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I have a 2002 tahoe all of a sudden my truck lost almost all power and the check engine light came on also reduced engine power light came on. I pulled over and shut truck off and turned it back on, still lights. I only had a qrt tank had in it. I turned around to the gas station to put more gas in and call a friend. I turned truck off put gas in and when I started truck, lights were off. And truck ran fine. It has done this a couple of times now, all times I only had a qrt tank gas in it. Code read p1221. Can this code make all this happen and I need to narrow it to what's really up. Please help.

Vehicle: 2002 Chevy Tahoe 5.3

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HI there

This code is for the throttle position sensor correlation sensor one and 2. These sensors report the throttle position to the computer. The most common issue is the TPS itself. This is part of the throttle body and the throttle has to be replaced.

P1221 CHEVROLET - Throttle Position Sensor 1- 2 Correlation

Read more: https://www.autocodes.com/p1221_chevrolet.html

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