U0201Lost Communication With Door Control Module C
- Generic OBD-II code · Network
- How the car detects it
- U0201 stands for door control module C, in the generic list the next door unit after driver (A) and front passenger (B), so on four-door cars usually a rear door. Audi, for example, gives each rear door its own controller (J388, J389, diagnostic addresses 00BB and 00BC), and its Q3 bulletin 2063376 deals with their child lock motors, but no Audi document names U0201. No manufacturer documents this code publicly. The number also has a history: GM's 2011 code list for the Saab 9-5 assigns U0201 to the transfer case controller instead, so on older GM vehicles the scan tool's own text decides. Where it means a door, expect a rear window, lock or child lock that no longer responds; a chafed harness at the door hinge is a frequent reason. U0502 covers invalid data.
- What you may notice
- Rear window, lock or child lock inoperative
- Door or child lock warning in the cluster
- Likely causes
- LikelyChafed or broken wires in the rear door hinge harness
- PossibleLoose or corroded pins in the door connector
- RareRear door control module faulty
- Repair
- Medium · Often possible to do yourself.Typical cost: €0 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.