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Re: MaxxForce 7 DOC question aka Ford 6.4L
Posted to HD/Fleet Forum on 3/18/2020

These engines are very good for the DPF's clogging up or failing (cracking). Most times the damage to the DPF is visible, in which case it gets a "new" one from dealer or AM. If it's ok, then it gets sent off for a "shake and bake"- the DOC gets the same trea... Login to read more.