Originally Posted by BillBoost37
Have you looked at the temp according to the scan tool? You have two temp sensors..one for the pcm and one for the gauge on the dash. If your pcm one failed..it might be defaulting the fans on.
Last week when I initially found the problem the scan tool said coolant temp was 195. The gauge on the dash was similar. A few weeks back when I had a misfire I noticed head pressure listed as normal, which I believe is the only other reading under head pressure. I suspect the pcm is going wacky.
I have another pcm that I had taken out 6 months ago as I was having some severe problems and suspected pcm was bad. Swapped with another one and problem didn't go away, so I think the old pcm is ok. I'll swap that out again and see if things change.