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P0121 Diagnostic Trouble Code Discussion for October 2009

Throttle Position Sensor Does Not Agree With MAP

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Trouble Ticket Help Requests for DTC P0121
Help Request Posted
1998 GMC Safari SL 4.3L MIL Lamp on VIN: 1GKDM19WXW
P0121: TP Sensor Performance. ... me.I have a p0121 TPS code that occurs repeatedly. I started with a new TPS sensor. because of the mileage, it was factory, cleared code and it came back a week later with code p0121. I followed the flowchart on mitchells and the problem is intermittent, a...
October 31, 2009