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Home >> Lexus >> 2006 >> GX 470 >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Control System - DTC P0657 - P2A03 >> DTC P2A00, P2A03: A/F Sensor Circuit Slow Response (Bank 1 Sensor 1); 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 air fuel ratio (A/F) sensor response monitor.

Fig 1: Identifying Confirmation Driving Pattern Of Vehicle Speed & Time
G04968116Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
  1. Connect the intelligent tester to the DLC3 with CAN VIM [A].
  2. Turn the ignition switch ON [B].
  3. Turn the tester ON [C].
  4. Clear DTCs (if set) (See DTC CHECK/CLEAR ) [D].
  5. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / MONITOR INFO / MONITOR RESULT [E].
  6. Check that RES RATE B1 S1 is INCOMPL [F].
  7. Start the engine and warm it up [G].
  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 [H].
  9. Check the monitor result values on the intelligent tester by entering the following menus: DIAGNOSIS / ENHANCED OBD II / MONITOR INFO / TEST RESULT [I].
  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 [J].

    HINT:

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

  11. Note the value of the Monitor Result [K].
  12. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / DTC INO / PENDING CODES [L].
  13. Check if any pending DTCs are set [M].
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