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2023 CHEVROLET BOLT EUV
65 kWh Single Motor FWD•FWD•AUTOMATIC•ev
🏆Sponsored by Simon-Olivier Ricci
Repairs269Labor314Torque3680Fluid5DTC1608Battery1Maintenance0Recalls0
P0389moderate severityPowertrain

Auxiliary/Secondary Knock Sensor 2 Circuit Intermittent

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

What this code means

The PCM sees an intermittent or erratic signal from the second knock sensor circuit. The problem may come and go with vibration or temperature changes.

Symptoms

  • Intermittent check engine light
  • Occasional power loss
  • Random engine pinging

Common causes

  • Loose or corroded connector
  • Chafed sensor wiring
  • Faulty knock sensor 2
  • Loose sensor mounting

Diagnostic steps

  1. Retrieve stored and pending codes
  2. Wiggle-test sensor wiring while monitoring
  3. Inspect sensor torque and mounting surface
  4. Repair harness or replace sensor as needed
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