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P0121 Diagnostic Trouble Code Discussion for March 2015

Throttle Position Sensor Does Not Agree With MAP


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Trouble Ticket Help Requests for DTC P0121
Help Request Posted
2004 Hyundai Santa Fe 2.4L MIL Lamp on VIN: KM8SB12B64
P0121: Throttle Position Sensor/Switch 'A' Circuit Range/Performance. ... local roads with no problem. We know this can happen for at least 2 months of driving. Customer goes on a trip, and uses cruise control. After at least 50 miles of steady cruise, at 82 to 83 MPH (we know this by looking at freeze frame data ), CEL comes on...
March 04, 2015
2003 Cadillac CTS 3.2L Surge, MIL Lamp on, Extremely High Idle VIN: 1G6DM57N13
P0121: TP Sensor 1-2 Correlation Error. Vehicle was brought in with an extremely high idle that was surging at times (2000-3000 RPM) when in park. Cleared the codes from both the engine and trans modules. After about ten maybe 15 minutes the idle settled down to a normal level and was no longer surg...
March 19, 2015