ACC Distance Sensor Circuit
2017-2020 Ferrari 812 Superfast 6.5L V12
Description
General malfunction in the adaptive cruise control distance sensing radar or lidar unit.
Symptoms
- ACC system disabled
- Forward collision alert disabled
- Cruise control limited to non-adaptive mode
- Warning message on dash
Common Causes
- Radar/lidar unit failure
- Sensor blocked by dirt or ice
- Wiring damage to sensor
- Control module failure
Diagnostic Steps
- Clean sensor face (radar cover or camera lens)
- Check for obstructions in front of sensor
- Test sensor power supply
- Inspect wiring and connector
- Perform sensor self-test with scan tool
Repair Notes
Clean sensor area first. Replace radar/lidar unit if internal failure.
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
C0401 on Other Vehicles
Ferrari 296 GTB
2022-2024 3.0L V6 Hybrid
Ferrari 296 GTS
2022-2024 3.0L V6 Hybrid
Ferrari 458 Italia
2009-2015 4.5L V8
Ferrari 458 Speciale
2013-2015 4.5L V8
Ferrari 488 GTB
2015-2019 3.9L V8 Twin Turbo
Ferrari 488 Pista
2018-2020 3.9L V8 Twin Turbo
Ferrari 488 Spider
2015-2019 3.9L V8 Twin Turbo
Ferrari 599 GTB Fiorano
2006-2012 6.0L V12
Common Questions
What does code C0401 mean on a 2017-2020 Ferrari 812 Superfast?
C0401 stands for "ACC Distance Sensor Circuit". General malfunction in the adaptive cruise control distance sensing radar or lidar unit.
What are the symptoms of C0401 on a Ferrari 812 Superfast?
Common symptoms of C0401 include: ACC system disabled, Forward collision alert disabled, Cruise control limited to non-adaptive mode, Warning message on dash.
What causes C0401 on a 2017-2020 Ferrari 812 Superfast?
Common causes of C0401 include: Radar/lidar unit failure, Sensor blocked by dirt or ice, Wiring damage to sensor, Control module failure.