What causes a SPN 523611 code?

SPN 523611 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 523611 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 523611 active.

How do I fix SPN 523611?

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 523611

Transmission Park Brake Circuit Fault

What it means

This code signifies an issue with the electrical circuit related to the transmission's park brake or its sensor/switch. This can prevent shifting or release of the park brake.