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96 Civic EK hatch with GSR O2 Sensor problem

Discussion in 'Civic and del Sol - EG and EK' started by Valo, Jun 16, 2010.

  1. Valo

    Valo New Member

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    The O2 sensor is plugged into the header but I simply can't find a plug that comes from the harness that will match up. The car is a 96 CX with a p28 and a jumper harness. Right now i'm doing about 16 MPG and guessing that this is the culprit. How can I find the plug from the harness? The O2 sensor that is bolted up to the header is a 4 wire o2 sensor. Also, there is 1 cable that is a 2 wire (green and black) that is coming from the harness but it is cut. and another clip but it looks like a 3 pin. Any help would be greatly appreciated, my gas mileage is really suffering.
     
  2. ihatemyprelude

    ihatemyprelude New Member

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    That green an black wire is for vapor can i bet.

    Wire the O2 right to the ecu. Do a google search ( How to wire o2 sensor to ecu ) something like that... its very easy just remember not to cut any power or grounds just splice them. .:FFS TechNet : OBD1 ECU Pin out Schematics :.

    " Right now i'm doing about 16 MPG and guessing that this is the culprit " Your foot is the culprit sir.
     
  3. ihatemyprelude

    ihatemyprelude New Member

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    Is your ecu obd2 or obd1? You may need another wiring diagram. And that 3 wire senor could be tps, map, vss do you have any codes ? We cant help you without any codes.
     
  4. Valo

    Valo New Member

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    its a p28 so i'm guessing obd1, it is obd1 by the looks of it, since it has a jumper harness and my car is obd2.
     
  5. dextercivic

    dextercivic New Member

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    Did you do a wiring harness swap? If it still the stock harness, then it will be a grey four wire square plug with the wire colors: Green, White, White/black, and Black/Yellow going into it. this is the plug for the primary o2 sensor atleast. I'm not going to crawl under my car today to check the secondary plug.
     
  6. Valo

    Valo New Member

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    I really only need to o2 primary plug location, I'm guessing its a stock harness because theres a jumper harness going into the ecu. I myself didn't do the swap. In what area of the car is that female 4 wire plug? I've searched everywhere.
     
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