P0563
High SeveritySystem Voltage High
Electrical System
What Does P0563 Mean?
Charging system voltage is too high, potentially damaging electrical components.
Common Fix
Replace alternator
Estimated Cost (DIY)
$150 - $300
Symptoms
- ⚠️Bright/flickering lights
- ⚠️Burning smell from electronics
- ⚠️Battery swelling
- ⚠️Blown bulbs
Common Causes
How to Diagnose P0563
- 1Measure voltage at battery (should be 13.5-14.5V running)
- 2If over 15V, voltage regulator has failed
- 3Check ground connections
- 4Replace alternator
OEM Diagnostic Flowchart
Scroll to load technician if/then branches.
Test your battery and charging system before replacing parts.
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Related Resources
Repair guides, symptom pages, and wiring diagrams related to P0563.
Exact Repair Workflows
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Open the exact repair flow most commonly associated with P0563 on this vehicle.
Open the exact repair flow most commonly associated with P0563 on this vehicle.
Open the exact repair flow most commonly associated with P0563 on this vehicle.
Open the exact repair flow most commonly associated with P0563 on this vehicle.
Open the exact repair flow most commonly associated with P0563 on this vehicle.
OEM Manual Evidence
Browse →A L L Diagnostic Trouble Codes ( DTC ) — 2013 GMC Truck Yukon XL Denali AWD V8-6.2L Service Manual | Operation CHARM Operation CHARM : Car...
A L L Diagnostic Trouble Codes ( DTC ) — 2013 GMC Truck Yukon XL Denali 2WD V8-6.2L Service Manual | Operation CHARM Operation CHARM : Car...
A L L Diagnostic Trouble Codes ( DTC ) — 2013 GMC Truck Yukon XL 4WD V8-6.0L Service Manual | Operation CHARM Operation CHARM : Car repair...
A L L Diagnostic Trouble Codes ( DTC ) — 2013 GMC Truck Yukon XL 4WD V8-5.3L Service Manual | Operation CHARM Operation CHARM : Car repair...
Exact Vehicle Hubs
Browse →Open the exact vehicle hub for a repair workflow commonly associated with P0563.
Open the exact vehicle hub for a repair workflow commonly associated with P0563.
Open the exact vehicle hub for a repair workflow commonly associated with P0563.
Open the exact vehicle hub for wiring diagnosis commonly associated with P0563.
Open the exact vehicle hub for wiring diagnosis commonly associated with P0563.
Open the exact vehicle hub for wiring diagnosis commonly associated with P0563.
Wiring Diagram Paths
Browse →Open the exact alternator diagram cluster for a vehicle that commonly triggers P0563.
Open the exact alternator diagram cluster for a vehicle that commonly triggers P0563.
Open the exact alternator diagram cluster for a vehicle that commonly triggers P0563.
Open the exact alternator diagram cluster for a vehicle that commonly triggers P0563.
Open the exact alternator diagram cluster for a vehicle that commonly triggers P0563.
Open the exact alternator diagram cluster for a vehicle that commonly triggers P0563.
Related Codes
Frequently Asked Questions
- Is overcharging dangerous?
- Yes — voltage above 15V can damage the battery, ECM, and other electronics. Fix immediately.
- Can I just replace the voltage regulator?
- On some older vehicles yes. On most modern cars, the regulator is inside the alternator and the whole unit must be replaced.
Related Repair Guides
If your vehicle has triggered P0563, these DIY repair guides may help: