Failing alternator or voltage regulator; Weak battery or bad terminal connections; Poor ground connection.

P0563: System voltage high

System voltage high: The electrical system voltage is higher than normal, often from a faulty voltage regulator in the alternator.

Fix soon. Usually drivable for a short time, but get it checked soon. Ignoring it can waste fuel, raise emissions and lead to more damage.

Fix soonSystem: Electrical

What P0563 means

The electrical system voltage is higher than normal, often from a faulty voltage regulator in the alternator.

Fix soon. Usually drivable for a short time, but get it checked soon. Ignoring it can waste fuel, raise emissions and lead to more damage.

Write down the code and any symptoms you notice.
Check the simple things first: the fuel cap, loose connectors and fluid levels where they apply.
Do not just clear the code. If the light comes back, the cause is still there and needs a proper diagnosis.
Read live data and freeze frame data with an OBD-II scanner app to see what the car was doing when the code was set.

DriveHub connects to a $15 to $30 OBD-II adapter, reads the code from your car and explains it in plain English. iPhone and Android.

General information, not a diagnosis. Causes vary by make, model and engine. If you are unsure, have the car inspected.