U042AInvalid Data Received From V2X Module
- Generic OBD-II code · Network
- How the car detects it
- 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.
- What you may notice
- Connected traffic or hazard warnings missing
- Message about unavailable connected services
- Likely causes
- PossibleV2X module or receiver software fault
- PossibleV2X module faulty, for example after a supply interruption
- RareAntenna or positioning input problem leading to invalid status data
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €50 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.