2021 HR Extended AWD Transit T-250
The image below shows temperatures I recorded while troubleshooting. Specifically, note the ambient temperature. The readings were taken just prior to the 129 fault code. What is missing from when I originally did this image is the reading where the output port meets the pump body, when it reached 80°F the 129 fault would occur, even when it is really cold out. Note that the perspective of the photo is confusing and the exhaust pipe was nowhere near as close to the pump as it looks but was still part of my problem. Both are in different locations now.RidingRoads, I wish it was as simple as the pump getting too warm, but at 21degrees that is definitely not an issue.