If it's P0190, Fuel Rail Pressure Sensor Circuit Malfunction:
The comprehensive component monitor (CCM) monitors the FPP 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. The voltage should be between 4.0v and 6.0v.
Possible causes are listed as:
VREF open in harness. VREF open in sensor, VREF open in PCM.
I guess I'd start by checking the connection to the harness at the sensor on the fuel rail. Have you made any modifications to the fuel system?
If it's P0190, Fuel Rail Pressure Sensor Circuit Malfunction:
The comprehensive component monitor (CCM) monitors the FPP 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. The voltage should be between 4.0v and 6.0v.
Possible causes are listed as:
VREF open in harness. VREF open in sensor, VREF open in PCM.
I guess I'd start by checking the connection to the harness at the sensor on the fuel rail. Have you made any modifications to the fuel system?