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boondocker · 03-09-2021, **(Subject: Pressure protection valve )**

Has anyone had trouble with this in the secondary air tank. It feeds my air purge and I believe my fan hub supply. Below freezing my fan stays engaged and I get code 3490 for the purge air actuator every time the truck does a passive regen. Has anyone tried cleaning this valve out as I believe it may be sludged up. Thanks Steve

Rawze · 03-09-2021, **(Subject: Pressure protection valve )**

what year, make, model truck, engine, etc.. some history would likely help.

boondocker · 03-09-2021, **(Subject: Pressure protection valve )**

(03-09-2021 )Rawze Wrote: what year, make, model truck, engine, etc.. some history would likely help.

Sorry 2015 prostar isx