CODE P0121 SERVICE ENGINE SOON LIGHT

1997 GMC Safari

Tiny

rocket2220

February, 27, 2011 AT 2:39 PM

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

FOUND 16895 RELATED QUESTIONS

3 Answers

Tiny

Wrenchtech

February, 27, 2011 AT 3:29 PM

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.

Tiny

jmcglone

March, 4, 2011 AT 9:19 PM

What is a TPS circuit

Tiny

Wrenchtech

March, 4, 2011 AT 9:21 PM

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

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