What causes a U3490 code?

U3490 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 U3490 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with U3490 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

U3490

Manufacturer-specific network code U3490

What it means

Communication data error regarding engine torque or speed signals across the network.

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

Log in Sign up free