What causes a U3428 code?

U3428 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 U3428 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with U3428 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

U3428

Manufacturer-specific network code U3428

What it means

Lost communication with the Blind Spot Detection (BSD) or Blind Spot Radar. This safety system is no longer detecting vehicles on the side of the truck.