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International Automotive Technicians Network
Re: P0121 and P2135
Posted to Technical Discussion Forum on 1/12/2011 2 Replies

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TP. I say that because a P0121 is a Throttle Position (TP) Sensor Performance code. The description in Alldata says:

"The engine control module (ECM) compares actual throttle position (TP) to an ex... Login to read more.

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