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Old 02-22-2006, 12:28 PM   #1
Vampyr
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Default Question about my Perrin CEL Fix

Just received it for my 05 STi, as I am going to install a race TBE.
I didn't realize, but the Perrin CEL fix is really a O2 simulator.

So I'm confused on how this works. I'm keeping my stock O2 sensor, but just relocating it from the factory position. (using the bung location on the TurboXS TBE)
Isn't this Perrin CEL fix supposed to 'act' like a factory O2 sensor by fooling the computer in thinking that the O2 sensor still works?

Can someone explain why I would need this O2 sim if I'm using my factory O2 sensor? (other than preventing the P code)
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Old 02-22-2006, 12:52 PM   #2
AaronWRX
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search for mechanical o2 cel fix and dont even bother with that perrin fix as it only simulates the o2 and not the heater element.
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Old 02-23-2006, 06:51 PM   #3
Vampyr
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mechanical?! Heater element?!

First off, 05's can't use mechanical (from searching on here).
Second... I know it simulates the O2, my question is, why would a O2 sim be considered a CEL fix?!
I've always understood that you use O2 sims when you are unable to use a stock O2 sensor (due to no bungs to put it in).


Anyone else have some resourceful information for me?
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Old 02-23-2006, 09:35 PM   #4
Gethin
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the readings the rear o2 sees when you remove the cats are different, so you need the electrical fix to fool the ecu into thinking all is well with the rear o2. The mechanical fix does the same by taking the o2 out of the direct exhaust stream to achieve the same thing.
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Old 02-23-2006, 09:44 PM   #5
AaronWRX
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You are wrong about the mechanical fix.
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Old 04-10-2006, 03:12 PM   #6
Vampyr
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Ok.. update to this thread...
I finally installed my TBE.... and after about a day of driving around, I finally got the CEL with the cruise light blinking at me.

My question is... for now, can this be ignored?
I'd like to wait to put my Perrin CEL Fix in over the weekend.
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Old 04-10-2006, 04:43 PM   #7
AaronWRX
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you can ignore your CEL all you want. of course you may have another more serious issue pop up and not know it so it's best to get that fixed as soon as possible.

it's too bad you didnt listen to me. you could have easily installed the mechanical fix while you were installing your exhaust and been done with it.

now you get to
-waste money
-waste time by getting under the car again
-hack up your wiring for no good reason
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Old 04-10-2006, 10:27 PM   #8
Vampyr
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Quote:
Originally Posted by AaronWRX
you can ignore your CEL all you want. of course you may have another more serious issue pop up and not know it so it's best to get that fixed as soon as possible.

it's too bad you didnt listen to me. you could have easily installed the mechanical fix while you were installing your exhaust and been done with it.

now you get to
-waste money
-waste time by getting under the car again
-hack up your wiring for no good reason
Hey now.. you ignored me first.
I just asked how the mechanical fix works. I understand that splicing the wires will basically allow me to fool the car in thinking the O2 works fine.

So I'm still asking, what is it that the mechanical fix does? My O2 senses that my Catalytic Converter isn't working... How does a mechanical O2 fix change that?


Nonetheless, thanks for the advice Aaron, but I already bought my Perrin CEL Fix.
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Old 04-11-2006, 02:44 AM   #9
AaronWRX
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here is the thread. not too late to sell the perrin:
http://forums.nasioc.com/forums/show...96&postcount=7


this will work for you 05.
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Old 04-12-2006, 04:15 PM   #10
metoo
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Do the spacers stop the P0139 code?
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Old 04-23-2006, 05:15 AM   #11
hatchy
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Nothing stops P0139.
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Old 04-23-2006, 10:21 AM   #12
JRSCCivic98
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Quote:
Originally Posted by hatchy
Nothing stops P0139.
Proper EM does...
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