What causes a SPN 586 code?

SPN 586 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 586 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 586 active.

How do I fix SPN 586?

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 586

J1939 SPN 586 — Engine Management parameter

What it means

SPN 586 refers to an 'Engine Management' parameter error, indicating that the engine's operational configuration data (such as governor settings, speed limits, or torque curves) is inconsistent or unreadable.