P1388 – Crankshaft Position Sensor Slow Response (Nissan)

Description

The ECM detected a slow response from the crankshaft position sensor.

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Symptoms

  • Hard start
  • Stalling

Causes

  • Sensor degradation
  • Wiring issue
  • ECM logic fault

Diagnosis

  • Check sensor resistance
  • Inspect wiring
  • Scan crank signal

Repair

  • Replace sensor
  • Repair wiring

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