Posted in the Cummins Forum
#1 Nov 30, 2010
I have a 2002 dodge 2500 with 5.9 Cummins, it keeps giving me a p122 and p121 eng codes. I pull the plug on the TPS sensor and re-install the plug and it has worked fine for a few days, then it does it again. I clear the codes each time I have to pul the plug off. The throttle quits working sometimes, I again will pull the plug and re seat it, and clear the code all things work normal.
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