U0173
NetworkModule Communicationlow severityLost Communication With Compass Module
What U0173 Means
The network has lost communication with the compass module. Typically a wiring or module failure affecting directional display.
Symptoms
- Compass reading missing or wrong
- Display error message
- No heading shown
Common Causes
- Faulty bus wiring or connectors
- Poor ground connection
- Failed compass module
- Blown fuse
Diagnostic Steps
- Scan modules for communication codes
- Check compass module power and ground
- Inspect bus wiring and connectors
- Verify bus voltage levels
🔌 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.
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