Adaptive Cruise Control Sensor Alignment
2017-2020 Toyota 86 2.0L H4
Description
The adaptive cruise control distance sensor is out of calibrated alignment.
Symptoms
- ACC unavailable message
- ACC warning light
- Cruise control not functioning
- Forward collision warning inactive
Common Causes
- Sensor misaligned after collision
- Sensor bracket bent
- Windshield replacement shifted sensor
- Front fascia repair changed sensor aim
Diagnostic Steps
- Perform ACC sensor alignment procedure
- Check sensor mounting bracket
- Inspect front fascia for damage or misalignment
- Verify sensor aim with manufacturer target and procedure
- Check for windshield-related codes if camera-based
Repair Notes
Perform ACC sensor alignment using manufacturer-specified targets and procedure.
Related Codes
Other Chassis Codes
- C0021LF Wheel Speed Sensor Range/Performance
- C0022RF Wheel Speed Sensor Range/Performance
- C0023LR Wheel Speed Sensor Range/Performance
- C0024RR Wheel Speed Sensor Range/Performance
- C0025LF Wheel Speed Sensor Circuit Intermittent
- C0026RF Wheel Speed Sensor Circuit Intermittent
- C0027LR Wheel Speed Sensor Circuit Intermittent
- C0028RR Wheel Speed Sensor Circuit Intermittent
- C0035Left Front Wheel Speed Sensor Circuit
- C0036Left Front Wheel Speed Signal Erratic
C0400 on Other Vehicles
Toyota 4Runner
2010-2024 4.0L V6
Toyota Alphard
2023-2025 2.4L I4 Turbo T24A-FTS
Toyota Alphard
2023-2025 2.5L I4 Hybrid A25A-FXS
Toyota Aqua
2011-2021 1.5L I4 Hybrid 1NZ-FXE
Toyota Aqua
2021-2025 1.5L I3 Hybrid M15A-FXE
Toyota Avalon
2005-2012 3.5L V6
Toyota Avalon
2013-2018 2.5L I4
Toyota Avalon
2013-2018 3.5L V6
Common Questions
What does code C0400 mean on a 2017-2020 Toyota 86?
C0400 stands for "Adaptive Cruise Control Sensor Alignment". The adaptive cruise control distance sensor is out of calibrated alignment.
What are the symptoms of C0400 on a Toyota 86?
Common symptoms of C0400 include: ACC unavailable message, ACC warning light, Cruise control not functioning, Forward collision warning inactive.
What causes C0400 on a 2017-2020 Toyota 86?
Common causes of C0400 include: Sensor misaligned after collision, Sensor bracket bent, Windshield replacement shifted sensor, Front fascia repair changed sensor aim.