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2013 Chevrolet Suburban
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P1514 reduced engine power - Suggestions & advice?

Old Mar 20, 2026 | 12:35 PM
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Default P1514 reduced engine power - Suggestions & advice?


2003 Tahoe LS, 196,000 miles, 4.8L V8 Vortec.
My Tahoe went into reduced engine power mode more than 10 times in a row as I was driving on a two-lane highway, traveling around 50-55 mph. I kept clearing the code and it kept coding. Throttle body/throttle position sensor was replaced at 193,000 miles. TAC module was replaced at 174,000 miles. Grounds have been checked. Any suggestions or advice?
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