I had a spare PCM fixed (previously fried) for my car. I can read the PCM (with bench harness) and it has the correct OS, tune and VIN for my car. When I tried to use it yesterday, it would not play nice with the other controllers. I got reduced engine power, service traction control and ABS messages. I could not connect to the PCM wth the Tune Tool with the PCM in the car.
If I enable a VAT relink will that let this PCM talk to the other controllers or is there something else I need to do?
TIA