What Is Car Fault Code P0563? Diagnose & Clear It with iCarsoft CR Pro S
If your check engine light illuminates and your diagnostic tool pulls up P0563, you’re dealing with an issue related to your vehicle’s battery voltage regulation system. This code signals an abnormal “System Voltage High” condition, meaning your car’s electrical system is receiving too much voltage—risking damage to sensitive electronics like the ECU, infotainment system, or sensors. Ignoring P0563 can lead to fried modules, erratic electrical behavior, or even battery failure. In this guide, we’ll break down what P0563 means, why it occurs, and how the iCarsoft CR Pro S—your all-in-one diagnostic solution—can help you resolve it efficiently.
iCarsoft CR Pro S testing charging system to diagnose P0563 fault code
What Exactly Is Fault Code P0563?
P0563 is a generic OBD-II trouble code defined as “System Voltage High”. Your vehicle’s charging system (alternator, voltage regulator, battery) is designed to maintain a stable voltage (typically 13.5–14.5V). When the ECU (Engine Control Unit) detects voltage exceeding this range for an extended period, it triggers P0563 to alert you to an overcharging issue.
This code applies to all vehicle types—gasoline, diesel, hybrid, and electric—since all rely on a stable electrical system. Left unaddressed, overvoltage can short-circuit critical components, leading to costly repairs.
Why Does P0563 Happen? Common Causes
P0563 typically stems from issues with the charging or voltage regulation system:
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Faulty Voltage Regulator: The regulator (built into the alternator in most modern cars) fails to limit voltage output.
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Malfunctioning Alternator: A defective alternator produces excessive voltage due to worn brushes, a shorted diode, or faulty windings.
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Wiring/Connector Issues: Damaged, crossed, or shorted wires in the charging system disrupt voltage flow.
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Faulty Battery: A damaged or aging battery can’t absorb excess voltage, causing it to spike.
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ECU Malfunction: Rarely, the ECU incorrectly interprets voltage readings (though this is less common).
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Aftermarket Electrical Add-Ons: Poorly installed accessories (e.g., high-powered lights, amplifiers) can overload the charging system.
Why the iCarsoft CR Pro S Is Ideal for P0563
When it comes to diagnosing and fixing P0563, the iCarsoft CR Pro S outperforms basic scanners by offering deep electrical system insights and global compatibility. Here’s why it’s your best tool:
Full Electrical System Scans
Unlike basic scanners that only read the code, the CR Pro S dives into the charging system, checking the alternator, voltage regulator, battery, and wiring.
Live Data Monitoring
View real-time battery voltage and alternator output to verify if levels are abnormally high (above 14.5V).
Battery Management Service
The CR Pro S includes specialized functions to evaluate battery charge state, monitor close-circuit current, and register battery replacements—critical for resolving P0563.
Global Vehicle Support
Works with over 60 makes (Ford, Toyota, BMW, Honda, Mercedes-Benz, etc.)—P0563 is no match for its wide compatibility.
One-Click Code Clear
After fixing the issue, erase P0563 and turn off the check engine light in seconds.
Lifetime Free Updates
Stay compatible with new electrical system designs and code definitions.
Feedback Function
Get customized repair suggestions from certified professionals tailored to your car’s make and model.
How to Diagnose & Fix P0563 with the CR Pro S (Step-by-Step)
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1. Connect the CR Pro S
Plug the tool into your car’s OBD-II port (under the dashboard) and turn on the ignition.
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2. AutoVIN Identify
The tool automatically detects your vehicle’s details—no manual entry needed.
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3. Scan for Codes
Select “Full System Scan” or “Electrical System Scan” to retrieve P0563 and related codes (e.g., P0562 for low voltage, P0620 for alternator issues).
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4. Check Live Data
Monitor battery voltage and alternator output—consistently above 14.5V confirms an overcharging problem.
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5. Test Battery Health
Use the CR Pro S’s Battery Management Service to evaluate the battery’s ability to hold a charge.
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6. Fix the Root Cause
Replace the voltage regulator/alternator, repair wiring, or replace a faulty battery (based on your findings).
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7. Clear the Code
Use the “Erase Codes” function to reset P0563 and the check engine light.
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8. Re-Scan & Verify
Run a follow-up scan after driving to ensure the code doesn’t return—confirm the electrical system is stable.
FAQs About P0563 & the iCarsoft CR Pro S
Q: Can I drive with P0563?
A: It’s not recommended—overvoltage can damage electronics. Drive only short distances to diagnose with the CR Pro S.
Q: Will the CR Pro S work with my car to diagnose P0563?
A: Yes! The CR Pro S supports over 60 global makes and all 1996+ OBD-II compliant vehicles—gasoline, diesel, hybrid, or electric.
Q: Do I need mechanical experience to use the CR Pro S for P0563?
A: No! The tool’s 5-inch touchscreen, AutoVIN function, and clear instructions make it user-friendly for beginners. It highlights electrical components for easy reference.
Q: Can the CR Pro S distinguish between a faulty alternator and battery?
A: Absolutely. Live data shows alternator output—if it’s too high, the alternator/regulator is faulty; if the battery can’t hold charge, it needs replacement.
Q: After fixing P0563, will the CR Pro S clear the code permanently?
A: Yes—once the root cause (e.g., faulty alternator, damaged wiring) is addressed, the “Erase Codes” function clears P0563 permanently. If it returns, the issue wasn’t fully resolved.
Q: Is the CR Pro S better than a basic scanner for P0563?
A: Basic scanners only show P0563—they can’t monitor real-time voltage or test battery health. The CR Pro S identifies why the code occurred, saving you from unnecessary part replacements.
Q: Does the CR Pro S support hybrid/electric vehicles with P0563?
A: Yes! Hybrids/evs rely on stable voltage for their high-voltage systems, and the CR Pro S includes specialized diagnostic functions to handle P0563.
Q: How often should I update the CR Pro S for P0563 diagnostics?
A: The CR Pro S offers lifetime free Wi-Fi updates—update every 3–6 months to ensure compatibility with new electrical technologies and code definitions.
Final Thoughts: Don’t Let P0563 Damage Your Car’s Electronics
Fault code P0563 may seem like a minor electrical issue, but it poses a major risk to your vehicle’s sensitive components. With the iCarsoft CR Pro S, you can diagnose and fix it from your garage—no expensive dealership visits required. Its deep electrical system coverage, live data monitoring, and battery management features take the guesswork out of repairs, whether you’re a DIY enthusiast or professional mechanic.
Invest in the iCarsoft CR Pro S today to tackle P0563 and hundreds of other electrical-related codes—keep your car’s electronics safe and your vehicle running reliably.
