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Home >> Lexus >> 2008 >> ES 350 >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System - Diagnostic Codes (4 Of 4) >> DTC P2A00 A/F Sensor Circuit Slow Response (Bank 1 Sensor 1); DTC P2A03 A/F Sensor Circuit Slow Response (Bank 2 Sensor 1) >> Confirmation Driving Pattern
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Confirmation Driving Pattern

HINT:

Performing this confirmation pattern will activate the A/F sensor response monitor.

Fig 1: Vehicle Speed Driving Pattern
G05247806Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  1. Connect Techstream to the DLC3.
  2. Turn the engine switch on (IG).
  3. Turn the tester on.
  4. Clear the DTCs (where set).
  5. Select the following menu items: Powertrain / Engine / Monitor / 02 Sensor / Details.
  6. Check that RES RATE B1S1 is Fail.
  7. Start the engine and warm it up (Procedure "A").
  8. Drive the vehicle at between 25 mph and 75 mph (40 km/h and 120 km/h) for 3 minutes. However, the vehicle should be driven at a constant speed (Procedure "B").
  9. Check the monitor result values on Techstream by selecting the following menu items: Powertrain / Engine / Monitor / 02 Sensor / Details / RES RATE B1 S1 and RES RATE B2 S1.
  10. If the values indicated on the tester do not change, perform READINESS MONITOR DRIVE PATTERN for the A/F sensor and the heated oxygen sensor (See WIRING DIAGRAM  ).

    HINT:

    Completion of all A/F sensor monitors is required to change the value in TEST RESULT.

  11. Note the value of the Monitor Result.
  12. Select the following menu items: Powertrain / Engine / Trouble Code / Pending.
  13. Check if any DTCs (any pending DTCs) are set.
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