Trouble Ticket Help Requests for DTC P0121
|2003 Cadillac Escalade 6.0L Reduced engine power VIN: 1GYEK63N03
P0121: . OK so I have this escalade here. We have replaced the Tb Connector, TB,Tac Module, Pcm, App sensor, Tp sensor 1 wire from tb to tac module. The vehicle randomly goes into limp/reduced engine power mode followed by a one of the codes from above which usually al...
|May 15, 2014|