P1641low severityPowertrain
MIL Control Circuit
on 2023 Chevrolet Bolt EUV 65 kWh Single Motor FWD · FWD
What this code means
The PCM detected a fault in the malfunction indicator lamp control circuit. The check engine light may not illuminate properly.
Symptoms
- MIL not working
- Check engine light stays on
- Bulb check failure
Common causes
- Burned out MIL bulb
- MIL circuit wiring fault
- Faulty instrument cluster
- Faulty PCM
Diagnostic steps
- Check MIL bulb operation
- Inspect MIL control wiring
- Test cluster and PCM control circuit
- Repair wiring or replace faulty component
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