What causes a SPN 5173 code?

SPN 5173 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 5173 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 5173 active.

How do I fix SPN 5173?

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 5173

Cummins fault code 5173

What it means

VGT Actuator Motor Circuit - Abnormal Rate of Change. This indicates the actuator is unable to move the turbo vanes to the commanded position or is detecting mechanical resistance.