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Re: detroit desiel heavy duty series/ semi truck
Posted to HD/Fleet Forum on 8/22/2017 2 Replies

Joshua, You may be getting the systems mixed up.

Regen is ONLY for soot. (DPF)

DEF is ONLY for Nox reduction. (SCR) You may have an over-reporting downstream Nox sensor. Does it use a lot of DEF? Login to read more.

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