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B16 o2 sensor wiring help

Discussion in 'Civic and del Sol - EG and EK' started by DABBY, Apr 10, 2019.

  1. DABBY

    DABBY New Member

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    Hey everyone! Just got my first honda, everything is great and she runs nice. The only problem is that it's throwing OBD1 CEL code 1 for the O2 sensor which makes sense because whoever did the b16 swap just cut the wiring off for the sensor. Well anyways I wanna wire it back up and I'm planning on drilling a hole in my headers(for a bung), DC sports aftermarket, and welding a bung to mount the O2 sensor. The only problem is that I know the sensor has 4 wires, but my wiring on the harness only has 3 wires and not 4. There is a black wire, a green/yellow wire, and a blue wire. Please help!! Haha
     

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  2. CAFROG

    CAFROG Honda Minion VIP

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    I'm getting old and forgot too much but I believe you have a different engine harness (compared to your motor) and you need to have a 4 wire from the O2 sensor to ecu.

    Safe way is to run another engine harness. B16A3 del so wire harness but those are rare. A 94-95 Integra GSR B18C1 engine harness would work. A D16Z6 engine harness (EX and Si OBD1) works great but you need to run knock sensor or disable knock with a chip or something.

    There are cheaper ways. You could get the wiring diagram for the B16 and fix the O2 wiring. Depends on your ECU.

    You would need a plug with pigtails and run the extra wire to your ecu (with a donor pin and pigtail to insert into your ecu plug)

    Your DC header doesn't have a bung for an O2? Never seen one without a bung.
     
  3. DABBY

    DABBY New Member

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    I have a p30 ecu denshigiken, I'm thinking of maybe just getting a hondata and getting it tuned? That way they can disable the sensors and just correct the air fuel ratio. Lmao I have a dam head ache
     
  4. Briansol

    Briansol Admins Admin VIP

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  5. CAFROG

    CAFROG Honda Minion VIP

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    I believe you'll still need to run a 4 wire O2 with Hondata. But Hondata is a good choice. I think your ECU is stock. I say different engine harness and Hondata is the way to go. But B gave a link to the wiring. You could take a shot at that. I ran the stock P30 with a B16 with no CEL's in my EG 10 years ago.
     
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