DTC P0192: Fuel Rail Pressure Sensor Circuit Low Bank 1: Notes

1. - 

DTC detecting condition: 

Immediately at fault recognition

Trouble symptom: 

• Improper idling
• Poor driving performance

Wiring diagram: 

Engine Electrical System Ref. to WIRING SYSTEM>ENGINE ELECTRICAL SYSTEM

Courtesy of SUBARU OF AMERICA, INC.

1. CHECK DTC  .
   1. Turn the ignition switch to ON.
   2. Using the Subaru Select Monitor or a general scan tool, read the DTC of [Engine]. Ref. to COMMON (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC)

   Is DTC P06B4 displayed? (Current code)

   Yes  : Check for DTC P06B4. Ref. to ENGINE (DIAGNOSTICS) (H4DOTC)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC P06B4 SENSOR POWER SUPPLY "B" CIRCUIT LOW 

   No  : Go to  2.

2. CHECK DTC  .

   Using the Subaru Select Monitor or a general scan tool, read the DTC of [Engine]. Ref. to COMMON (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC)

   Is DTC P06B5 displayed? (Current code)

   Yes  : Check for DTC P06B5. Ref. to ENGINE (DIAGNOSTICS) (H4DOTC)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC P06B5 SENSOR POWER SUPPLY "B" CIRCUIT HIGH 

   No  : Go to  3.

3. CHECK DATA MONITOR  .
   1. Turn the ignition switch to ON.
   2. Using the Subaru Select Monitor or a general scan tool, perform the clear memory of [Engine]. Ref. to COMMON (DIAGNOSTICS)>CLEAR MEMORY
   3. Turn the ignition switch to OFF.
   4. Start the engine.
   5. Using the Subaru Select Monitor, read the value in [Fuel Rail Pressure A].
      NOTE:

      For detailed operation procedures, refer to "COMMON (DIAGNOSTICS)". Ref. to  COMMON (DIAGNOSTICS)>DATA MONITOR 

   Is the value of [Fuel Rail Pressure A] approx. 0 [kPa] (0 psi)?

   Yes  : Go to  4.

   No  : Refer to "Check non-permanent occurrence malfunctions". Ref. to ENGINE (DIAGNOSTICS) (H4DOTC)>GENERAL DESCRIPTION>INSPECTION>CHECK NON-PERMANENT OCCURRENCE MALFUNCTIONS

4. CHECK HARNESS BETWEEN ECM AND FUEL PRESSURE SENSOR CONNECTOR (SHORT TO GROUND)  .
   1. Turn the ignition switch to OFF.
   2. Disconnect the connector from ECM.
   3. Disconnect the connector from the fuel pressure sensor.
   4. Measure the resistance between the ECM connector and engine ground.

      Connector & terminal 

      (E51) No. 22 - Engine ground:

   Is the resistance 1 MΩ or more?

   Yes  : Replace the fuel pressure sensor. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DOTC)>FUEL PRESSURE SENSOR

   No  : Repair the ground short circuit of harness between ECM connector and fuel pressure sensor connector.