Free API
P0563high severityPowertrain

System Voltage High

on 2015 Kia Forte 1.8L I4 · FWD

What this code means

The system voltage is above the acceptable threshold.

Symptoms

  • Check Engine Light
  • Bulbs burning out frequently
  • Battery swelling
  • Electrical component damage

Common causes

  • Faulty voltage regulator
  • Faulty alternator
  • Bad battery sense wire
  • PCM-controlled charging issue

Diagnostic steps

  1. Test voltage at battery (should not exceed 15V)
  2. Test alternator regulator
  3. Check battery sense wire
  4. Test charging system

Repair notes

Overcharging can damage battery and electronics. Replace alternator/regulator. Urgent repair.

Other Powertrain codes on this vehicle

🔧 Built by master technician Chris Hackleman · Master Technician · 20+ years. Spot an error? Use the Help link above — a human reads every report.
Stuck on this repair? Take it to The Diag Desk — ask a master tech about this exact car → real human answer within 24h, never AI
🔓 LIBERATED FOREVER
The 2015 Kia Forte 1.8L I4 repair data is free for every DIYer and shop on earth, permanently, because Simon-Olivier Ricci paid $99 to unlock it.
Mitchell1 charges $169/mo for this. ALLDATAdiy charges $30/yr per vehicle. Open Labor Project is free permanently, because of community sponsors like Simon-Olivier.
Free another vehicle →
Building an app?
Free API access to all this data — 10 requests/day, no card required.
Get an API key →
Run a shop?
Manage repairs, estimates, and customers with Auto Shop Base — $249/mo, all features included.
Try Auto Shop Base →