What causes a SPN 5396 code?

SPN 5396 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 5396 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 5396 active.

How do I fix SPN 5396?

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 5396

Detroit DD13/DD15/DD16 SPN 5396

What it means

SPN 5396 FMI 7/13/14 usually refers to Diesel Exhaust Fluid (DEF) Pump Motor or Internal Component performance/integrity issues. It indicates the ACM is seeing a discrepancy in DEF pump speed or torque.