Thread: Dtc P0121
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Old 12-04-2004, 11:59 PM   #3
bluehorse1968
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Thumbs up Re: Dtc P0121

I changed the Throttle Position Sensor (TPS) and that appeared to have corrected the problem.

Thanks for the help !!!

Quote:
Originally Posted by gbic1
Do you have access to a DVOM? if so you may check the operation of the tp sensor at the throttle body by back probing the connector. You will be looking for a voltage of less the one volt at idle to about 5 volts at wide open throttle. Please check this with key on engine OFF! good luck. ( or you could just replace the tp sensor as a best guess, not that expensive)
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