P0560: System Voltage
What to do
Have the battery and charging system tested first, particularly if several unrelated warning lights appeared together. A poor battery connection or a failing battery can produce a whole page of faults that all disappear once it is fixed.
What this code means
A general fault with the vehicle's supply voltage as seen by the control module. Not a complaint about a sensor — a complaint about the electrical foundation everything else depends on.
This matters more than its plain title suggests. Every module, sensor reference and actuator on the vehicle assumes a stable supply, and when that assumption fails the symptoms appear everywhere except where the fault is. A single bad connection at the battery can produce transmission codes, ABS codes, immobiliser faults and misfires simultaneously, none of which have anything wrong with them.
The practical rule that follows: when a scan produces a long list of unrelated faults across several modules, check the battery and charging system before diagnosing any of them. Chasing those codes individually is how a diagnosis takes three days instead of twenty minutes.
Likely causes
Start here
- Corroded battery terminals · easy
- Failing battery · easy
- Faulty alternator · moderate
- Corroded earth connection · moderate
Less common
Symptoms
Components involved
Information, not instruction
CarGeek is a reference, not a service manual. Its pages are written from public sources and from what other people have found, never from a manufacturer's own service information, so they can be wrong or incomplete for your particular vehicle. Some of what they describe carries real risk: high voltage, fuel under pressure, stored energy, hot and moving parts.
Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
Community experience
Be the first to write this up
Nothing posted about this yet. Whatever you found is worth writing down — even a dead end saves someone the same afternoon.
What makes one worth reading:
- The car — make, model, year and engine. The same fault behaves differently on each.
- What you measured, not only what you replaced.
- What actually fixed it — or that nothing did, which is worth knowing too.
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