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.
2010 Toyota 4Runner TrailFACTORY OEM SERVICE PROCEDURE
Heated Oxygen Sensor: Inspection: Inspection
- INSPECT HEATED OXYGEN SENSOR
- Measure the resistance according to the value(s) in the table below.
Standard Resistance (for Bank 1)
Tester Connection Condition Specified Condition 1 (HT1B) - 2 (+B) 20°C (68°F) 11 to 16 Ω 1 (HT1B) - 4 (E2) Always 10 kΩ or higher Standard Resistance (for Bank 2)
Tester Connection Condition Specified Condition 1 (HT2B) - 2 (+B) 20°C (68°F) 11 to 16 Ω 1 (HT2B) - 4 (E2) Always 10 kΩ or higher TEXT IN ILLUSTRATION*A for Bank 1 *B for Bank 2 *a Component without harness connected
(Heated Oxygen Sensor)If the result is not as specified, replace the heated oxygen sensor.
- Measure the resistance according to the value(s) in the table below.
Factory Service Tools
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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.