How to clear engine derate on a Volvo VN / VNL?
Connect a diagnostic scanner capable of communicating with your specific truck Clear all fault codes related to the derate (this will most likely be necessary) Perform a forced regen through the diagnostics scanner, to confirm that the truck does not have any issues with the aftertreatment system
How to drain DEF tank on Volvo truck?
Place a drain pan / container capable of containing around 18 gallons (or if your able, perform this procedure when your DEF tank is about ¼ full, therefore not requiring you to drain so much DEF) underneath the DEF tank Unscrew the drain plug on the bottom of the DEF tank, there is only one bolts in the tank itself and the metal housing has a cut out specifically for the plug Drain the DEF and tighten the plug back up
