What causes a SPN 2823 code?

SPN 2823 can be triggered by several issues — see the verified probable causes and step-by-step diagnostics shared by mechanics and owners on OBDIY.

Can I drive with a SPN 2823 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 2823 active.

How do I fix SPN 2823?

Follow the step-by-step diagnostic on this page, then read the verified fixes contributed by other Heavy Truck owners — the answer marked "Verified Cause" worked for the original poster.

OBDIY

J1939 SPN

SPN 2823

J1939 SPN 2823 — Aftertreatment/Emissions parameter

What it means

Particulate Matter (PM) Sensor Power Supply. This code typically indicates the PM sensor is not receiving sufficient voltage or there is an open circuit in the power supply line.