LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2014 >> GS 450h >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (Diagnostic Codes (P0171-P062F)) >> SFI System >> DTC P0192, P0193: Fuel Rail Pressure Sensor Circuit Low Input; Fuel Rail Pressure Sensor Circuit High Input [09/2013 - ] >> Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC P0192, P0193: Fuel Rail Pressure Sensor Circuit Low Input; Fuel Rail Pressure Sensor Circuit High Input [09/2013 - ]: Procedure

  1. READ VALUE USING TECHSTREAM (FUEL PRESSURE) 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Turn the Techstream on.
    4. Put the engine in inspection mode (maintenance mode). Refer to INSPECTION MODE PROCEDURE [09/2013 - ] .
    5. Start the engine.
    6. Enter the following menus: Powertrain / Engine and ECT and ECT / Data List / Fuel Press.
    7. Read the values.

      OK

      1800 to 2800 kPa (18.4 to 28.6 kgf/cm2 , 261 to 406 psi)

      Result

      Fuel Pressure (kPa) Proceed to
      25000 or more A
      0 A
      (1800 to 2800)* B

      HINT: 

      *: The value must change when the engine is moving or stationary.

    B → See step   5 

    A: Go to next step 

  2. CHECK HARNESS AND CONNECTOR (ECM - FUEL PRESSURE SENSOR) 
    1. Disconnect the ECM connectors.
    2. Disconnect the fuel pressure sensor connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      F5-88 (VCPR) - F45-1 (VC) Always Below 1 Ω
      F5-86 (PR) - F45-3 (PR) Always Below 1 Ω
      F5-85 (EPR) - F45-2 (E2) Always Below 1 Ω
      F5-88 (VCPR) or F45-1 (VC) - body ground Always 10 kΩ or higher
      F5-86 (PR) or F45-3 (PR) - Body ground Always 10 kΩ or higher
    4. Reconnect the ECM connectors.
    5. Reconnect the fuel pressure sensor connector.

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (ECM - FUEL PRESSURE SENSOR) 

    OK: Go to next step 

  3. INSPECT FUEL PRESSURE SENSOR (VC VOLTAGE) 
    1. Disconnect the fuel pressure sensor connector.
      GTY467059Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Turn the power switch on (IG).
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      F45-1 (VC) - F45-2 (E2) Power switch on (IG) 4.5 to 5.5 V
      TEXT IN ILLUSTRATION

      *a Front view of wire harness connector
      (to Fuel Pressure Sensor)
    4. Reconnect the fuel pressure sensor connector.

    NG → See step   6 

    OK: Go to next step 

  4. INSPECT FUEL PRESSURE SENSOR 
    1. Inspect the fuel pressure sensor. Refer to INSPECTION [09/2013 - ] .

    NG → See step   7 

    OK → See step   6 

  5. CHECK FOR INTERMITTENT PROBLEMS. Refer to  CHECK FOR INTERMITTENT PROBLEMS [09/2013 - ] 
  6. REPLACE ECM. Refer to  REMOVAL [09/2013 - ] 
  7. REPLACE FUEL PRESSURE SENSOR. Refer to  REMOVAL [09/2013 - ] 
scientia non olet · About LEMON Manuals