B16 o2 sensor wiring help

DABBY

New Member
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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CAFROG

Honda Minion
VIP
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.
 

DABBY

New Member
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.

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
 

CAFROG

Honda Minion
VIP
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
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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