Network, generic

U042A Invalid Data Received From V2X Module

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

The V2X module is the radio node for vehicle-to-everything messaging with other cars, roadside units and the network, via DSRC/ITS-G5 or cellular C-V2X. U042A tells that another module gets frames from it but cannot use their content. No manufacturer documents U042A publicly. Ford's patent US 9,769,762 shows the wiring that makes such a code possible: the V2X module sits on the CAN data bus with head unit, assistance unit and other controllers, adapts its transmit power to vehicle speed and message type, and broadcasts warnings such as hard braking on request of the assistance unit. Received alerts travel the other way to display and assistance functions, and that inbound path is what U042A guards. Nothing here affects emissions, so no MIL is expected; connected warnings simply drop out. U011F is lost contact.

Likely causes

V2X module or receiver software fault
V2X module faulty, for example after a supply interruption
Antenna or positioning input problem leading to invalid status data

Symptoms

  • Connected traffic or hazard warnings missing
  • Message about unavailable connected services

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€50–900
Time0.3–2 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

v2x module

Related codes

U011FU0198

References: patents.google.com, en.wikipedia.org.