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1999 Safari 4.3L P0121 tps performance HELP!
Posted to Technical Discussion Forum on 10/23/2002 6 Replies

Subject: 1999 GMC Safari Van 4.3L “W” CSFI

Code: P0121 TP sensor performance

No other codes stored

Before I go into my diagnostics and findings I have to say that when the smoked finally cleared “not the ECM” I was left with an Indy feeling of what was I... Login to read more.

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