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28/12/2020 8:43 am
Topic starter
I have a 2007 pontiac g5 with 200,000 miles that is vibrating when coming into a complete stop. Check engine light is on gives out a P0121 Throttle/pedal position sensor/ switch a circuit range/ performance problem. Cleaned out the throttle body still same problem.
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28/12/2020 9:34 am
What the P0121 code means. P0121 is a generic OBD-II code which indicates that the Engine Control Module (ECM) has seen the TPS sensor circuit A learned output voltage go above or below the sensor's expected range when compared to TPS sensor circuit B
Unless you can check the TPS with a DVOM and check its values I would suggest just replacing it and see. Since it is always being used and is physical it is a item which can wear out and cause errors.
