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P0121 Diagnostic Trouble Code Discussion for February 2012

Throttle Position Sensor Does Not Agree With MAP

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Trouble Ticket Help Requests for DTC P0121
Help Request Posted
2002 Hyundai Elantra GLS 2.0L Poor Idle Quality, MIL Lamp on VIN: KMHDN45D42
P0121: Throttle Position Sensor Circuit Range/Performance. ... Elantra arrived at our shop with a high and unstable idle (around 2000 RPM). The check engine light was also on with a P0121 TPS fault. I found a massive air leak from the intake manifold gasket. I replaced the gasket and checked the TPS signal with a lab ...
February 07, 2012
1996 Volkswagen Golf GTI VR6 2.8L No Start, Stall VIN: 3VWHD81H5T
P0121: Throttle Position senor circuit A. The Car will die going down the road under any condition and will die just idling at times. It takes a few minutes once it dies to restart. When it will not start it kinda fires for a second then will just crank. The engine sounds good when it is cranking over...
February 23, 2012