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P0563 P0xxx · パワートレーン (P) 重大度高
System Voltage High
The ECU sees charging voltage above roughly 16 V. Overcharging boils the battery and can damage sensitive electronics across the vehicle.
重大度の目安: 高 — 走行を止めてすぐに診断してください。さらに損傷が広がる恐れがあります
確認できる症状
- Bulbs burning out repeatedly
- Battery boiling or swollen case
- Warning lights across modules
- Burnt electronics smell
主な原因
可能性の高い順に並んでいます。上から順に確認してください。
- 1 Failed voltage regulator inside the alternator
- 2 Faulty battery temperature or voltage sensing
- 3 Bad earth or sensing wire
- 4 Aftermarket charging modifications
点検・修理の手順
費用が安く侵襲の小さい項目から — これらのコードの大半は部品の問題ではありません。
- ✓ Measure battery voltage with the engine running — above 15.5 V confirms overcharging.
- ✓ Check the alternator's sensing wire and main earth connections.
- ✓ Load-test the battery; a failing battery can also confuse smart regulators.
- ✓ Inspect for aftermarket audio or lighting wiring that affects sensing.
修理の選択肢
- Replace or repair the alternator/regulator
- Repair the sensing wire or earth
- Replace a damaged battery
P0563 — よくあるご質問
Is it urgent? +
Yes. Sustained overvoltage destroys the battery and can take out ECUs and infotainment modules.
Can a jump-start cause it? +
No, but a deeply discharged battery makes a smart regulator push hard — test the battery before replacing the alternator.