I am looking into this for my father in law, he has a '04 CTS w/ the 3.6l V6 and it suffers form uncontrolled acceleration under normal operating conditions. The car will rev to redline and stay while he is driving and require him to turn the engine off and pull over. after about 20 min he can restart it and drive off as if nothing happened. He has had the throttle body assembly replaced 3 times, 1 new accelerator pedal, all the wires have been checked for damage and proper connection. Recently after the most recent throttle body and tps sensor replacement the car will not relearn and the issues persist. these are the codes he is getting(from a Snap-On Solis). I am looking for any help because this car is no longer safe to drive and he has spent over 1k in repairs and parts, we want to get this fixed because of his fixed income and lack of a reliable vehicle.
P0507
Idle speed control (ISC) system -rpm higher than expected
Wiring, ISC actuator/IAC valve, throttle motor, throttle valve tight/sticking, ECM
P1012
Exhaust camshaft position (CMP) actuator, bank 1 -incorrect park position
Engine oil level/pressure, mechanical fault
P0121
Throttle position (TP) sensor A/accelerator pedal position (APP) sensor A -range/performance problem
Accelerator cable adjustment, TP/APP sensor
P0221
Throttle position (TP) sensor B/accelerator pedal position (APP) sensor B -range/performance problem
Accelerator cable adjustment, TP/APP sensor
P2176
Throttle actuator control (TAG) system - idle position not learned
Basic setting not carried out
P3018
Rough road sensor circut

C0045
Brake Pressure Sensor "B" (Subfault) ABS
Poss from bad LR hub