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Home >> Lexus >> 2010 >> GS 350 AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 168 (Engine Control System (DTCS P0420 - U0101 & Circuit Tests)) >> SFI System >> 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

Confirmation Driving Pattern

WARNING: This page is about a different car, the 2009 Lexus IS 250. However, it is still accessible from the selected car via links, so may be relevant.

HINT: 

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

Fig 1: Confirmation Driving Pattern
GTY123160Courtesy 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 DTCs (where set).
  5. Select the following menu items: Powertrain / Engine and ECT / Monitor / O2 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 and ECT / Monitor / O2 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. Refer to READINESS MONITOR DRIVE PATTERN .

    HINT: 

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

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