DTC P0232: Fuel Pump Secondary Circuit High

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.

P0232 - FUEL PUMP SECONDARY CIRCUIT HIGH

Description:	The powertrain control module (PCM) monitors the fuel pump monitor (FPM) circuit. This test fails when the PCM detects voltage on the FPM circuit while the fuel pump is commanded off. The FPM circuit is wired to a pull-up voltage inside the PCM. The FPM circuit goes high if, with the key on and the fuel pump commanded off, the FPM/FP PWR circuit loses its path to ground through the fuel pump. The FPM circuit also goes high if the FPM/FP PWR circuit is shorted to voltage.
Possible Causes:	Inertia fuel shutoff (IFS) switch not reset or electrically open Open circuit between the fuel pump and the FPM connection to the FP PWR circuit Poor fuel pump ground Fuel pump electrically open Fuel pump secondary circuits short to voltage Fuel pump relay contacts always closed Open FPM circuit between the PCM and the connection to the FP PWR circuit Damaged low speed fuel pump relay or concern with related circuits (if equipped)
Diagnostic Aids:	Continuous memory P0232 can be set if the IFS switch is tripped then reset, or if the fuel pump circuit is activated when the PCM expected the circuit to be off (fuel system test or prime procedure).
Application	Key On Engine Off	Key On Engine Running	Continuous Memory
Excursion	GO to KA: Fuel Pump (FP) Relay STEP KA40.	GO to KA: Fuel Pump (FP) Relay STEP KA40.	GO to KA: Fuel Pump (FP) Relay STEP KA62.
All others	GO to KA: Fuel Pump (FP) Relay STEP KA10.	GO to KA: Fuel Pump (FP) Relay STEP KA10.	GO to KA: Fuel Pump (FP) Relay STEP KA27.