U0211
NetworkModule Communicationlow severityLost Communication With Door Switch B
What U0211 Means
The network lost communication with door switch B. Door open detection and related features may fail.
Symptoms
- Incorrect door ajar indicator
- Dome light stays on or off
- Alarm triggers falsely
Common Causes
- Faulty door switch B
- Broken wire in door boot
- Corroded connector
- Fuse failure
Diagnostic Steps
- Retrieve stored fault codes
- Inspect wiring through door boot
- Check connector integrity
- Verify switch signal with scan tool
🔌 Don't have a code reader?
Any of these will read and clear this code — pick by how deep you want to go.
Budget handheld~$40
ANCEL AD410 →
No-phone-needed handheld — reads, clears, live data, freeze frame.
✓ ANCEL official store
Serious DIY~$100
BlueDriver Pro →
Enhanced codes (ABS, airbag, TPMS) plus repair reports.
SHOP FAVORITEShop-grade tablet~$300
Autel MaxiCOM MK808S →
Bidirectional tests, service resets, all systems.
✓ Autel official store
Pro diagnostics$1,500+
Autel MaxiSys MS906 Pro →
Full-system pro platform — topology mapping, ECU coding, the works.
✓ Autel official store
As an Amazon Associate and Autel/ANCEL partner, OLP earns from qualifying purchases — how we link. This never changes the specs we publish.
Community Confirmed Fixes
No confirmed fixes yet for this code. Be the first to contribute!
Submit a FixFound a Fix for U0211?
Help other technicians by sharing what worked on your vehicle.
Submit Your Fix