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Daniel Wilson
Daniel Wilson,
Category: Medium and Heavy Trucks
Satisfied Customers: 4373
Experience:  Owner at DJ Wilson
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Have a 2009 maxforce prostar international that is in shut

Customer Question

have a 2009 maxforce prostar international that is in shut down mode because of dpf filter need serviced so cleaned filter but still is in shut down derate mode
Submitted: 9 months ago.
Category: Medium and Heavy Trucks
Expert:  Daniel Wilson replied 9 months ago.

Hi Mark, My name is***** will be glad to help. what fault codes do you have logged in the ECM? This is what is needed to determine what circuit the fault is in so we can then get into further troubleshooting.

Customer: replied 9 months ago.

have code for dpf service and now have a code dtc 3338 spn7179 fmi 17

Expert:  Daniel Wilson replied 9 months ago.

3338 7129 17

AMS KOER STD - EBP unable to build during test

This means that Exhaust back pressure is unable to build to allow regen. How did you clean your DPF filter? Do you have any exhaust leaks?

Expert:  Daniel Wilson replied 9 months ago.

Shops have very expensive equipment for servicing DPF filters and the process is done by baking them but any solvents and other trial attempts to clean them other ways usually results in the customer buying a new filter.

Customer: replied 9 months ago.

yes had it baked by a hd parts store that has a big machine to clean them and I have no exhaust leaks

Expert:  Daniel Wilson replied 9 months ago.

Check your turbo operation and for loss of boost pressure as a faulty turbo can also throw this code along with a faulty sensor or harness throwing a false code if everything checks ok.

Expert:  Daniel Wilson replied 9 months ago.

Hi, Did you still need help with this or did you get this resolved?