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Thanks bandit, I'll be checking on that valve. I wonder if there is a rebuild kit out there?

Same here with mine. My truck was a brand new never issued M932A2 with 9 hours on the meter and 90 miles on the odometer. CTIS worked great for a number of months until the cold snap here in Calif. The hiway light activates when the truck is fired up. Truck makes air pressure to normal range...

Sounds exactly like the issue with my M932A2 that has frustrated any efforts of diagnosis . What and where is the air valve you are describing? Any chance of a couple of pics?

Check out the diagram/pic on page #60 of the Dana trouble shooting guide for location and installation of the wheel valve filters...

Welcome to the 5 flashing CTIS light syndrome brother...symptoms to my truck are exactly like yours. The truck CTIS worked perfectly for 4 months following purchase until the cold weather hit us, 11F central coast Pozo area. I've found a few minor leaks, replaced all the air tank drain valves...

Thanks Suprman, it sure seemed to coincide with the cold snap. I'll be getting back out to again this weekend running these issues down.

Thanks brothers! I didn't have any issues until we had this cold snap in Cali, its been down to 11 degrees in the morning at the ranch. After my front tires completely deflated, I manually aired them up. They havn't gone flat again but the system does not air up to hiway pressures. I've got the...

How did you bypass the pressure switch? My truck is a NOS M932A2 complete 2011 rebuild with 6 hours and 13 miles on it. Everything on the truck is new. It worked fine on recovery, pulled a M146 trailer home with it 300 miles. Have used it for several months off roading and hiway use using the...