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2020 MAZDA MAZDA3
2.5L Skyactiv-G I4 (186 hp)•AWD•AUTOMATIC•gas
2 active safety recalls on this vehicle — view recalls
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Repairs0Labor987Torque6478Fluid16DTC2264Battery2Maintenance0Recalls2
B0460low severityBody

Infotainment System Communication Error

on 2020 Mazda Mazda3 2.5L Skyactiv-G I4 (186 hp) · AWD

What this code means

Communication loss between the infotainment head unit and other vehicle modules on the entertainment bus.

Symptoms

  • Infotainment screen blank
  • No audio output
  • Navigation not working
  • Vehicle settings inaccessible
  • Backup camera not displaying

Common causes

  • Head unit internal failure
  • CAN/MOST bus wiring issue
  • Head unit software crash
  • Power supply fault
  • Connector corrosion

Diagnostic steps

  1. Attempt system reboot (hold power button)
  2. Check head unit power and ground
  3. Scan for communication faults
  4. Inspect bus wiring
  5. Check for software updates

Repair notes

Reboot head unit first. If persistent, check bus wiring or replace head unit.

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