What causes a SPN 2796 code?

SPN 2796 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 2796 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 2796 active.

How do I fix SPN 2796?

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 2796

Variable Geometry Turbocharger (VGT) Smart Actuator Internal Fault

What it means

The Electronic Control Module (ECM) has detected an internal hardware error or a calibration failure within the VGT actuator motor or its internal circuit board.