What causes a P1022 code?

P1022 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 P1022 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with P1022 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

P1022

BPV CAN sensor current too high

What it means

The Engine Control Module (ECM) detects an amperage draw from the Bypass Valve (BPV) actuator that exceeds calibrated limits, indicating a short circuit.