P1501 – Starter Signal Circuit Fault (Nissan)

Description

The ECM detected a malfunction in the starter signal circuit.

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Symptoms

  • No crank
  • Hard start

Causes

  • Open circuit
  • Ignition switch fault
  • Wiring issue

Diagnosis

  • Check starter signal
  • Inspect ignition switch
  • Test wiring

Repair

  • Repair wiring
  • Replace switch