LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Toyota >> 2021 >> Prius LE AWD-e >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Diagnostic Codes (3 Of 8) >> SFI System >> DTC P0171-00: System Too Lean Bank 1; DTC P0172-00: System Too Rich Bank 1 [11/2015 - 12/2018] >> Confirmation Driving Pattern
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Confirmation Driving Pattern

GTY557863Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  1. Connect the Techstream to the DLC3.
  2. Turn the power switch on (IG).
  3. Turn the Techstream on.
  4. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  5. Turn the power switch off and wait for at least 30 seconds.
  6. Turn the power switch on (IG) [A].
  7. Turn the Techstream on.
  8. Put the engine in Inspection Mode (Maintenance Mode).

    Refer to INSPECTION MODE PROCEDURE [11/2015 - 12/2018]

  9. Start the engine and warm it up until the engine coolant temperature is 75°C (167°F) or higher with the A/C switch and all accessories off [B].
  10. With the engine warmed up, idle the engine for 5 minutes or more [C].
  11. With the engine running, drive the vehicle at a speed between 60 and 100 km/h (37 and 62 mph) for 5 minutes or more [D].
    WARNING:

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

    HINT: 

    If the engine stops, further depress the accelerator pedal to restart the engine.

  12. Enter the following menus: Powertrain / Engine / Trouble Codes [E].
  13. Read the pending DTCs.

    HINT: 

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

  14. If no pending DTCs are output, perform a universal trip and check for permanent DTCs.

    Refer to DTC CHECK / CLEAR [11/2015 - 07/2020]

    HINT: 

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