P0122 code

2000 PONTIAC GRAND PRIX

102,395 MILES • 6 CYL • FWD • AUTOMATIC

SHANERBJ

MEMBER
2 POSTS

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?

Nov 13, 2010 at 4:16 PM

STRAILER

✓Experienced Mechanic
55,456 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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