What causes a SPN 3281 code?

SPN 3281 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 3281 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 3281 active.

How do I fix SPN 3281?

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 3281

Particulate Matter Sensor Heater Control Circuit Fault

What it means

The Engine Control Module (ECM) has detected an open circuit, short to ground, or short to voltage in the PM sensor heater control circuit. This heater is vital to clear condensation and soot from the sensor element before accurate measurement can occur.