Hey ZoomZoom, reviving this thread because I’m having issues with HPT connecting to my PCM. Was this the error you were getting on the old PCM?
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I had everything connected, key in the run position (turn anymore and the starter tries to go) and was still getting this error. Battery had just came off the charger over night and showed a full charge so trying to figure out what the issue is. My data wires should be good since I’m getting all the lights on the dash, fuel pump primes, and I can blip the starter (don’t have the clutch connected yet).