What causes a SPN 3286 code?

SPN 3286 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 3286 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 3286 active.

How do I fix SPN 3286?

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 3286

J1939 SPN 3286 — Body/Chassis parameter

What it means

Aftertreatment 1 Intake Gas Sensor Heater - Resistance Too High. (Note: While the user specified 'Body/Chassis', SPN 3286 is standardized across many J1939 systems as the Intake NOx Sensor Heater control circuit).