U0157low severityNetwork
Lost Communication with Digital Compass Module
on 2019 Mazda Mazda3 2.5L I4 · FWD
What this code 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
Repair notes
Check mirror or overhead console wiring. Compass may need calibration after repair.
Other Network codes on this vehicle
U0001
High Speed CAN Communication Bus
U0002
High Speed CAN Communication Bus Performance
U0003
High Speed CAN Communication Bus (+) Open
U0004
High Speed CAN Communication Bus (+) Low
U0005
High Speed CAN Communication Bus (+) High
U0006
High Speed CAN Communication Bus (-) Open
U0007
High Speed CAN Communication Bus (-) Low
U0008
High Speed CAN Communication Bus (-) High
U0009
High Speed CAN Communication Bus Shorted Together
U0010
Medium Speed CAN Communication Bus