U0230moderate severityNetwork
Lost Communication with Adaptive Speed Control Module
on 2017 Mazda Mazda3 2.0L I4 · FWD
What this code means
Cannot communicate with the adaptive cruise control or radar-based speed control module.
Symptoms
- Adaptive cruise control disabled
- Radar sensor warning
- ACC not available message
- Forward distance not displayed
Common causes
- ACC module failure
- CAN bus wiring
- Module power loss
- Fuse blown
- Radar sensor blocked
- Front fascia damage near sensor
Diagnostic steps
- Check ACC module fuse
- Test power and ground
- Check CAN wiring
- Clean radar sensor area
- Check for front bumper damage near sensor
- Inspect radar sensor alignment
Repair notes
Check fuses. Radar sensor behind front grille can be blocked by ice, mud, or bumper damage.
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