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Efie, single or dual. turning on?
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jjw2564 Offline

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Efie, single or dual. turning on?
I have a question about 2003 saturn vue. Is it a dual or singal Efie. I have the wiring diagram and I still have questions. Its a four wire o2 sensor. Wh wire 12v, PU wire Ho2S High Signal Sensor 1, TN wire Ho2S Low Signal Sensor 1, and theres D-GN wire Ho2S Heater Low Control Sensor 1. Here is the wire diagram

It shows two o2 sensors but the one down stream I guess does not change fuel, just for reading only.

So is my one sensor a singal or dual o2 sensor, and do i control the High signal or the Low signal. Does the Efie and the hho gas have to turn on the same time or should one turn on first to give it time to work. Should the gas coome on minute before the efie comes on.
03-01-2009 07:52 AM
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Efie, single or dual. turning on? - jjw2564 - 03-01-2009 07:52 AM

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