Truck will not regen. P24F700 - Exhaust aftertreatment fuel air purge valve stuck closed. We had this problem about 2 months ago. We changed the AHI Module and 7th Injector (Purchased from dealer). Truck regened with no problems for about a month after that. Then the same code came up. The air dryer was changed about 3 months ago, so I don't suspect any water/oil plugging anything up. We took off air lines to AHI Module and they were clean. AHI is receiving correct air pressure. AHI is pushing the correct fuel pressure out. 7th injector was taken off and cleaned, no blockages. Could I have gotten a faulty AHI Module?
Quite possibly.