Code Definition

P0563 — System Voltage High

System: Powertrain  |  Type: Generic (OBD-II Standard)  |  Make: Generic

About P0563

P0563 is a generic (obd-ii standard) powertrain diagnostic trouble code. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P0563 is stored, the module has detected a signal or supply voltage higher than the expected operating range.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

Because P0563 is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

The P0563 fault code is set when the Engine Control Module (ECM) detects that the system voltage in the vehicle is higher than the expected range. This code indicates that the voltage within the vehicle's electrical system is excessively high, which can potentially damage electrical components, including the ECM, sensors, and actuators. High system voltage can lead to various issues such as electrical component failure, erratic sensor behaviour, and potential damage to the vehicle's electrical systems. Causes of high system voltage can include a malfunctioning alternator (overcharging the batt...

Join TaT to view the complete code information and diagnostic details.

Quick Facts