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U0199 Lost Communication With Door Control Module A

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

U0199 reports that door control module A has dropped off the bus; most makers assign it to the driver's door. Chrysler bulletin 08-061-12 (300 and Charger 2005-2010) calls it the driver door module: the front windows and central locking stop working, a one-minute battery disconnect is tried first, and the module is replaced if contact does not return. Volkswagen tech tip 97-21-02 (Atlas, Golf, Jetta, Tiguan, Taos 2019-2022) sees U019900 or U020000 with many warnings and windows moving on their own, caused by loose pins in the connector at the driver's A-pillar, on the comfort CAN lines. Ford SSM 53980 (F-Super Duty 2023-2025) blames ground G201, to be torqued to 8 Nm. U0200 to U0202 cover doors B to D, U049A invalid data. Normally no MIL.

Likely causes

Loose or backed-out pins in the door-to-body connector (VW)
Broken wires in the door hinge harness
Loose ground connection (Ford G201)
Driver door module faulty (Chrysler 300/Charger)

Symptoms

  • Power windows and locks on the door inoperative
  • Windows move on their own or several warning lamps light up
  • Mirror adjustment or switch lighting dead

Repair estimate

DifficultyMediumDIY possible
Parts and labour€0–700
Time0.5–3 h

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

Parts involved

door control modulecan bus wiring

Related codes

U0200U0201U0202U049A

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