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Message: <blockquote data-quote="Pujols5" data-source="post: 27349" data-attributes="member: 6155"><p>Has anyone had any issues with getting a P0121 for the throttle position sensor and immediately following that code a p0299 for turbo underboost condition? I can clear the codes and drive about a mile and the check engine lights comes right back on and the Equinox goes into reduced power mode. The codes seem to come on together but I haven’t read anywhere where they are related.. I’ve throughly checked the intercooler and all hoses and pipes for vacuum leaks and everything looks good.</p></blockquote><p></p>