What causes a SPN 680 code?

SPN 680 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 680 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 680 active.

How do I fix SPN 680?

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 680

J1939 SPN 680 — Engine Management parameter

What it means

SPN 680 refers to an Engine Management Parameter error, often indicating a communication time-out or invalid data received by the engine controller regarding engine-specific configuration parameters via the J1939 data link.