P0563: System Voltage High
6 vehicles · 6 makes · $140-$3,000 repair
Most Reported On
P0563 is an OBD-II diagnostic trouble code meaning “System Voltage High.” This code indicates the engine computer detected that the vehicle's system (battery) voltage is higher than the normal operating range. The PCM monitors charging system voltage, and persistently high voltage usually points to an overcharging condition. Excessive voltage can damage the battery, sensitive electronics, and lighting if left unaddressed. This code is most commonly reported on 2015-2022 Ford Transit, 2008-2023 Dodge Challenger (SXT, GT, R/T, R/T Scat Pack, SRT 392, SRT Hellcat, SRT Hellcat Redeye), and 2008-2017 Honda Accord, plus 3 other vehicles, with repair costs ranging from $140 to $3,000.
Common Causes
Typical Repair Cost
Based on 8 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
To diagnose P0563, you'll need an OBD-II scanner. Here are our recommendations at every price point.
ANCEL AD310 Classic OBD-II Scanner
by ANCEL
A simple, affordable code reader that reads and clears check engine codes. Great for quick diagnostics on any OBD-II vehicle (1996+).
- Read & clear engine codes
- View freeze frame data
- I/M readiness status
- No batteries or app needed
BlueDriver Pro Bluetooth Scanner
by BlueDriver
Bluetooth OBD-II scanner with a free companion app. Provides enhanced diagnostics, smog readiness, and repair reports sourced from a database of verified fixes.
- Enhanced diagnostics (ABS, SRS, transmission)
- Repair Reports with verified fixes
- Smog check readiness
- Free app (iOS & Android)
LAUNCH CRP123X OBD-II Scanner
by LAUNCH
A professional-grade handheld scanner that reads all four major systems (engine, transmission, ABS, SRS) with live data streaming and graphing.
- Engine, transmission, ABS, SRS diagnostics
- Live data stream & graphing
- AutoVIN for vehicle identification
- Free lifetime updates via Wi-Fi
Autel MaxiCOM MK808S Diagnostic Tool
by Autel
Shop-level diagnostic tablet with bi-directional control, active tests, and full system coverage. Ideal for serious DIYers and small shops.
- All-system diagnostics (25+ modules)
- Bi-directional control & active tests
- Oil reset, EPB, BMS, TPMS, injector coding
- 7-inch touchscreen with Android OS
As an Amazon Associate, we earn from qualifying purchases. Prices are approximate and may vary.
Vehicles Affected (6)
Battery Drain / Parasitic Draw — Battery Dead Overnight or After Sitting
Sudden alternator failure causing stall, electrical loss, and fire risk (Recalls 14V634 & 17V435)
Dodge Challenger Engine Stalls / Shuts Off While Driving (Alternator & TIPM/Fuel-Pump-Relay Failure)
FAQ
What does P0563 mean?
P0563 stands for "System Voltage High." This code indicates the engine computer detected that the vehicle's system (battery) voltage is higher than the normal operating range. The PCM monitors charging system voltage, and persistently high voltage usually points to an overcharging condition. Excessive voltage can damage the battery, sensitive electronics, and lighting if left unaddressed.
What are the most common causes of P0563?
The most common causes of P0563 are: Faulty voltage regulator in the alternator, Overcharging alternator, Poor ground or wiring connection at the alternator/battery, Faulty battery, Corroded battery terminals, PCM or charging-control module fault. The specific cause varies by vehicle.
How much does it cost to fix P0563?
Repair costs for P0563 range from $140 to $3,000, depending on the vehicle and root cause.
Which vehicles are affected by P0563?
Au7o has documented P0563 across 6 vehicle models from 6 manufacturers: Dodge, Ford, Honda, Infiniti, Jeep, Toyota.
Sources (12)
- videoYouTube - Diagnosing and Replacing a Ford Transit Alternator (Known Channel)
- ForumParasitic Battery Drain — Dodge Challenger Forum (ChallengerTalk)
- Forum2016 Challenger Parasitic Battery Drain — SRT Hellcat Forum
- ForumIntercooler Aux Pump Not Shutting Off (P023B / U02A9) — SRT Hellcat Forum
- article14 Complaints: 2017 Dodge Challenger Electrical System Problems — CarComplaints.com
- articleBattery Dead Problems of Dodge Challenger (18 owner reports) — CarProblemZoo
- articleDodge Challenger Battery Draining: Causes + Diagnosis — Drivetrain Resource
- RecallNHTSA Recall 14V-634: Chrysler/Dodge/Jeep Alternator Sudden Failure (Part 573 Safety Recall Report)
- RecallRepairPal: Recall 14V634000 — Alternator Failure, Chrysler/Dodge/Jeep
- RecallNHTSA Recall 17V-435: Alternator Diode Thermal Fatigue (3.6L/5.7L, EHPS, expanded population)
- RecallJustia Auto Recalls: 2012 Dodge Challenger Alternator Recall 17V435000
- ForumCarComplaints.com — 2012 Dodge Challenger Alternator Went Out (owner complaints)
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.