What causes a SPN 2962 code?

SPN 2962 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 2962 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 2962 active.

How do I fix SPN 2962?

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 2962

J1939 SPN 2962 — Aftertreatment/Emissions parameter

What it means

SPN 2962 typically relates to the Diesel Oxidation Catalyst (DOC) Inlet Temperature. It indicates that the temperature at the inlet of the DOC is reading outside of the expected range or is failing to respond correctly during an active regeneration cycle.