Quote:
Originally Posted by X5chemist
Map cooling? Must be a DME map cooling scenario. Either the lower radiator or head coolant sensor is a culprit. I would guess the head sensor. The lower one is used for aux fan activation.
Have timing guides been replaced?
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Thank you X5chemist. I replaced the water temperature sensor (head sensor) as you suggested, and that took care of the MAP Cooling code.
I did a little more digging on the other two codes:
22 Function, inlet Camshaft Control Bank 2
71 Signal Camshaft Position Sensor Bank 1
I found a video that makes good sense to me. Since I replaced the timing guides and chain not that long ago, I thought there must be something else going on. The following video on replacing the timing chain tensioner makes sense. I waited on replacing the camshaft position sensors. Instead I ordered a new timing chain tensioner. I think that these codes represent the early waring of a timing chain tensioner that is getting weak and allowing the poor timing. The following video explains this quite well:
https://www.youtube.com/watch?v=ktEctXhtufs&t=497s
I will let you know how this turns out. Thanks again to X5chemist.