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

DTC detecting condition:

Immediately at fault recognition

Trouble symptom:

Improper idling
Poor driving performance

CAUTION: Use the check board when measuring the ECM terminal voltage and resistance. Ref. to ENGINE (DIAGNOSTICS) (H4DO)>General Description>PREPARATION TOOL>HOW TO USE CHECK BOARD .

NOTE: After the faulty parts are repaired or replaced, perform the final check in Basic Diagnostic Procedure. Ref. to ENGINE (DIAGNOSTICS) (H4DO)>Basic Diagnostic Procedure>PROCEDURE .

Wiring diagram:

Engine Electrical System Ref. to WIRING SYSTEM (CROSSTREK MODEL)>Engine Electrical System>WIRING DIAGRAM .

Courtesy of SUBARU OF AMERICA, INC.

CHECK DATA MONITOR .
1. Using the Subaru Select Monitor or a general scan tool, perform the clear memory of [Engine]. Ref. to COMMON (diag)>CLEAR MEMORY .
  Clear Memory
2. Turn the ignition switch to OFF.
3. Start the engine.
4. Read [Fuel Rail Pressure A] on "data monitor" using the Subaru Select Monitor or general scan tool.
  Data Monitor
Is the value of [Fuel Rail Pressure A] approx. OMPa (0 mmHg, 0 inHg)?

Yes: Go to 2.

No: Check permanent non-occurrence of malfunction Ref. to ENGINE (DIAGNOSTICS) (H4DO)>General Description>INSPECTION>CHECK NON-PERMANENT OCCURRENCE MALFUNCTIONS .
CHECK HARNESS AND CONNECTOR BETWEEN ECM AND FUEL PRESSURE SENSOR (SHORT TO GROUND) .
1. Clear the memory. Ref. to COMMON (diag)>CLEAR MEMORY .
2. Disconnect the connector from ECM.
3. Disconnect the connector from the fuel pressure sensor.
4. Measure the resistance between ECM connector and chassis ground.
  Connector & terminal
  
  (E158) No. 56 - Chassis ground:
  
  (E162) No. 3 - Chassis ground:
Is the resistance 1 MΩ or more?

Yes: Replace the fuel pressure sensor. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DO)>FUEL PRESSURE SENSOR .

No: Repairing or replacing the wiring harness or connector