I’m a new P38 owner trying to clear up my last problem in order to pass my emissions test. I have a 2001 Rover with the 4.6 HSE motor. The SES light is on, with only one code present, 1669. I have already removed the ECM fan, verified it is operating with 12 VDC applied, cleaned it and even tried installing a spare fan. The code and light returned. I checked for 12 VDC coming from the ECM and found I am only getting 7.8 VDC. I’ve searched the forums and looked at some wiring diagrams but I’m wondering if anyone knows what supplies the voltage for the ECM fan? Is it a relay? Is it driven by a thermostat somewhere?