P1371 – Ignition Coil Primary Circuit High Voltage (Nissan)

Description

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

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Symptoms

  • Misfire
  • Hard start

Causes

  • Short to power
  • Coil failure
  • ECM driver issue

Diagnosis

  • Check wiring for shorts
  • Inspect coil
  • Scan ignition data

Repair

  • Repair wiring
  • Replace coil