Network, generic

U0506 Invalid Data Received From Door Control Module G

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

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.

Likely causes

Latch module software needing update (Ford DCMG)
Weak 12 V supply during locking or wake-up
Door control module G internally faulty

Symptoms

  • Door not opening with the electronic handle
  • Door fault message in the cluster

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€0–400
Time0.3–2 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

door control module g

Related codes

U0205U0505U050C

References: static.nhtsa.gov, static.nhtsa.gov.