Sierra Oxygen Sensor Tester/Simulator 740584

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  • For testing and diagnostics on any Oxygen Sensor, to quickly determine whether the sensor is defective and needs replacement.

    • Signal output shown in real time on LED bar graph.
    • Auto detection of common wire misconnections.
    • Works with zirconium, titanium & air/fuel ratio sensors.
    • Comes with hard shell carrying case.