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2022 VOLVO XC40
2.0L I4 Turbo•AWD•AUTOMATIC•gas•B4204T27•turbo
3 active safety recalls on this vehicle — view recalls
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Repairs0Labor957Torque6655Fluid15DTC3668Battery2Maintenance0Recalls3
P0621low severityPowertrain

Generator Lamp "L" Control Circuit

on 2022 Volvo XC40 2.0L I4 Turbo · AWD

What this code means

The PCM detected a fault in the generator lamp (L terminal) control circuit. The charge warning indicator may not operate correctly.

Symptoms

  • Charge light stays on or off
  • Charging issues
  • Warning lamp malfunction

Common causes

  • Faulty generator L terminal circuit
  • Wiring open or short
  • Corroded connector
  • Faulty alternator

Diagnostic steps

  1. Check L terminal circuit continuity
  2. Inspect connectors for corrosion
  3. Test alternator output
  4. Repair circuit or replace alternator
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