What causes a SPN 596 code?

SPN 596 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 596 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 596 active.

How do I fix SPN 596?

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

Log in Sign up

J1939 SPN

SPN 596

J1939 SPN 596 — Engine Management parameter

What it means

Cruise Control Enable Switch configuration mismatch or invalid network parameter response.

Sign in to view symptoms, probable causes, diagnostic steps, severity, and related codes

Log in Sign up free