Detection Condition

• DTC P0230 indicates excessive current draw is detected (FP output command ON) on the FP circuit or voltage is not detected (FP output command OFF) on the FP circuit (PCM expects to detect VPWR voltage coming through fuel pump relay coil to FP circuit).
• DTC P0231 indicates PCM did not detect B+ voltage on Fuel Pump Monitor (FPM) circuit when fuel pump was commanded ON.
• DTC P0232 indicates PCM detected FPM circuit voltage was high when fuel pump was commanded OFF.

The Fuel Pump Driver Module (FPDM) modulates voltage to FP to achieve proper fuel pressure. Voltage for fuel pump is supplied by the power relay or FPDM power supply relay.