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2010 BMW M3 E90
4.0L V8 S65•RWD•DCT•gas•S65B40
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Repairs0Labor493Torque3437Fluid8DTC1459Battery1Maintenance0Recalls0
P0562moderate severityPowertrain

System Voltage Low

on 2010 BMW M3 E90 4.0L V8 S65 · RWD

What this code means

The system voltage is below the acceptable threshold.

Symptoms

  • Check Engine Light
  • Battery light on
  • Dim lights
  • Electrical accessories malfunctioning
  • Hard starting

Common causes

  • Weak battery
  • Faulty alternator
  • Corroded battery terminals
  • Loose serpentine belt
  • Bad ground connection

Diagnostic steps

  1. Test battery voltage (should be 12.6V static, 13.5-14.5V running)
  2. Load test battery
  3. Test alternator output
  4. Inspect belt tension
  5. Clean battery terminals
  6. Check ground straps

Repair notes

Test battery and alternator. Clean terminals. Most common: failing alternator.

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