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P0121 Diagnostic Trouble Code Discussion for March 2013

Throttle Position Sensor Does Not Agree With MAP


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Trouble Ticket Help Requests for DTC P0121
Help Request Posted
2007 Chevrolet Suburban 1500 LTZ 5.3L Poor Idle Quality, High Idle VIN: 1GNFK16397
P0121: TP Sensor 1 Performance. I'm stuck on this one. I replaced the Brake switch due to it showing Applied all the time. I also cleaned the Throttle body. After 2 or 3 starts I got a high Idle.2800rpm I tried to relearn the Idle with Snap-on Modis. It would be ok for 2 or 3 key cycles. I...
March 08, 2013
2009 Chevrolet Equinox LS 3.4L MIL Lamp on VIN: 2CNDL13F49
car has all the codes mentioned. plugs wires were changed. customer says then check engine light comes on, the traction control light also comes on and looses power. i am thinking bad throttle body. did the testing as per all data. just wanted to see what othe...
March 08, 2013
2009 Chevrolet Equinox LS 3.4L MIL Lamp on VIN: 2CNDL13F49
car has all the codes mentioned. plugs wires were changed. customer says then check engine light comes on, the traction control light also comes on and looses power. i am thinking bad throttle body. did the testing as per all data. just wanted to see what othe...
March 09, 2013
2006 Ford F-250 Super Duty XL 5.4L No Start VIN: 1FDNF20566
Also has codes= P0198, P0201, P0203, P0205, P0207, P0223. All kodes are KOEO hard fault codes. To extract plugs I disconnected PCM, vapor management valve all ignition coils and some injectors. Everything is hooked back up as it should and it looks like you ca...
March 19, 2013