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Doug Barnowski
Doug Barnowski,
Category: Medium and Heavy Trucks
Satisfied Customers: 6
Experience:  HD Truck Mechanic at VIP Truck Center, LLC
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I am trying to diagnose a 2008 Volvo trucks DPF regen

Customer Question

I am trying to diagnose a 2008 Volvo trucks DPF regen problem. The CAN system is telling me SPN 3712, which is "system fault active." But there is no way I can find of telling what a "system fault" is.
JA: What is the model of your '08 Volvo?
Customer: VNM42T
JA: Are you fixing your vehicle yourself? What have you tried so far?
Customer: I guess so. We have installed an aftermarket system on the truck, and are trying to figure out why the DPF regen is no longer working. It is fine on a 2010 model.
JA: Anything else you want the mechanic to know before I connect you?
Customer: I think that's the best I can offer. :-)
Submitted: 1 month ago.
Category: Medium and Heavy Trucks
Expert:  Doug Barnowski replied 1 month ago.

Hi, my name is Doug.

Can you get me the last 6 numbers of the VIN on the truck you are working on so I can look up the code?

Also the code is SPN 3712, correct?