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2023 CHEVROLET BOLT EUV
65 kWh Single Motor FWD•FWD•AUTOMATIC•ev
🏆Sponsored by Simon-Olivier Ricci
Repairs269Labor314Torque3680Fluid5DTC1306Battery1Maintenance0Recalls0
P0723moderate severityPowertrain

Torque Converter/Brake Switch B Circuit Intermittent

on 2023 Chevrolet Bolt EUV 65 kWh Single Motor FWD · FWD

What this code means

The brake switch input to the transmission controller is cutting out intermittently. This affects torque converter lockup and cruise control cancel logic.

Symptoms

  • Intermittent cruise dropout
  • Torque converter lockup issues
  • Random brake light complaints

Common causes

  • Loose brake switch connector
  • Intermittent wiring fault
  • Failing brake switch
  • Faulty TCM

Diagnostic steps

  1. Retrieve codes and freeze frame
  2. Monitor brake switch input while pressing pedal
  3. Wiggle-test switch wiring
  4. Replace brake switch if intermittent
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