What causes a SPN 565 code?

SPN 565 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 565 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 565 active.

How do I fix SPN 565?

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 565

J1939 SPN 565 — Engine Management parameter

What it means

SPN 565 indicates a conflict or failure in the Brake Switch signal received by the Engine Management system, often used for cruise control cutout or engine braking control.