P0122 code

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?

Sunday, November 14th, 2010 AT 12:16 AM

2 Replies

KEN L

MASTER CERTIFIED MECHANIC
51,710 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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