What causes a SPN 5319 code?

SPN 5319 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 5319 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 5319 active.

How do I fix SPN 5319?

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 5319

Detroit DD13/DD15/DD16 SPN 5319

What it means

Aftertreatment Fuel Line Pressure - Low. This code indicates that the pressure in the hydrocarbon (DPF dosing) fuel line did not reach the expected threshold during a regeneration event.