What causes a SPN 2815 code?

SPN 2815 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 2815 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 2815 active.

How do I fix SPN 2815?

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 2815

SPN 2815 Aftertreatment 1 Diesel Particulate Filter Intake Pressure

What it means

This fault indicates that the DPF intake pressure sensor signal is outside of the expected operating range, often due to high backpressure or sensor failure.