p0121 where can i see it in chevy tahoe

Question

chevy tahoe 2008 ltz  with 5.3 liter flex fuel.i had a check engine light i scan it gives me a code of p0121

Answer 1

Hi there,

This code is for the throttle position sensor. This is mounted to the side of the throttle body. Sometimes cleaning the throttle body will resolve this issue, if not, then it's likely going to need a new TPS.