0120, P0220, P1516 – Chevrolet Tahoe 5.3L
Chevrolet Tahoe vehicles may experience a performance issue where they will not go over 15MPH and show trouble codes P0120, P0220, P1516. The vehicle may appear to be in “limp-in” mode, giving just enough power to get you to a shop.
The codes indicate a problem with the throttle position sensor circuits and throttle actuator performance. Do NOT start replacing parts. Shops report a pattern failure in the electrical harness to these sensors. Chevrolet has issued a revised replacement harness to correct the problem. The original connector was prone to vibration and broken wires that disrupted the signal to the PCM and put the vehicle into reduced power mode.
© 2012 Rick MuscoplatPosted on by Rick Muscoplat