U011F code meaning
Lost Communication With V2X Module
What U011F means
U011F concerns the V2X module, the radio unit through which a car exchanges messages with other vehicles, roadside infrastructure, pedestrians' devices or the network (vehicle-to-everything), either via short-range DSRC/ITS-G5 or via cellular C-V2X. It passes alerts such as an approaching hazard or signal-phase information on to the driver and to assistance systems. Another module stores U011F once the V2X unit's periodic frames stop. No manufacturer documents the code publicly; since the module has no role in emission control, a MIL is not expected. U042A covers invalid V2X data, U0198 a lost telematics module. For the driver the connected warnings simply disappear, sometimes with a cluster message; the car drives normally.
U011F at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyMedium
- Typical labor0.5 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of U011F
- Connected traffic and hazard warnings unavailable
- Possible service message in the cluster
Common causes of U011F
- Most likelyV2X module without power or ground
- PossibleDamaged bus wiring or connector, e.g. after roof or antenna work
- PossibleSoftware or configuration fault in the V2X or gateway module
- Less likelyV2X module internally faulty
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
V2x moduleCAN bus wiring
What each part of U011F means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 1F | The exact fault in that area. |
What to do next
- Note U011F and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about U011F
What does U011F mean?
U011F means "Lost Communication With V2X Module". U011F concerns the V2X module, the radio unit through which a car exchanges messages with other vehicles, roadside infrastructure, pedestrians' devices or the network (vehicle-to-everything), either via short-range DSRC/ITS-G5 or via cellular C-V2X. It is a generic code, so it means the same on every make.
Is it safe to drive with U011F?
U011F does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will U011F fail an emissions test?
U011F is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is U011F to fix?
Difficulty: medium. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will U011F clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.