LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2008 >> ES 350 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Diagnostic Codes (3 Of 4) >> DTC P0607 Control Module Performance >> Inspection Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Inspection Procedure

  1. CHECK FOR EXHAUST GAS LEAK 
    1. Allow the engine to idle.
    2. Check for exhaust gas leak around the HO2 sensor.

      OK: 

      No leak from the HO2 sensor. 

    NG: REPAIR OR REPLACE EXHAUST GAS LEAK POINT 

    OK: Go to next step 

  2. INSPECT HEATED OXYGEN SENSOR 
    Fig 1: Fuel Trim And Rear Heated Oxygen Sensor Voltage Cross Reference Pattern
    G05386759Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Connect Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Turn the tester on.
    4. Start the engine and warm it up.
    5. Allow the engine to idle.
    6. Select the following menu items: Powertrain / Engine / Active Test / Control the Injection Volume for A/F Sensor.
    7. Check the O2S B1S2 (O2S B2S2) values when the Control the Injection Volume for A/F Sensor is -12.5% (Lean fuel-trim).
    8. Check the O2S B1S2 (O2S B2S2) values when the Control the Injection Volume for A/F Sensor is 25% (Rich fuel-trim).

      Standard Voltage 

      INJECTION VOLUME SPECIFICATION

      Control the Injection Volume for A/F Sensor O2S B1S2 (O2S B2S2)
      -12.5% Less than 0.2 V
      25% More than 0.8 V

    NG: REPLACE HEATED OXYGEN SENSOR  (See REMOVAL )

    OK: Go to next step 

  3. CHECK WHETHER DTC OUTPUT RECURS (DTC P0607) 
    1. Connect Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Turn the tester on.
    4. Clear DTC (See DTC CHECK/CLEAR ).
    5. Turn the engine switch off and turn the tester off.
    6. Disconnect the tester.
    7. Disconnect the cable from the battery negative (-) terminal and wait for 1 minute.
    8. Connect the cable to the battery negative (-) terminal.
    9. Connect the tester to the DLC3.
    10. Turn the engine switch on (IG).
    11. Turn the tester on.
    12. Start the engine.
      Fig 2: Engine Coolant Temperature Driving Pattern
      G05386760Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    13. Perform the drive pattern.
      1. Warm up the engine.
      2. Accelerate the vehicle until 80 km/h (50 mph) and stop the vehicle.
      3. Drive the vehicle by 60 to 80 km/h (35 to 50 mph) for 5 minutes or more.
    14. Select the following menu items: Powertrain / Engine / Trouble Codes.
    15. Read DTCs.

      Result 

      RESULT CHART

      Result Proceed to
      No output A
      P0607 B

    B: REPLACE ECM (See  REMOVAL  ) 

    A: CHECK FOR INTERMITTENT PROBLEMS (See  CHECK FOR INTERMITTENT PROBLEMS  ) 

scientia non olet · About LEMON Manuals