P1246 – Alternator Load Signal (Nissan)

Description

The ECM detected an abnormal alternator load signal.

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Symptoms

  • Battery warning light
  • Dimming lights
  • Charging issues

Causes

  • Faulty alternator
  • Wiring issues
  • ECM signal fault

Diagnosis

  • Check alternator output
  • Inspect wiring
  • Scan live data

Repair

  • Replace alternator
  • Repair wiring