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2021 BMW I3
Range Extender•RWD•AUTOMATIC•hybrid
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Repairs0Labor318Torque3717Fluid6DTC2228Battery1Maintenance0Recalls0
CC-ID-248high severityChassis

Brake Signal Malfunction, Gears May Be Selected Without Brake

on 2021 BMW i3 Range Extender · RWD

What this code means

This message warns of a brake signal fault that may allow gear selection without brake pedal input. It is raised by the transmission/brake interlock system.

Symptoms

  • Brake signal warning message
  • Gear shift interlock not functioning
  • Brake light circuit fault

Common causes

  • Faulty brake light switch
  • Brake switch wiring fault
  • Signal fault to transmission module
  • Blown fuse or connector issue

Diagnostic steps

  1. Scan for brake switch fault codes
  2. Test brake light switch operation
  3. Inspect brake switch wiring
  4. Verify signal to transmission module
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