Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2006 Toyota Sienna AWD V6-3.3L (3MZ-FE)FACTORY OEM SERVICE PROCEDURE
O2S Test Result
O2S TEST RESULT
The purpose of the O2S test result (mode 05) is to allow access to the results for on-board diagnostic monitoring tests of the heated oxygen sensor.
The O2S test result (mode 05) allows the OBD II scan tool to display the test values, minimum test limit and maximum test limit of the O2S. The test values are displayed after the vehicle has driven to run the O2S monitor.
When the test value is not between the minimum test limit and maximum test limit, the ECM (PCM) interprets this as a malfunction. When the O2S is not malfunction, if the difference of the test value and test limit is very small, the O2S will malfunction in near future.
Perform the following instruction to view the O2S status. Although this instruction references the Lexus/Toyota diagnostic tester, it can be checked using a generic OBD II scan tool. Refer to your scan tool operator's manual for specific procedures.
NOTE: The A/F sensor test result is unable to be viewed using the O2S test result. Refer to the Checking Monitor Status to view the A/F sensor test result.
1. PERFORM MONITOR DRIVE PATTERN
a. Connect the intelligent tester to the DLC3.
b. Turn the ignition switch and the tester ON.
c. Clear the DTCs.
d. Run the vehicle in accordance with the drive pattern. Do not turn the ignition switch OFF.
NOTE: The test results will be lost if the ignition switch is turned OFF.
2. ACCESS O2S TEST RESULT
a. Select from the intelligent tester menus: DIAGNOSIS, CARB OBD II and O2S TEST RESULTS
b. Select the desired O2S and press ENTER.
c. Select a test data and press the asterisk and HELP simultaneously to view the test value description.
NOTE: On the vehicle equipped with an A/F sensor, the tester displays "No parameter to display" if "Bank 1-Sensor 1" or Bank 2-Sensor 1" is selected.
3. CHECK O2S STATUS
Check that the Cur Val is between Min Val and Max Val.
- Min Val: Minimum test limit
- Max Val: Maximum test limit
- Cur Val: Test value
4. O2S TEST RESULT INFORMATION
If you use a generic scan tool, multiply the test value by the scaling value listed.
The purpose of the O2S test result (mode 05) is to allow access to the results for on-board diagnostic monitoring tests of the heated oxygen sensor.
The O2S test result (mode 05) allows the OBD II scan tool to display the test values, minimum test limit and maximum test limit of the O2S. The test values are displayed after the vehicle has driven to run the O2S monitor.
When the test value is not between the minimum test limit and maximum test limit, the ECM (PCM) interprets this as a malfunction. When the O2S is not malfunction, if the difference of the test value and test limit is very small, the O2S will malfunction in near future.
Perform the following instruction to view the O2S status. Although this instruction references the Lexus/Toyota diagnostic tester, it can be checked using a generic OBD II scan tool. Refer to your scan tool operator's manual for specific procedures.
NOTE: The A/F sensor test result is unable to be viewed using the O2S test result. Refer to the Checking Monitor Status to view the A/F sensor test result.
1. PERFORM MONITOR DRIVE PATTERN
a. Connect the intelligent tester to the DLC3.
b. Turn the ignition switch and the tester ON.
c. Clear the DTCs.
d. Run the vehicle in accordance with the drive pattern. Do not turn the ignition switch OFF.
NOTE: The test results will be lost if the ignition switch is turned OFF.
2. ACCESS O2S TEST RESULT
a. Select from the intelligent tester menus: DIAGNOSIS, CARB OBD II and O2S TEST RESULTS
b. Select the desired O2S and press ENTER.
c. Select a test data and press the asterisk and HELP simultaneously to view the test value description.
NOTE: On the vehicle equipped with an A/F sensor, the tester displays "No parameter to display" if "Bank 1-Sensor 1" or Bank 2-Sensor 1" is selected.
3. CHECK O2S STATUS
Check that the Cur Val is between Min Val and Max Val.
- Min Val: Minimum test limit
- Max Val: Maximum test limit
- Cur Val: Test value
4. O2S TEST RESULT INFORMATION
If you use a generic scan tool, multiply the test value by the scaling value listed.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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