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P0121 Diagnostic Trouble Code Discussion for January 2014

Throttle Position Sensor Does Not Agree With MAP

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Trouble Ticket Help Requests for DTC P0121
Help Request Posted
2008 Chevrolet Tahoe LS 4.8L Poor Idle Quality, MIL Lamp on VIN: 1GNFC13C78
P0121: Tps sensor. I need your help, i have a 2008 chevy tahoe that came in with intermitant check engine light on, found the listed codes po121 tps sensor & po573 brake light switch. I looked at throttle boby it was dirty so i cleaned it, started engine ran fine. Next i rem...
January 10, 2014
2005 Ford E-250 5.4L Hesitation, Cuts out, Stall VIN: 1FTNE24L25
P0121: tp sensor A circuit range/performance. ... or maf problem when you get on it. No vac. leaks found sft and lft ok, did pinpoint tests for maf,tested wiring, clean grounds and voltage drop tests. It was very intermitant before now it does it all the time..when it does it P061b ALWAYS comes back, I ge...
January 14, 2014