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Re: SPN3360 FMI9 CAT TANK CONTROLLER
Posted to HD/Fleet Forum on 5/8/2020

Were all DEF line heaters checked for resistance or opens? Roughly 12-19 Ohms is what I see in most.

Have you broken the code definition down yet? The FM19 portion of the code is screaming "look here".

Study the Description of operations and the code chart... Login to read more.