P0561
System Voltage Unstable
P0561 is an OBD-II diagnostic trouble code meaning: System Voltage Unstable. Common causes: faulty generator, battery problems. Estimated repair cost: $56–167.
Symptoms
- Unstable engine operation
- Startup problems
- Dashboard flashing or turning off
- Reduced system efficiency
Causes
- Faulty generator
- Battery problems
- Damaged wiring harness
- Battery terminal corrosion
- Faulty relays or fuses
How to Fix
- Check the voltage on the battery with the engine running (should be 13.5-14.5 V)
- Inspect the battery terminals for corrosion
- Check the condition of the alternator belt
- Diagnose the generator for faults
- Check wiring harness for damage
Related codes
Error P0561 by Vehicle Brand
FAQ
What does the P0561 code mean?
P0561 is an OBD-II diagnostic trouble code that indicates: System Voltage Unstable
What causes a P0561 error code?
The most common causes of P0561 include: Faulty generator; Battery problems; Damaged wiring harness; Battery terminal corrosion.
How do I fix a P0561 diagnostic trouble code?
To fix P0561: Check the voltage on the battery with the engine running (should be 13.5-14.5 V). Inspect the battery terminals for corrosion. Check the condition of the alternator belt. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P0561?
Limited driving only, diagnose soon
How much does it cost to fix P0561?
The estimated repair cost for P0561 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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