U0275 code meaning
Lost Communication With Lighting Driver Control Module C
What U0275 means
Driver module C is the third LED driver unit a lamp controller can address. Three or more of them appear where each headlamp has several separately driven zones, as on the 2025 Lincoln Navigator, whose release notes name LDCMC alongside A, B and D. U0275 means the controller no longer receives C's messages; the reason may be the bus, the supply or the module. Driver controllers such as TI's TPS92682-Q1 have a limp-home pin that, when raised, makes them run on a separate set of preset values, so a lamp section can keep working without network commands. Neither U0275 nor the lamp section behind letter C is described in any public service text. Expect a lighting warning and lost adaptive features.
U0275 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyMedium
- Typical labor0.3 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of U0275
- Part of the headlamp light pattern missing or static
- Warning for lighting system
Common causes of U0275
- Most likelyLamp harness or connector to module C damaged (e.g. after front-end repair)
- PossiblePower or ground of module C interrupted
- Less likelyModule C internally faulty or overheated
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Lighting driver module cVehicle bus wiring
What each part of U0275 means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 75 | The exact fault in that area. |
What to do next
- Note U0275 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 U0275
What does U0275 mean?
U0275 means "Lost Communication With Lighting Driver Control Module C". Driver module C is the third LED driver unit a lamp controller can address. It is a generic code, so it means the same on every make.
Is it safe to drive with U0275?
U0275 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will U0275 fail an emissions test?
U0275 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 U0275 to fix?
Difficulty: medium. A typical repair takes 0.3 to 3 hours of work. This is a job for a workshop.
Will U0275 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.