Running a regen is an easy out to deal with aftertreatment issues, but even if it fixes the problem in the short term, you’re sure to see that same truck back in the shop with the same set of aftertreatment-related faults. You need to get to the root of the aftertreatment system’s problem, and the cause might surprise you. There’s a good chance it could be based in the truck’s electrical system. Inadequate power to the aftertreatment system can trigger faults.

The first step should be shoring up your electrical system preventative maintenance to stop the faults before they happen. Be sure to:

• Completely clean batteries and battery boxes;
• Remove and clean all cable ends and replace all bad ends;
• Load test each battery on the lead portion of studs or install lead cones;
• Replace batteries that do not hold a 9.5-volt load (approximately 300 amps for 15 seconds – maximum loss of 3 volts); and
• Check for chafed cables and hold downs.

For more on how the electrical system can impact aftertreatment faults, watch the video above, which features fault code troubleshooting tips from Jason Hedman, JPro product manager with Noregon.

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