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P0122 code

Tiny
SHANERBJ
  • MEMBER
  • 2000 PONTIAC GRAND PRIX
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 102,395 MILES
I have a 2000 Pontiac Grand Prix and am getting a P0122 code. The scan tool indicates 0% for the TPS for all throttle positions (engine off and on). Voltmeter checks at the TPS indicated normal operation of the sensor. Where do I go from here with troubleshooting? Also, the transmission shift points have increased significantly. Shift point for 1-2 is 35 mph. Could these problems be related?
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Sunday, November 14th, 2010 AT 12:16 AM

2 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,363 POSTS
Hello,

This sounds like there is a connection problem between the TPS and the PCM please use this guide and there engine wiring diagrams to troubleshoot the problem and get back to me.

https://www.2carpros.com/articles/how-to-check-wiring

Here are the engine wiring diagrams(below)

Check out the diagrams (Below)

Please let us know what you find. We are interested to see what it is.

Cheers, Ken
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Sunday, November 14th, 2010 AT 12:27 AM
Tiny
SHANERBJ
  • MEMBER
  • 2 POSTS
Great guide! I found one of the terminals had pulled out of the connector for the TPS all fixed thanks !
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Monday, November 15th, 2010 AT 12:10 AM

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