P0561
PowertrainCharging Systemmoderate severitySystem Voltage Unstable
What P0561 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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