P0561moderate severityPowertrain
System Voltage Unstable
on 2023 Chevrolet Bolt EUV 65 kWh Single Motor FWD · FWD
What this code means
The PCM detects that system voltage is fluctuating beyond acceptable limits. Unstable voltage can affect sensor readings and module operation.
Symptoms
- Flickering lights
- Erratic gauge behavior
- Intermittent stalling
Common causes
- Faulty alternator or voltage regulator
- Loose or corroded battery connections
- Bad ground
- Failing battery
Diagnostic steps
- Monitor charging system voltage
- Check for loose connections
- Test alternator ripple and output
- Repair connections or replace alternator
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P0005
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P0026
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P0029
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P0033
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