P1600moderate severityPowertrain
PCM Battery Direct Power Circuit
on 2023 Chevrolet Bolt EUV 65 kWh Single Motor FWD · FWD
What this code means
The PCM detected an issue with its direct battery power supply circuit. This circuit maintains PCM memory and learned values when the ignition is off.
Symptoms
- Check Engine Light
- Lost adaptive memory
- Poor idle after battery service
- Transmission relearn needed
- Multiple codes may set simultaneously
Common causes
- Low battery voltage
- Corroded battery cables
- Loose PCM power connection
- Blown PCM power fuse
- Damaged PCM power wiring
Diagnostic steps
- Test battery voltage
- Inspect battery cable connections
- Check PCM power fuse
- Test voltage at PCM battery circuit
- Inspect PCM connector for corrosion
Repair notes
Check battery and cable connections. Verify PCM power fuse. Clean and secure all connections.
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