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P0121 Diagnostic Trouble Code Discussion for December 2014

Throttle Position Sensor Does Not Agree With MAP

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Trouble Ticket Help Requests for DTC P0121
Help Request Posted
1999 Volvo S80 2.9 2.9L rough idle, no accel VIN: YV1TS97D9X
P0121: pedal position sensor or circuit or electronic throttle module fault. Thanks in advance guys! What the car does, is, intermittently goes into limp home type mode. CEL comes on and car will not rev over about 1,700-1,800. Will reset after a few tries of turning off and on. Started doing this about a week ago. I don't think the O2...
December 29, 2014