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2021 BMW I3
Range Extender•RWD•AUTOMATIC•hybrid
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Repairs0Labor318Torque3717Fluid6DTC2228Battery1Maintenance0Recalls0
CC-ID-404moderate severityBody

Trailer Left Indicator/Brake Light Fault

on 2021 BMW i3 Range Extender · RWD

What this code means

A fault has been detected in the trailer's left indicator or brake light circuit. This is raised by the trailer lighting module when towing.

Symptoms

  • Left trailer indicator not working
  • Left trailer brake light out
  • Faster indicator flash rate

Common causes

  • Blown left trailer bulb
  • Corroded trailer connector
  • Damaged left-side wiring
  • Faulty trailer module

Diagnostic steps

  1. Inspect left trailer bulbs
  2. Check trailer connector contacts
  3. Test left circuit continuity
  4. Scan trailer module for faults
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