What causes a P1726 code?

P1726 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 P1726 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with P1726 active.

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

OBD-II

P1726

EMPRD P3 governor slow response diagnosis

What it means

The engine's EMPRD (governor) is responding too slowly to the Engine Control Module's (ECM) commands. This mechanism regulates exhaust gas flow for emission control and engine braking performance.