P0562 🟡 Moyen ✅ Can drive (carefully)

System Voltage Low — Battery/Alternator

The on-board voltage is consistently below 10V. The alternator is not charging properly, or the battery is failing.

💷

Average repair cost

£50 — £350

🔍 Symptoms

  • → Battery warning light on
  • → Check engine light on
  • → Radio/AC cutting out
  • → Dimming headlights

⚙️ Common Causes

  1. 1Failing battery (sulphated cells)
  2. 2Alternator not charging
  3. 3Slipping or broken alternator belt
  4. 4Poor earth/ground connection

🔧 Recommended Fixes

  1. 1Test battery voltage (>12.4V at rest, >13.5V with engine running)
  2. 2Replace battery (~£50-120)
  3. 3Check alternator belt and output
  4. 4Clean battery terminals

🛒 Recommended Parts (Amazon UK)

Car battery 60Ah (Varta/Bosch)~£55-90
View on Amazon UK →
Battery & alternator tester~£12-22
View on Amazon UK →
Battery conditioner/charger~£22-35
View on Amazon UK →

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Frequently Asked Questions

Can I clear this code without fixing it?

Yes, but it will return if the underlying issue isn't fixed. Clearing a code only tells you if the problem is permanent or intermittent.

Will this code fail an MOT?

Probably yes if the check engine light is on during the MOT. The MOT checks OBD readiness monitors since 2018.