P0561Low SeverityElectrical

System Voltage Unstable

What This Means

The vehicle electrical system voltage is fluctuating excessively. Proper voltage is critical for all electronic systems and engine management.

Common Symptoms

Dim headlights
Battery light on
Electrical issues
Hard starting

Common Causes

Failing alternator
Worn drive belt
Corroded battery terminals
Weak battery
Excessive electrical load

Estimated Repair Cost

$100 – $600

Parts and labor (varies by vehicle and location)

Difficulty:Moderate

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For informational purposes only. Diagnostic trouble codes are starting points for diagnosis, not definitive answers. Always consult a certified mechanic for proper diagnosis and repair. Estimated costs vary by vehicle, location, and shop rates.