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OBD-II Trouble Shooting Got a code reader? Find out what your GM car's Check Engine light is trying to tell you (and then turn Check Engine light off).

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Old 09-24-2009, 03:50 PM   #1
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Default P0123

P0123 Code


Throttle Position (TP) sensor measures amount of throttle
opening. PCM uses TP sensor information for fuel delivery
calculations. TP sensor readings during acceleration are much higher
than those during deceleration or idle.

  • Rough idle
  • High idle
  • Surging
  • Stumbling
  • TPS not mounted tightly
  • TPS plug or wire damaged and shorting
  • Defective TPS
  • Damaged computer (PCM)

If there are no symptoms, the simplest thing to do is to reset the code and see if it comes back.
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Code P0123 TP sensor Circuit High?!?!?! Nytro67 1992-1999 7 06-01-2003 06:16 PM

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