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Old 11-04-2006, 03:14 PM   #1
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5 wire o2 sensor blues

Alright
Got a "used" 5 wire o2 sensor today for free that a friend of mine took from a running car. I was throwing a code 48 which was Lean Air fuel sensor..

Everything dealing with my o2 sensor is hard wired. Running a cx wiring harness. where i repinned at the ecu to allow for the 5 wire.
I am pretty sure that everything is wired up right or i think i would be displaying more codes than it is. I have the right ecu incase you are wondering.

So anyways, the car is no longer throwing a code 48
It has now moved on to a code 41.

From what i looked up it says that its a bad o2 sensor heater.
I am wondering a couple of things.

first of all, does this mean the new o2 sensor i installed is even worse than the old code 48 one?

second, is there anything i can do to trick the ecu, or hard wire something into the sensor itself.
i searched btw , according to svoboy : "You can run a 1k resistor from POWA to A6 to get rid of that code 41."
Is this also true for a 5 wire? and what effect will it have on gas mileage if the ecu is tricked into thinking the o2 sensor heater is working?

let me know guys

I am trying to be a cheap basterd as long as i can. $300 for an o2 sensor is ridiculous. Making this one work out for FREE would be so much better.
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Old 11-04-2006, 04:00 PM   #2
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Quote:
Originally Posted by FormulaTwo
I am trying to be a cheap basterd as long as i can. $300 for an o2 sensor is ridiculous. Making this one work out for FREE would be so much better.
I too am a cheap bastard. But even if you get this one to work, who knows how long it will last. I paid $315 at autozone for mine (and yes, SVOBoy informed me that I paid too much) and my problems went away immediately. I have had good FE ever since, over 14k miles. I think it was money well spent.
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Old 11-04-2006, 04:27 PM   #3
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Get one on ebay for $170... brand new. Just search for "L1H1"

oxygen sensors have been known to suddenly stop working properly when you switch them out.
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Old 11-04-2006, 09:16 PM   #4
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krousdb -

Quote:
Originally Posted by krousdb
I too am a cheap bastard. But even if you get this one to work, who knows how long it will last. I paid $315 at autozone for mine (and yes, SVOBoy informed me that I paid too much) and my problems went away immediately. I have had good FE ever since, over 14k miles. I think it was money well spent.
It looks like the LAF sensor is the "battery pack" replacement of the VX, so to speak.

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Old 11-06-2006, 11:59 AM   #5
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ok, got a chance to mess with my wiring.....

now i am back to a code 48.
I think the wiring is the issue here soo...

I need to know, the pinouts for the 5 wire o2. I am wiring directly from the o2 sensor wires (no clip, harness etc...) to the ECU.

I need O2 wire color to ECU pinout location.

I have searched everywhere.
I had the info a long time ago but apparently i lost it somehow.

If anyone can help with this let me know

otherwise im still looking
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Old 11-06-2006, 12:13 PM   #6
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HERE is a link to a post I participated in on Honda-Tech when I was doing the opposite of what you were doing - I was taking a VX wiring harness and retrofitting it to accept a 4-wire o2 sensor. There's lots of tidbits of info in there like wire colors, ECU pins, etc. Dig through the post and see if it helps.

EDIT - check out my 2nd to last post in the thread....it's got the most info.
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Old 11-06-2006, 12:15 PM   #7
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Thanks
I just found that a few minutes before you posted it.
im havent had time to decide if its helpful or not yet.

its funny to see how many of you guys are on honda-tech when i search
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Old 11-06-2006, 12:50 PM   #8
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Im still looking

so far.....

O2 sensor wires:

red - sensor element positive
Black - ground
white- control element
yellow - heater -
Orange - Heater +


Ecu:
d14 - heater
a6- heater


so far it looks like yellow and orange will go to d14 and a6?
can anyone confirm any of those?
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Old 11-06-2006, 02:01 PM   #9
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well i checked my wiring
here is how i have it wired up......


o2 sensor wire ---- ecu pin out

WHITE to d16 (VREF signal)
YELLOW to d14 (PHO2S O2 sensor White, heated 02 sensor Signal, 0.4-0.5V when ignition is turned on; drops to less than 0.1V within 2 minutes )

RED
to a25 (Battery positive from Main relay, Battery Voltage with KOEO)


BLACK to ground (to vehicle ground in engine bay)

ORANGE to A6 ( PO2SHTC O2 sensor (heating element) Org/Wht, Battery Voltage with KOEO )



I am still throwing a code 48, after re wiring it this way....
What do you guys say?
wired up correctly or not?
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Old 11-06-2006, 02:18 PM   #10
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dont' wideband o2 sensors put out 1-5 volts? I also alwasy thought they needed a seperate controller to control their membrane or seomthing like that, if your using the stock CX ecu, i woudln't think it would have these abilities in it.
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