1997 GMC Safari code P0121 service engine soon light

Tiny
ROCKET2220
  • 1997 GMC SAFARI
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 189,000 MILES

Po121 code for 1997 gmc safari what do I need to fix for this code to disappear?

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Sunday, February 27th, 2011 AT 2:39 PM

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Tiny
WRENCHTECH
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  • 20,678 POSTS

That's indicating a problem in the TPS circuit somewhere. It could be the sensor itself, the throttle body, the PCM or any related wiring. It would have to be troubleshooted.

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Sunday, February 27th, 2011 AT 3:29 PM
Tiny
JMCGLONE
  • MEMBER

What is a TPS circuit

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Friday, March 4th, 2011 AT 9:19 PM
Tiny
WRENCHTECH
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  • 20,678 POSTS

It's everything in the system that has anything to do with the TPS.

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Friday, March 4th, 2011 AT 9:21 PM

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