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Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1791 (Engine Controls - Diagnostic Subroutines -- Diesel 6.0L (99P E-Series & 99P F450/550)) >> Diagnostic Trouble Code (DTC) Charts and Descriptions >> P0231 - Fuel Pump Secondary Circuit Low

P0231 - Fuel Pump Secondary Circuit Low

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P0231 - FUEL PUMP SECONDARY CIRCUIT LOW

Description:  The powertrain control module (PCM) monitors the fuel pump monitor (FPM) circuit. The test fails if the PCM commands the fuel pump ON and B+ voltage is not detected on the FPM circuit.
Possible Causes: 
  • Inertia switch
  • Fuel pump relay
  • Open or short circuit
Diagnostic Aids:  During the key on engine off (KOEO) self-test, the PCM commands the fuel pump ON so this test can be carried out.
Application    Key On Engine Off  Key On Engine Running  Continuous Memory 
All   refer to PINPOINT TEST M .
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