What causes a SPN 5600 code?

SPN 5600 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 5600 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 5600 active.

How do I fix SPN 5600?

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 5600

Cummins fault code 5600

What it means

Aftertreatment Particulate Matter Sensor - Abnormal Regeneration Rate. The engine control module (ECM) has detected that the PM sensor is not regenerating (cleaning its internal element) at the expected rate.