I am working on a truck A6 which has the 24239353 file from the factory. It is going into an LSX conversion so has not been run in a vehicle yet.

The T43 seems to operate fine, read and writes ok, but keeps raising P0602 every time the ignition is cycled.

Reason for DTC...."The PCM does not contain the correct program required in order to operate the vehicle."

Has anyone had experience with this code on this or other controllers and knows whether it is harmless or the T43 is really got some brain damage?

I know what the GM flow chart says...which is that it has not been programmed, but it does have a valid OS and full set of calibrations so there is something in there.....

Thankyou.