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P2121 Post TPS Replacement

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Old 01-28-2018, 07:55 PM
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CFD
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S55 AMG, C5 Z06, 928S (x2), Suburban, MKII Golf, MKIII Jetta (rally),
P2121 Post TPS Replacement

Hey everyone. I was getting a P2121 code that made the car go into limp mode. I replaced the TPS (accelerator pedal) and all was well for about a week. However tonight on the way to dinner it popped the same code and put the car into limp mode. I can clear the code but it is also a pending (current) code so it just comes right back. Are there any other TPS sensors on our cars aside from just voltage regulation in the TB?
Old 03-05-2018, 01:51 PM
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CFD
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S55 AMG, C5 Z06, 928S (x2), Suburban, MKII Golf, MKIII Jetta (rally),
For anyone who may have this problem in the future, I attribute this problem to two things: wheel hop and bad motor mounts. I think the combination of those two things shakes the tb enough to throw a code and put the car in limp mode. I ended up doing a tb adaption as well as replacing the engine and transmission mounts and it fixed everything.

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