What causes a SPN 6727 code?

SPN 6727 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 6727 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 6727 active.

How do I fix SPN 6727?

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 6727

Cummins fault code 6727

What it means

VGT Actuator - Abnormal Update Rate. This indicates the Engine Control Module (ECM) has lost communication with the Variable Geometry Turbocharger (VGT) actuator via the J1939 data link.