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Replacing Rear O2 Sensor W/ A Resistor


USMC850T

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The only condition where you can use a resistor to trick the ECU is if the heater on the sensor is bad. The book resistance specs are 1.5-2.5 Ohms at 68° and 6-10 Ohms at 660°. I would guess that a 5 Ohm would do the trick but I suspect that if the heater isn't working it will start throwing efficiency codes. The heater wires are the two white wires.

...Lee

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