U0574 code meaning
Invalid Data Received From Lighting Driver Control Module A
What U0574 means
Lighting driver control modules switch and dim individual LEDs or LED segments in modern headlamps. Lincoln's 2025 Navigator has four of them, labelled A to D, and an over-the-air release (25.10.08) for all four adjusted headlamp color and brightness at start-up; NHTSA's summary adds an intermittent resistance fault that dropped the lamps to their lowest setting. U0574 is set when a receiver gets module A's frames but rejects the data. No maker publishes U0574 itself or partner U0273. LED matrix drivers such as TI's TPS92662 report open or shorted LEDs over a serial line, so a corrupt status message can stop adaptive light although the lamp still works. U0542 concerns headlamp control module A. No MIL.
U0574 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 U0574
- Adaptive or glare-free high beam unavailable
- Headlamp color or brightness wrong, lamps at reduced level
Common causes of U0574
- Most likelyLighting driver module software needing an update (Lincoln remedy over the air)
- PossibleMoisture or poor contact at the headlamp connector
- Less likelyLighting driver control module A internally faulty (often only with the headlamp)
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Lighting driver module a
What each part of U0574 means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 74 | The exact fault in that area. |
What to do next
- Note U0574 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 U0574
What does U0574 mean?
U0574 means "Invalid Data Received From Lighting Driver Control Module A". Lighting driver control modules switch and dim individual LEDs or LED segments in modern headlamps. It is a generic code, so it means the same on every make.
Is it safe to drive with U0574?
U0574 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will U0574 fail an emissions test?
U0574 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 U0574 to fix?
Difficulty: medium. A typical repair takes 0.3 to 3 hours of work. This is a job for a workshop.
Will U0574 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.