What causes a SPN 2670 code?

SPN 2670 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 2670 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 2670 active.

How do I fix SPN 2670?

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 2670

J1939 SPN 2670 — Aftertreatment/Emissions parameter

What it means

Aftertreatment DPF Intake Gas Temp 2. Measures the temperature of the gas entering the second DPF in a dual-canister system.