P2631 – Fuel Pump Control Circuit Low

Description

The ECM detects a low signal in the fuel pump control circuit.

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Symptoms

  • Hard starting
  • Engine hesitation
  • Check engine light

Causes

  • Weak pump
  • Wiring short to ground
  • ECM issue

Diagnosis

  • Test pump
  • Inspect wiring
  • Check ECM

Repair

  • Replace pump
  • Repair wiring