U0506 code meaning
Invalid Data Received From Door Control Module G
What U0506 means
G is the seventh door slot and in practice belongs to cars that number their door electronics from E upwards. Ford does so with DCMG, the third of four latch modules in Mach-E, Aviator and Nautilus; Ford service messages name DCMG together with its siblings whenever latch software is updated. GM's Saab 9-5 code list contains no partner entry U0205, so the slot appears unused there. The code means a receiving controller judged DCMG's lock and door-state messages invalid, while U0205 stands for missing messages. Because e-latch doors have no mechanical outside release in normal use, a module sending bad data can leave one door that does not open from the handle or triggers door warnings.
U0506 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyMedium
- Typical labor0.3 to 2 hours
- Clears after repairWhen cleared with a scanner
Symptoms of U0506
- Door not opening with the electronic handle
- Door fault message in the cluster
Common causes of U0506
- Most likelyLatch module software needing update (Ford DCMG)
- PossibleWeak 12 V supply during locking or wake-up
- Less likelyDoor control module G internally faulty
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Door control module g
What each part of U0506 means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 06 | The exact fault in that area. |
What to do next
- Note U0506 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 U0506
What does U0506 mean?
U0506 means "Invalid Data Received From Door Control Module G". G is the seventh door slot and in practice belongs to cars that number their door electronics from E upwards. It is a generic code, so it means the same on every make.
Is it safe to drive with U0506?
U0506 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will U0506 fail an emissions test?
U0506 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 U0506 to fix?
Difficulty: medium. A typical repair takes 0.3 to 2 hours of work. This is a job for a workshop.
Will U0506 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.