P1548 – Throttle Motor Power Supply Intermittent (Nissan)

Description

The ECM detected intermittent power supply to the throttle control motor.

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Symptoms

  • Hesitation
  • Unstable idle

Causes

  • Loose connector
  • Wiring issue
  • Relay fault

Diagnosis

  • Check connectors
  • Inspect wiring
  • Test relay

Repair

  • Repair wiring
  • Replace relay