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P1220 Diagnostic Trouble Code Discussion for July 2005

TP Sensor 2 Circuit Malfunction

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Trouble Ticket Help Requests for DTC P1220
Help Request Posted
2001 Chevrolet Express 3500 8.1L MIL Lamp on, reduced engine power VIN: 1GCHG39G11
P1220: TP Sensor 2 Circuit Malfunction. reduced engine power happens any time , sometimes once a day , no patern to problem . all chassis grounds have been cleaned and checked . all wiring between tac mod and throttle body have been inspected and tested with a dmm, all ok. 5 volt reference volt to t...
July 28, 2005