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Q:

where is the throttle position sensor located ? on 1998 Pontiac Grand Prix GTP

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
is it difficult to replace?
(1) Answer
on the throttle body. i would be aware that code numbers never identify bad parts just failed systems. i would be sure the parts are bad before throwing parts at it that dont fix anything. let a shop verify the failures.

Roy