C0411
ACC Radar Module Communication Fault
2012-2015 BMW 320i 2.0L I4 Turbo N20
Moderate SeverityChassisGeneric (SAE)
Description
Loss of CAN bus communication with the ACC radar module.
Symptoms
- ACC disabled
- Multiple driver assist warnings
- Forward collision alert unavailable
Common Causes
- CAN wiring fault to radar module
- Module connector disconnected
- Radar module power loss
- CAN bus termination issue at module
Diagnostic Steps
- Check CAN communication to radar module
- Inspect module connector
- Verify power and ground at module
- Check CAN bus wiring continuity
- Look for U-codes related to radar module
Repair Notes
Repair CAN bus wiring or connector. Replace module if communication chip has failed.
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
C0411 on Other Vehicles
Common Questions
What does code C0411 mean on a 2012-2015 BMW 320i?
C0411 stands for "ACC Radar Module Communication Fault". Loss of CAN bus communication with the ACC radar module.
What are the symptoms of C0411 on a BMW 320i?
Common symptoms of C0411 include: ACC disabled, Multiple driver assist warnings, Forward collision alert unavailable.
What causes C0411 on a 2012-2015 BMW 320i?
Common causes of C0411 include: CAN wiring fault to radar module, Module connector disconnected, Radar module power loss, CAN bus termination issue at module.