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Home >> Lexus >> 2008 >> IS 250 RWD, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 174 (Engine Control System - SFI System Diagnostics (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

Confirmation Driving Pattern

WARNING: This page is about a different car, the 2008 Lexus IS F. However, it is still accessible from the selected car via links, so may be relevant.

HINT

Performing this confirmation pattern will activate the air fuel ratio sensor response monitor

Fig 1: Vehicle Speed - Driving Pattern
G05751738Courtesy 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 DTCs (See DTC CHECK/CLEAR )
  5. Enter the following menus Powertrain / Engine / Monitor / O2 Sensor / Details
  6. Check that RES RATE B1S1 and RES RATE B2S1 are Incomplete
  7. Start the engine and warm it up
  8. Drive the vehicle at between 50 mph and 75 mph (80 km/h and 120 km/h) for 3 minutes However, the vehicle should be driven at a constant speed
  9. Check the monitor result values on the Techstream by entering the following menus Powertrain / Engine / Monitor/ O2 Sensor/ Details / RES RATE B1S1 or RES RATE B2S1 / Details.
  10. If the values indicated on the Techstream do not change, perform Readiness Monitor Drive Pattern for the air fuel ratio sensor and the heated oxygen sensor (See READINESS MONITOR DRIVE PATTERN )

    HINT.

    Completion of all air fuel ratio sensor monitors is required to change the value in RES RATE B1S1 and RES RATE B2S1

  11. Note the value of the RES RATE B1S1 and RES RATE B2S1
  12. Enter the following menus. Powertrain / Engine / Trouble Codes / Pending
  13. Check if any DTCs (any pending DTCs) are set
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