P0192

DTC P0192 Fuel Rail Pressure (FRP) Sensor Circuit Low Voltage

Circuit Description

The fuel rail pressure (FRP) sensor is installed to the fuel rail and it detects the fuel pressure in the fuel rail converts the pressure into a voltage signal and sends the signal to the ECM. The sensor has the following circuits.

^ 5 volts reference circuit
^ Low reference circuit
^ FRP sensor signal circuit

The ECM monitors the FRP sensor signal voltage. Higher fuel rail pressure provides higher signal voltage while lower pressure provides lower signal voltage. The ECM calculates actual fuel rail pressure (fuel pressure) from the voltage signal and uses the result in fuel injection control and other control tasks. If the ECM detects an excessively low signal voltage this DTC will set.

Condition for Running the DTC

^ DTCs P0193 P0642 and P0643 are not set.
^ The battery voltage is between 10 to 16 volts.
^ The ignition switch is ON.

Condition for Setting the DTC

^ The ECM detects that the FRP sensor signal voltage is less than 0.7 volts.

Action Taken When the DTC Sets

^ The ECM illuminates MIL when the diagnostic runs and fails. Refer to DTC Type Definitions for Action Taken When the DTC Sets - Type A.
^ The ECM limits fuel injection quantity.
^ The ECM inhibits EGR control.
^ The ECM inhibits DPF regeneration control.
^ The ECM inhibits cruise control.
^ The ECM inhibits PTO control.

Condition for Clearing the DTC

^ Refer to DTC Type Definitions for Condition for Clearing the MI/DTC - Type A.

Diagnostic Aids

^ If an intermittent condition is suspected refer to Intermittent Conditions in this section. Electromagnetic interference may affect intermittent condition.

Circuit/System Testing DTC P0192