P1546 – Throttle Control Motor Relay Open (Nissan)

Description

The ECM detected an open circuit in the throttle control motor relay.

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Symptoms

  • Poor acceleration
  • Limp mode

Causes

  • Relay failure
  • Broken wiring
  • Connector issue

Diagnosis

  • Test relay
  • Inspect wiring
  • Check connectors

Repair

  • Replace relay
  • Repair wiring