What causes a SPN 6090 code?

SPN 6090 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 6090 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 6090 active.

How do I fix SPN 6090?

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 6090

Cummins fault code 6090

What it means

Internal ECM/B+ Supply Error - The Engine Control Module (ECM) has detected an internal error or a power supply issue related to the internal processing of data or actuator control.