OBDII Code List

P1231 MERCURY - High Speed Fuel Pump Relay Activated

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3   
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Possible causes

  • Faulty High Speed Fuel Pump
  • High Speed Fuel Pump harness is open or shorted
  • High Speed Fuel Pump circuit poor electrical connection

Possible symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P1231 Mercury Description

The Engine Control Module (ECM) energized the high speed fuel pump and detected no current flow on the circuit.
OBDII Code P1231 Mercury - High Speed Fuel Pump Relay Activated -

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Related Information

P1231 MERCURY Comments

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