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2021 BMW I3
Range Extender•RWD•AUTOMATIC•hybrid
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Repairs0Labor318Torque3717Fluid6DTC2228Battery1Maintenance0Recalls0
CC-ID-366high severityPowertrain

Transmission Fault, Failsafe

on 2021 BMW i3 Range Extender · RWD

What this code means

A transmission fault has triggered failsafe operation, restricting normal gear function. The transmission control module raised this to safeguard the drivetrain.

Symptoms

  • Warning message on dashboard
  • Reduced power delivery
  • Stuck in a single gear

Common causes

  • Faulty valve body or solenoid
  • Contaminated transmission fluid
  • Internal mechatronic failure
  • Electrical fault in transmission harness

Diagnostic steps

  1. Read TCM fault memory
  2. Verify fluid level and quality
  3. Inspect mechatronic unit connectors
  4. Perform transmission adaptation reset
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