P0190 - Fuel Rail Pressure Sensor Circuit Malfunction (FRP) 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.
VREF open in harness.
VREF open in sensor.
VREF open in PCM.
Verify VREF voltage between 4.0 and 6.0V.
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