What causes a SPN 3073 code?

SPN 3073 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 3073 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 3073 active.

How do I fix SPN 3073?

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 3073

SPN 3073 - Engine Aftertreatment Particulate Trap Intake Pressure

What it means

Indicates that the Diesel Particulate Filter (DPF) differential pressure sensor has detected a value that is either out of range or inconsistent with engine operating conditions.