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P0121 Diagnostic Trouble Code Discussion for November 2012

Throttle Position Sensor Does Not Agree With MAP

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Trouble Ticket Help Requests for DTC P0121
Help Request Posted
2003 Chevrolet Impala 3.4L Poor Idle Quality, Surge VIN: 2G1WF52E33
P0121: TP Sensor Performance. ... some problems. Customer said car would go 50 mph with foot off the gas & would idle high at a stop. Confirmed both problems but it only does it about half the time. Scanned & found codes p0101 maf out of range & p0121 tps or app problem. The ch...
November 16, 2012
2008 Pontiac Vibe 1.8L Hesitation, Cuts out VIN: 5Y2SL65828
P0121: Throttle position sense switch a performance. ... one. The vibe originally came in with an intermittent loss of throttle control and a code p0121 throttle pedal position sense switch a perfomance fault. The trouble tree and testing indicated a faulty throttle body. We r...
November 19, 2012
2007 GMC Yukon Denali 6.2L Poor Idle Quality VIN: 1GKFK63817
P0121: TP Sensor 1 Performance. Cleaned throttle body and idle now sits at 1800-2000 when put in drive settles down. tap gas goes back up. my snap on verdict has an idle learn reset but as commonly seen it's not working. anybody know how to reste idle manually. I heard you have to hold gas p...
November 27, 2012