U0220
NetworkModule Communicationhigh severityLost Communication With Zone Module A
What U0220 Means
The network has lost communication with zone module A, which controls a group of electrical functions. Multiple systems in that zone may stop working.
Symptoms
- Several functions inoperative
- Multiple warning lights
- Erratic electrical behavior
Common Causes
- Faulty zone module A
- Wiring or connector damage
- Module power or ground loss
- Blown fuse
Diagnostic Steps
- Scan all modules for codes
- Check zone module power and ground
- Inspect harness and connectors
- Test CAN bus at module
🔌 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 U0220?
Help other technicians by sharing what worked on your vehicle.
Submit Your Fix