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2021 BMW I3
Range Extender•RWD•AUTOMATIC•hybrid
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Repairs0Labor318Torque3717Fluid6DTC2228Battery1Maintenance0Recalls0
CC-ID-177moderate severityChassis

Active Cruise Control Malfunction

on 2021 BMW i3 Range Extender · RWD

What this code means

The Active Cruise Control system has detected a fault and cannot maintain automatic distance and speed control. Raised by the ACC radar/control module.

Symptoms

  • Cruise control unavailable
  • Warning message on dashboard
  • Radar-based following disabled

Common causes

  • Blocked or dirty radar sensor
  • Radar sensor misalignment
  • ACC control module fault
  • Wiring or connector fault

Diagnostic steps

  1. Read ACC fault codes with diagnostic tool
  2. Inspect and clean radar sensor area
  3. Check radar sensor alignment
  4. Test wiring and module power supply
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