What causes a SPN 520253 code?

SPN 520253 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 520253 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 520253 active.

How do I fix SPN 520253?

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 520253

Software Reset Detected

What it means

The MCM (Motor Control Module) has detected an unexpected software reboot or an interruption in the continuous power supply required to maintain operation.