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2017 TOYOTA AVALON
2.5L I4•FWD•AUTOMATIC•gas
2 active safety recalls on this vehicle — view recalls
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Repairs0Labor474Torque658Fluid7DTC1945Battery1Maintenance0Recalls2
C0440critical severityChassis

Automatic Emergency Braking System Fault

on 2017 Toyota Avalon 2.5L I4 · FWD

What this code means

General malfunction in the automatic emergency braking system.

Symptoms

  • AEB warning light
  • Automatic braking disabled
  • Forward collision mitigation unavailable
  • Driver assist systems degraded

Common causes

  • Radar module fault
  • Camera system error
  • Brake system unable to support AEB
  • Module communication failure

Diagnostic steps

  1. Check for radar and camera codes
  2. Verify ABS/brake system is fully functional
  3. Test communication between AEB controller and brake module
  4. Inspect all AEB-related sensors
  5. Check for software updates

Repair notes

Diagnose root sensor or brake system fault. AEB relies on both detection and braking subsystems.

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