2007 Chevy Tahoe LTZ Engine Light

[hunterjim00]

Need a little help.. New To the Forum. I have a 2007 Chevy Tahoe LTZ. The Service Engine Light keeps coming on. It turns off occasionally but always comes back on. The code reads ( P0121 ) " Throttle Position Sensor 1 Performance ". I have replaced the TPS Sensor twice. I just don't know where else to start. Any help would be appreciated.

 

[Craigusaf]

Did you disconnect the battery? If not do so for about 1 hour. This hopefully will let the engine ecu erase previous P0121's . Then do a throttle relearn, let idle 3 min, off 60 sec, repeat twice. Also, driving will help relearn throttle position.