What causes a SPN 523820 code?

SPN 523820 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 523820 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 523820 active.

How do I fix SPN 523820?

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 523820

Brake lining remaining

What it means

This code indicates that the brake lining material on one or more wheels is approaching its wear limit, requiring inspection and potential replacement. The likely root cause is normal wear and tear over time.