What causes a SPN 3270 code?

SPN 3270 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 3270 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 3270 active.

How do I fix SPN 3270?

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 3270

SPN 3270 Particulate Matter Sensor High Temperature

What it means

This fault code indicates that the Particulate Matter (PM) sensor's heater circuitry or internal sensing element has exceeded the normal operating temperature threshold.