Forddude5891

hello everyone i was driving my 2011 f150 the other day out of no were my gas pedal stopped working but the truck was still idling i pulled over turned it off then on it started to work again but rpms were fluctuating alot and jumping around i scanned it and it threw codes for p2122 and p2127 my friend told me it was sensors in the gas pedal so he ordered me a gas pedal.. i tested the pedal and it was showing 3.5 volts i was told it was supposed to be 5 also the rpms were still fluctuating so i thought maybe now it was the throttle body but my friend is telling me the truck has to br reprogrammed or something can soneone please help im in a loop id appreciate it very much

mgrusz16

Are you using a programmer? This it what is making me hesitant about buying one but I need to fix my speedo.

Boostking

Could also be the TPS sensor. BTW, not being rude but please use just a little bit of punctuation and grammar. You'll get more responses.

Forddude5891

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My apologies, I was in a hurry.

Forddude5891

Yes i am, i have an accel tuner would that cause the problem? I have been using it for a few months.

Boostking

If your tuner gives you the ability to log, you should try logging TPS and Pedal Voltage. You can do this with the engine off and key ON. You should have smooth increase in voltage and the pedal is pushed.

You can also test the TPS by using a volt meter. Rotate the throttle blade and watch the volt meter. The voltage should go up smoothly and not jump around. If it does, then the TPS is bad. Easy fix.

Forddude5891

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I tested pedal voltage with a scanner it went up to 3.5 volts. My friend told me it was supposed to go up to 5, so i ordered a new pedal with sensors and the voltage was still the same and my truck was idling rough and rpms were fluctuating

Boostking

Yeah, I would presume it should go to 5v like most sensors. I'd still check the TPS. There are some videos on youtube of how to do this.