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.
2003 Nissan-Datsun Sentra SE-R, AutomaticFACTORY OEM SERVICE PROCEDURE
Oxygen Sensor
HO2S HEATER RESISTANCE
| Application | (1) Ohms @ 77°F (25°C) | |||
|---|---|---|---|---|
| Altima, Frontier, Maxima, Pathfinder, Sentra & Xterra | ||||
| HO2S1 & HO2S2 | 2.3-4.3 | |||
| Murano & 350Z | ||||
| HO2S1 | 3.3-4.0 | |||
| HO2S2 | 5-7 | |||
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HO2S OPERATING RANGE VOLTAGE
| Application | Lean Volts | Rich Volts | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Front HO2S (1) | 0.0-0.3 | 0.6-1.0 | |||||||
| Rear HO2S | |||||||||
| Altima, Frontier, Murano, Pathfinder, Sentra, Xterra & 350Z (3) | 0.0-0.3 | 0.6-1.0 | |||||||
| Maxima (2) | 0.0-0.3 | 0.6-1.0 | |||||||
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Factory Service Tools
Use the Manual With the Right Hardware
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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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