Hello
Im hoping someone might be able to help me, or direct me to someone that can...
We recently installed a 2005 WRX engine, pcm, and wiring harness into a customers 2000 Imprezza RS. The engine runs great, and only has 1 fault code left. The code is a hard fault that comes back no matter what we do. The code that we get is P0031, this comes back as bank 1 sensor 1 heater circuit low input. We have verified all of the wires, purchased a new sensor, checked all of the connectors, and can not get the code to go away. From our testing, the pcm does not appear to be grounding the heater circuit like it should to turn it on. I visually inspected the pcm circuit board, and didnt see anything burnt or broken. Does anyone have any ideas besides buying a new pcm from Subaru? I have contacted pcm rebuild guys and they say it is too new... Any ideas???
THANKS
Karl