recurring code P0121

By silverSC
November 23, 2015 in 1999-2013 Silverado 1500 & Sierra 1500

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silverSC

Posted November 23, 2015

Recently afflicted with code P0121 throttle position sensor error. Bought new accelerator pedal (bottom of drive by wire) on GM parts guy advice, but not fixed. Will go off by itself from time to time, and can be erased as well, with no apparent drivability issues. Any thoughts???

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