DTC P0193: Fuel Rail Pressure Sensor Circuit High Bank 1: Notes
DTC detecting condition:
Immediately at fault recognition
Trouble symptom:
- Improper idling
- Poor driving performanceCAUTION:
- After servicing or replacing faulty parts, perform Clear Memory Mode Refer to ENGINE (DIAGNOSTICS) (EXCEPT FOR STI)>CLEAR MEMORY MODE>OPERATION , and inspection mode Refer to ENGINE (DIAGNOSTICS) (EXCEPT FOR STI)>INSPECTION MODE>PROCEDURE ..
- Use the check board when measuring the ECM terminal voltage and resistance.
Wiring diagram:
Engine Electrical System Refer to WIRING SYSTEM>ENGINE ELECTRICAL SYSTEM>WIRING DIAGRAM .
- CHECK FOR POOR CONTACT.
Check for poor contact of ECM and fuel pressure sensor connector.
Is there poor contact of the ECM or fuel pressure sensor connector?
Yes: Repair the poor contact of the ECM or fuel pressure sensor connector.
No: Go to 2.
- CHECK HARNESS BETWEEN ECM AND FUEL PRESSURE SENSOR CONNECTOR.
- Turn the ignition switch to OFF.
- Disconnect the connector from ECM.
- Disconnect the connector from the fuel pressure sensor.
- Measure the resistance of harness between ECM connector and fuel pressure sensor connector.
Connector & terminal
(E159) No. 27 - (E162) No. 1:
(E158) No. 6 - (E162) No. 2:
Is the resistance less than 1 Ω?
Yes: Go to 3.
No: Repair the open circuit in harness between ECM connector and fuel pressure sensor connector.
- CHECK HARNESS BETWEEN ECM AND FUEL PRESSURE SENSOR CONNECTOR.
- Connect all connectors.
- Turn the ignition switch to ON.
- Measure the voltage between ECM connector and engine ground.
Connector & terminal
(E158) No. 6 (+) - Engine ground (-):
Is the voltage 5 V or more?
Yes: Repair the short circuit to power in the harness between ECM connector and fuel pressure sensor connector.
No: Replace the fuel pressure sensor. Refer to FUEL INJECTION (FUEL SYSTEMS) (EXCEPT FOR STI)>FUEL PRESSURE SENSOR .