What causes a U0381 code?

U0381 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 U0381 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with U0381 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

Log in Sign up

OBD-II

U0381

Software Incompatibility with Driver Health Care Module

What it means

Software error for driver biometric or alertness monitoring systems. May trigger false fatigue alerts.

Sign in to view symptoms, probable causes, diagnostic steps, severity, and related codes

Log in Sign up free