P0190: Fuel Rail Pressure (FRP) Sensor Circuit Malfunction

WARNING: This page does not describe the selected car, but rather 30 other vehicles, including the 2004 Mercury Sable, 2004 Mercury Mountaineer, 2004 Mercury Monterey, 2004 Mercury Marauder, and 2004 Mercury Grand Marquis. However, it is still accessible from the selected car via links, so may be relevant.

P0190 - FUEL RAIL PRESSURE (FRP) SENSOR CIRCUIT MALFUNCTION

Description:	The comprehensive component monitor (CCM) monitors the FRP sensor to the PCM for VREF voltage. The test fails when the VREF voltage from the PCM drops to a voltage less than a minimum calibrated value.
Possible Causes:	VREF open in harness. VREF open in sensor. VREF open in PCM.
Diagnostic Aids:	Verify a VREF voltage between 4 and 6 volts.
Application	Key On Engine Off	Key On Engine Running	Continuous Memory
Fuel Rail Pressure Temperature (FRPT) Sensor	-	-	GO to PINPOINT TEST DD: FUEL RAIL PRESSURE (FRP), FUEL RAIL TEMPERATURE (FRT) AND FUEL RAIL PRESSURE TEMPERATURE (FRPT) SENSORS Step 59.
Fuel Rail Pressure (FRP) Sensor ONLY	GO to PINPOINT TEST DD: FUEL RAIL PRESSURE (FRP), FUEL RAIL TEMPERATURE (FRT) AND FUEL RAIL PRESSURE TEMPERATURE (FRPT) SENSORS Step 12.	GO to PINPOINT TEST DD: FUEL RAIL PRESSURE (FRP), FUEL RAIL TEMPERATURE (FRT) AND FUEL RAIL PRESSURE TEMPERATURE (FRPT) SENSORS Step 12.	GO to PINPOINT TEST DD: FUEL RAIL PRESSURE (FRP), FUEL RAIL TEMPERATURE (FRT) AND FUEL RAIL PRESSURE TEMPERATURE (FRPT) SENSORS Step 12.
Fuel Rail Pressure AND Fuel Rail Temperature (FRT) Sensors	GO to PINPOINT TEST DD: FUEL RAIL PRESSURE (FRP), FUEL RAIL TEMPERATURE (FRT) AND FUEL RAIL PRESSURE TEMPERATURE (FRPT) SENSORS Step 12.	GO to PINPOINT TEST DD: FUEL RAIL PRESSURE (FRP), FUEL RAIL TEMPERATURE (FRT) AND FUEL RAIL PRESSURE TEMPERATURE (FRPT) SENSORS Step 12.	GO to PINPOINT TEST DD: FUEL RAIL PRESSURE (FRP), FUEL RAIL TEMPERATURE (FRT) AND FUEL RAIL PRESSURE TEMPERATURE (FRPT) SENSORS Step 12.