What causes a SPN 3089 code?

SPN 3089 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 3089 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 3089 active.

How do I fix SPN 3089?

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 3089

J1939 SPN 3089 — Body/Chassis parameter

What it means

Particulate Trap Inlet Pressure (DPF Inlet Pressure) signal voltage is too low, too high, or erratic. This sensor measures the pressure of exhaust gas entering the Diesel Particulate Filter.