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Whats up guys I have a 2003 civic EX I went to put on two after market gauges and have two questions about each. 1st with the air/fuel ration gauge I know it goes to the o2 sensor and a guy said A white wire ok looked at it and there are two white wires, black , and grey I am completely lost, and I tried both white and nothing worked and my check engine light came on...so 1st question what can I do to get the gauge to work? About the 02 sensor will that make the check engine light come on?


The other gauge is the oil pressure and does that go to the oil sending unit?

If my 02 sensor is messed up can I wire it to my ECU and does anybody know where I can find the color code for my ecu?

 
Rep Power: 0

its the black wire dude. Trust me it works on my car! As 4 the oil pressure ull need a T fitting and yes it goes to the oil sending unit behind the block. I hope its electrical oil gauge cuz its safer

 
Rep Power: 812

Those cheap air/fuel gauges mess up the 02 sensor.

 
Rep Power: 397

Hmm so my Defi gauge (which is not cheap lol) will mess up my 02 sensor? =*(

 
Rep Power: 0

thanks guys I had no idea a guy told me the white wire. Now the o2 sensor isn't working. Because the check enigin light is on. If you guys have any more ideas about the setup let me know. Now do I need to wire the air/fuel ratio gauge to my ecu since the o2 sensor is not working?