What causes a P1722 code?

P1722 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 P1722 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with P1722 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

P1722

BPVDD back pressure valve diagnostic

What it means

The Back Pressure Valve (BPV), used for thermal management and engine braking, is not reaching its commanded position or responding correctly to the ECM.