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P0563 - System Voltage High

Possible causes
- Battery defective
- Loose or missing alternator drive belt
- Faulty alternator
- Open or short system voltage circuit
What does this mean? What does this mean?
Tech notes
Higher than expected voltage problems are most likely caused by bad voltage regulator. The voltage regulator is part of the alternator.
What does this mean? What does this mean?
When is the code detected?
The Engine Control Module (ECM) has detected that the electrical system voltage level is out of range.
Possible symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P0563 Description

The battery supplies electricity to the Engine Control Module (ECM) even when the ignition switch is OFF. This electricity allows the ECM to store data such as Diagnostic Trouble Code (DTC) history, freeze frame data, fuel trim values and other data. If the battery voltage falls below a minimum level, the ECM will conclude that there is a fault in the power supply circuit. The next time the engine starts, the ECM will turn on the Malfunction Indicator Light (MIL) and a DTC will be set.

P0563 Information for specific makes
P0563 ACURA System Voltage High
P0563 BUICK System Voltage High
P0563 CADILLAC System Voltage High
P0563 CHEVROLET System Voltage High
P0563 CHRYSLER Battery System High
P0563 DODGE Battery System High
P0563 FORD System Voltage High
P0563 GMC System Voltage High
P0563 HONDA System Voltage High
P0563 HYUNDAI System Voltage High
P0563 ISUZU System Voltage High
P0563 JEEP Battery System High
P0563 KIA System Voltage High
P0563 MERCEDES-BENZ System Voltage High
P0563 MITSUBISHI System Voltage High
P0563 PONTIAC System Voltage High
P0563 SATURN System Voltage High
P0563 SUZUKI System Voltage High
P0563 VOLKSWAGEN System Voltage High
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