U0157
NetworkModule Communicationlow severityLost Communication with Digital Compass Module
What U0157 Means
Cannot communicate with the digital compass module, often integrated in the rearview mirror or overhead console.
Symptoms
- Compass display blank
- Navigation heading unavailable
- Compass reading stuck
- Overhead console display off
Common Causes
- Compass module failure
- Wiring issue
- Module power loss
- Fuse blown
- Magnetic interference
Diagnostic Steps
- Check compass module power
- Test wiring to module
- Check for magnetic interference sources
- Test module directly
Where to start: Check mirror or overhead console wiring. Compass may need calibration after repair.
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