What causes a SPN 860 code?

SPN 860 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 860 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 860 active.

How do I fix SPN 860?

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 860

J1939 SPN 860 — Engine Management parameter

What it means

Cruise Control Resume Switch: This code indicates an electrical failure or irrational signal specifically from the 'Resume' button/switch within the Cruise Control system.