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P1221 Diagnostic Trouble Code Discussion for February 2015

TP Sensor 2 Signal Correlation


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Trouble Ticket Help Requests for DTC P1221
Help Request Posted
2001 GMC Yukon XL 1500 Denali 6.0L MIL Lamp on VIN: 1GKFK66U61
P1221: TP Sensor 2 Signal Correlation. most of the time fault sets on cold start up but have gotten it to fail on decel at highway speed inspected wiring from tps to tac module. Issue occured after lower intake gasket repair
February 24, 2015
2001 GMC Yukon XL 1500 Denali 6.0L MIL Lamp on VIN: 1GKFK66U61
P1221: TP Sensor 2 Signal Correlation. most of the time fault sets on cold start up but have gotten it to fail on decel at highway speed inspected wiring from tps to tac module. Issue occured after lower intake gasket repair
February 27, 2015