P1372 – Ignition Coil Secondary Circuit High Voltage (Nissan)

Description

The ECM detected an abnormally high voltage in the ignition coil secondary circuit.

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Symptoms

  • Misfire
  • Rough idle

Causes

  • Coil breakdown
  • High resistance
  • Wiring issue

Diagnosis

  • Check coil output
  • Inspect wiring
  • Scan misfire data

Repair

  • Replace coil
  • Repair wiring