What causes a P0596 code?

P0596 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 P0596 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with P0596 active.

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

OBD-II

P0596

Cruise Control Move-Up Switch Circuit High

What it means

The Engine Control Module (ECM) has detected an abnormally high voltage signal from the cruise control 'Resume/Accel' or 'Move-Up' switch circuit, indicating a possible short to power.