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Paccar MX13 14 KW T680 passive code has been popping up and…

Paccar MX13 14 KW T680...
Paccar MX13 14 KW T680 passive code has been popping up and clear believe its the OAT sensor. But, this time it came up as Engine SPN 3556, still showing a mil light and issue on nav pro. But dash says no faults or warnings. Should i b concerned?
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Answered in 41 minutes by:
11/15/2017
Daniel Wilson
Category: Medium and Heavy Trucks
Satisfied Customers: 6,890
Experience: Owner at DJ Wilson
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Hi my name is***** will be glad to help. Bare with me while I pull this code up

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3556 18 AmberAftertreatment Doser - Data Valid But Below Normal Operating Range - Moderately Severe Level

Reason

Aftertreatment Doser - Data Valid But Below Normal Operating Range - Moderately Severe Level.

Effect

Possible ineffective regeneration of the aftertreatment diesel particulate filter. Degraded aftertreatment fuel injector.

Component Location

The aftertreatment fuel injector is located on the turbocharger adapter pipe.

Circuit Description

The aftertreatment fuel injector is electronically controlled by the engine control module (ECM) through a pulse width modulated (PWM) signal. The amount of fuel injected is determined by how long the PWM signal to the injector is on.

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The other issue with this is that Davies is the Paccar diagnostic software and other scan tools will use other generic code definitions that may not convert to Paccar codes well or at all in cases.

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Customer reply replied 9 months ago
Thank you. It's just SPN 3556 no 18 after. Ive seen that before in prior instances. Everything u have mention has been recently fixed dosers fuel and def with a 30k plus laundry list of things in the aftertreatment. Sure it's fine, just a passive thing that will resolve.

Thanks for the update the 18 is the FMI or fail mode identifier for different types of failures. If all repairs are made this may reset on its own and if not you can have the ECM reset if needed. Pleasure to help

Daniel Wilson
Category: Medium and Heavy Trucks
Satisfied Customers: 6,890
Experience: Owner at DJ Wilson
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