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Home >> Lexus >> 2008 >> GS 350 AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTC P050A - P2A03, DTC U0101 >> 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 Graph
G05285246Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  1. Connect the Techstream to the DLC3.
  2. Turn the engine switch on (IG).
  3. Turn the Techstream on.
  4. Clear the DTCs (if set).
  5. Select the following menu items: Powertrain/Engine and ECT/Monitor/O2 Sensor/Details.
  6. Check that RES RATE B1 S1 and B2 S1 are Fail.
  7. Start the engine and warm it up. (Proceed "A")
  8. Drive the vehicle at a constant speed of between 25 mph and 75 mph (40 km/h and 120 km/h) for 3 minutes. (Proceed "B")
  9. Check the monitor result values on the Techstream by selecting the following menu items: Powertrain/Engine and ECT/Monitor/O2 Sensor/Details/RES RATE B1 S1/Details.
  10. If the values indicated on the Techstream do not change, perform READINESS MONITOR DRIVE PATTERN for the A/F sensor and the heated oxygen sensor (See INSPECTION PROCEDURE  ).

    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 and ECT/Trouble Codes.
  13. Check if any DTCs (any pending DTCs) are set.
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