What causes a U3423 code?

U3423 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 U3423 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with U3423 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

U3423

Manufacturer-specific network code U3423

What it means

Communication error with the Tire Pressure Monitoring System (TPMS) receiver. The central gateway is no longer receiving radio frequency signals from the wheel sensors.