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Home >> Lexus >> 2016 >> GX 460 Luxury >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (Diagnostic Codes) (2 Of 7) >> SFI System >> DTC P0171: System Too Lean (Bank 1); DTC P0172: System Too Rich (Bank 1); DTC P0174: System Too Lean (Bank 2); DTC P0175: System Too Rich (Bank 2) [08/2015 - 08/2022] >> Confirmation Driving Pattern
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Confirmation Driving Pattern

Fig 1: Confirmation Driving Pattern
GTY285273Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  1. Connect the Techstream to the DLC3.
  2. Turn the engine switch on (IG) and turn the Techstream on.
  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC operation).
  4. Turn the engine switch off and wait for at least 30 seconds.
  5. Turn the engine switch on (IG) and turn the Techstream on [A].
  6. Start the engine and warm it up until the engine coolant temperature is 75°C (167°F) or higher with all the accessories switched off [B].
  7. With the engine warmed up, idle the engine for 2 minutes or more [C].
  8. Drive the vehicle at a speed between 60 and 135 km/h (38 and 85 mph) for 5 minutes or more [D].
    WARNING:

    When performing the confirmation driving pattern, obey all speed limits and traffic laws.

  9. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes [E].
  10. Read the pending DTCs.

    HINT: 

    If a pending DTC is output, the system is malfunctioning.

  11. If no pending DTC is output, perform a universal trip and check for permanent DTCs (Refer to DTC CHECK / CLEAR [08/2015 - ] ).

    HINT: 

    • If a permanent DTC is output, the system is malfunctioning.
    • If no permanent DTC is output, the system is normal.