U0200low severityNetwork
Lost Communication with Headlamp Leveling Module
on 2021 Mazda Mazda3 2.5L Turbo I4 · FWD
What this code means
Cannot communicate with the automatic headlamp leveling control module.
Symptoms
- Headlight level warning
- Headlights aimed incorrectly
- Auto-leveling not functioning
- Headlight error message
Common causes
- Headlamp leveling module failure
- CAN bus wiring
- Module power loss
- Fuse blown
- Leveling motor failure
- Height sensor issue
Diagnostic steps
- Check leveling module fuse
- Test power and ground
- Check CAN wiring
- Test leveling motors
- Check ride height sensor input
Repair notes
Check fuses and headlamp leveling motors. System uses suspension height sensors for input.
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