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Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 765 (Engine Controls - Powertrain DTC Charts & Description (Except Diesel & Hybrid)) >> Diagnostic Trouble Code (DTC) Charts And Descriptions >> DTC P0231: Fuel Pump Secondary Circuit Low

DTC P0231: Fuel Pump Secondary Circuit Low

WARNING: This page does not describe the selected car, but rather 32 other vehicles, including the 2005 Mercury Sable, 2005 Mercury Mountaineer, 2005 Mercury Monterey, 2005 Mercury Montego, and 2005 Mercury Mariner. However, it is still accessible from the selected car via links, so may be relevant.
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: 
  • Open B+ circuit to the fuel pump relay
  • Open FP PWR circuit between the fuel pump relay and its connection to the FPM circuit
  • Damaged fuel pump relay
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 
Excursion GO to KA: Fuel Pump (FP) Relay STEP KA56. GO to KA: Fuel Pump (FP) Relay STEP KA56. GO to KA: Fuel Pump (FP) Relay STEP KA61.
All others GO to KA: Fuel Pump (FP) Relay STEP KA22. GO to KA: Fuel Pump (FP) Relay STEP KA22. GO to KA: Fuel Pump (FP) Relay STEP KA29.
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