What causes a SPN 3276 code?

SPN 3276 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 3276 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 3276 active.

How do I fix SPN 3276?

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 3276

SPN 3276 Selective Catalytic Reduction (SCR) Inlet Temperature Data

What it means

Indicates a fault related to the SCR inlet temperature sensor, typically pointing to data that is erratic, intermittent, or incorrect relative to other exhaust sensors.