Cali VX Oxygen Sensor confusion - Fuelly Forums

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Old 12-04-2007, 08:41 PM   #1
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Cali VX Oxygen Sensor confusion

I just bought a '92 VX today. I bought it from the original owners, who bought the car from a San Diego dealership in California. Now I checked under the hood and the car has a 5 wire oxygen sensor, with 7 wires to the connector. There is a California sticker on the hood. My understanding was that the California cars had a 4 wire sensor. What am I missing?

Keep in mind this car is completely untouched and dead stock. The car runs absolutely perfect. It does not have a shift light if that helps.
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Old 12-05-2007, 08:06 AM   #2
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Possible that the original owners bought a non CA version that passed CA emissions.
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Old 12-09-2007, 11:04 AM   #3
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Is there a way to tell if I have the lean burn? Like an ECU part number?
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Old 12-09-2007, 11:14 AM   #4
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37280-P07-"XXX" where XXX = A00 or A01 will be a lean burn ECU

IIRC if XXX = L00 or L01 it will be a cali emissions ECU/non lean burn.
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Old 12-09-2007, 12:19 PM   #5
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It's an L00. Thanks for the info. Strange that the oxygen sensor has 5 wires. I guess if I want the lean burn all I need to do is change the ECU and I'm in business.
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Old 12-09-2007, 07:13 PM   #6
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That is most strange. You don't have the CEL on do you?
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Old 12-09-2007, 08:14 PM   #7
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No on the CEL, just passed smog today. California just added another part to the smog test also. They now pressurize the gas tank with nitrogen to check the evaporative controls.
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Old 12-10-2007, 07:43 AM   #8
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Well, if it's passing CA smog without any troubles and not throwing a CEL... I would just roll with it. As long as it's getting the mileage you want it to with your chosen driving technique, then all is good
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Old 12-10-2007, 01:42 PM   #9
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Huh... '92. That was the first production year for 5th gen Civics. Didn't someone else on the forum recently have this experience? CA emissions sticker, but needed a 5-wire O2? I wonder if Honda switched over to the 4-wire setup at a later date in response to a change in CA emissions requirements. Like maybe only '94-95 CA VXs use a 4-wire setup? Or maybe it's just the '92 year that uses a 5-wire sensor. Just throwing some ideas around.
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Old 12-10-2007, 05:04 PM   #10
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Huh... '92. That was the first production year for 5th gen Civics. Didn't someone else on the forum recently have this experience? CA emissions sticker, but needed a 5-wire O2? I wonder if Honda switched over to the 4-wire setup at a later date in response to a change in CA emissions requirements. Like maybe only '94-95 CA VXs use a 4-wire setup? Or maybe it's just the '92 year that uses a 5-wire sensor. Just throwing some ideas around.
I think you are on to something. I had looked at another CA VX and it had a five wire oxygen sensor, and it was a '92. There was also no shift light in this car. I believe you can run the 5 wire sensor with the 7 wires to the sensor plug with a non lean burn computer. But you can't run a lean burn ECU with the 4 wire setup. I am going to buy a Fed ECU and give it a shot. I want that lean burn and extra 5 mpg. I don't think there are any other differences between the two models.

One other thing was the owner of this car said that you couldn't buy the VX in California after 1992. I doubt this because of the presence of 4 wire VXs.

On the hunt for a Fed ECU.
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