P1200 – Fuel Pump Control Circuit (Nissan)

Description

The ECM detected a malfunction in the fuel pump control circuit.

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Symptoms

  • No start
  • Long crank
  • Stalling
  • Low power

Causes

  • Faulty fuel pump relay
  • Open/short wiring
  • ECM driver fault
  • Weak fuel pump

Diagnosis

  • Check wiring
  • Test relay
  • Measure pump voltage
  • Scan live data

Repair

  • Replace relay
  • Repair wiring
  • Replace fuel pump