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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.
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HOMESERVICE MANUALSTOYOTA2004TUNDRA 4WD V8-4.7L (2UZ-FE)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTESTING AND INSPECTIONMODE 6 DATAO2S TEST RESULT
2004 Toyota Tundra 4WD V8-4.7L (2UZ-FE)
O2S Test Result
2004 Toyota Tundra 4WD V8-4.7L (2UZ-FE)SECTION O2S Test Result
O2S TEST RESULT
INTRODUCTION
The O2S TEST RESULT refers to the results of the engine control module (ECM) when it monitors the oxygen sensor (O2S), and it can be read using the hand-held tester or the generic OBD II scan tool. Based on this, you can find the O2S's conditions. The ECM monitors the O2S in the various items. You can read the monitor result (TEST DATA) of each monitor item using the O2S TEST RESULT. However, the output value of the TEST DATA is the latest "snapshot" value that is it taken after monitoring and therefore it is not dynamic.
The description of the O2S TEST RESULT (for O2S related DTCs) are written in a table.
This table consists of 5 items:
1. TEST ID (a code applied to each TEST DATA)
2. Description of TEST DATA
3. Conversion Factor (When Conversion Factor has a value written in the table, multiply the TEST DATA value appearing on the scan tool by the Conversion Factor value. The result will be the required value.)
4. Unit
5. Standard Value
If the TEST DATA value appearing on the scan tool is out of the standard value, the O2S is malfunctioning. If it is within the standard value, the O2S is functioning normally. However, if the value is on the borderline of the standard value, the O2S may malfunction very soon.
How to read O2S test result using hand-held tester
a. Connect the hand-held tester to the DLC3.
b. On the tester screen, select the following menus: DIAGNOSIS / CARB OBD II / O2S TEST RESULT. A list of the O2S equipped on the vehicle will be displayed.
c. Select the desired O2S and press ENTER. The following screen will appear.
d. Press HELP and "?" simultaneously. More information will appear.
e. Example:
1. The hand-held tester displays "17" as a value of the "TIME $81" (see the illustration).
2. Find the Conversion Factor value of "TIME $81"in the O2S TEST RESULT chart. 0.3906 is specified for $81 in this chart.
3. Multiply "17" in step (1) by 0.3906 (Conversion Factor) in the step (2).
17 x 0.3906 = 6.6
4. If the answer is within the standard value, the "TIME $81" can be confirmed to be normal.
INTRODUCTION
The O2S TEST RESULT refers to the results of the engine control module (ECM) when it monitors the oxygen sensor (O2S), and it can be read using the hand-held tester or the generic OBD II scan tool. Based on this, you can find the O2S's conditions. The ECM monitors the O2S in the various items. You can read the monitor result (TEST DATA) of each monitor item using the O2S TEST RESULT. However, the output value of the TEST DATA is the latest "snapshot" value that is it taken after monitoring and therefore it is not dynamic.
The description of the O2S TEST RESULT (for O2S related DTCs) are written in a table.
This table consists of 5 items:
1. TEST ID (a code applied to each TEST DATA)
2. Description of TEST DATA
3. Conversion Factor (When Conversion Factor has a value written in the table, multiply the TEST DATA value appearing on the scan tool by the Conversion Factor value. The result will be the required value.)
4. Unit
5. Standard Value
If the TEST DATA value appearing on the scan tool is out of the standard value, the O2S is malfunctioning. If it is within the standard value, the O2S is functioning normally. However, if the value is on the borderline of the standard value, the O2S may malfunction very soon.
How to read O2S test result using hand-held tester
a. Connect the hand-held tester to the DLC3.
b. On the tester screen, select the following menus: DIAGNOSIS / CARB OBD II / O2S TEST RESULT. A list of the O2S equipped on the vehicle will be displayed.
c. Select the desired O2S and press ENTER. The following screen will appear.
d. Press HELP and "?" simultaneously. More information will appear.
e. Example:
1. The hand-held tester displays "17" as a value of the "TIME $81" (see the illustration).
O2S Test Result Chart:
2. Find the Conversion Factor value of "TIME $81"in the O2S TEST RESULT chart. 0.3906 is specified for $81 in this chart.
3. Multiply "17" in step (1) by 0.3906 (Conversion Factor) in the step (2).
17 x 0.3906 = 6.6
4. If the answer is within the standard value, the "TIME $81" can be confirmed to be normal.
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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.