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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
(1) Measure resistance between appropriate HO2S terminals. For complete HO2S testing, see appropriate DTC test in appropriate SELF-DIAGNOSTICS article.
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
(1) Engine at normal operating temperature. Maintain engine speed at 2000 RPM.
(2) Revving engine from idle up to 2000 RPM.
(3) Revving engine from idle up to 3000 RPM.
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