DIY: Primary o2 sensor replacement

FG-JOE · 05-14-2009, 12:31 AM

ok so my replacement came in today

why the need?

heres the story:

one of my studs on the cat stripped and i changed it, no brainer take a hammer to it, just like replacing wheel studs. replaced it no problem. so i finish installing my apexi WS2 exhaust and i get a CEL. get that checked out, come to find out i broke me first o2 sensor....WTF!!

anyways, for those who ever comes across of changing your oem cat studs PULL YOUR O2 SENSORS OUT FIRST!!!

i hated the though of this because i was getting my RH that weekend this happened.

o2 sensor wasnt so bad, got it off of collegehills honda for about $120 shipped. called autozone they had one "exact thing" for $2XX, i was like yeah right....

Broken sensor:

This install took me about 15 minutes top.

Tools need:
7/8's wrench

Part number for o2 senor

1st:thing you want to make sure your car is cool

2nd:make sure you have a jack and jack stands.

3rd:after getting under the car locate your PITA...oh i mean sensor. un clip the sensor

4th:use a 7/8's to loosen it

5th:locate the plug where it goes

6th:unclip the plug

7th:tighten the new o2 sensor

8th:connect the plug, clip it back on(i almost forgot)

9th:reset the battery

10th:enjoy having a no CEL

feel free to ask me any questions.

a1j7g · 12-30-2009, 12:54 PM

will need this later

noumen_arete · 06-06-2010, 03:19 PM

I'm goint to clean the sensor, but where is it located? i can't tell from the pics,

I Vtec, do you? · 06-06-2010, 05:02 PM

it's located right before the cat.

how did you do this in 15 mins? it took me like 20 mins to finaggle a screwdriver up into that crevice and use it to unclip the sensor lol

Lucky4k1129 · 06-08-2010, 12:02 AM

i was wondering how to do this though you might need a special thingy like you do for the spark plugs now that ive seen this i am going to clean my o2 sensor

bro2snakeaterblk08 · 06-08-2010, 12:35 AM

^be gentle with it. I cleaned mine and shook it a lil bit too hard when i was shacking the excess fluids out and facked it up.

starfranchise11 · 09-18-2010, 04:42 PM

I just installed my O2 sensor yesterday, quick job to do.. But my CEL came on about 30 miles later..? Should i change the exhaust or the headers next?

02civicsi · 09-18-2010, 05:11 PM

What mods do you have on your car that would mandate a replacement of the primary?

Drew_187 · 09-18-2010, 05:17 PM

I wouldn't imagine mods be the absolute cause, my primary went out out of nowhere before I upgraded to an aftermarket header. no clue why it did

starfranchise11 · 09-22-2010, 12:46 AM

I have Apexi WS2 exhaust..But i still have stock headers.. Could that be the issue? or maybe a bad CAT..???

02civicsi · 09-22-2010, 12:48 AM

How many miles are on your car?

starfranchise11 · 09-22-2010, 12:53 AM

Around 80k

racekar · 09-22-2010, 12:56 AM

id buy the o2 sensor removal tool at autozone. easy to get off without worry of stripping

like 10 bucks

starfranchise11 · 09-22-2010, 01:00 AM

I changed it with no problem, the CEL just happened to turn back on.. I'm just in debut if i should just change the headers or just replace the CAT...

02civicsi · 09-22-2010, 01:09 AM

Or just use a 7/8 open wrench

Is your car an R18 or Si?

starfranchise11 · 09-22-2010, 08:32 AM

06 si..

02civicsi · 09-22-2010, 08:55 AM

The cat for an FG2 is like $1k from Honda

You can get a S2 header for a lot less than that.

starfranchise11 · 09-22-2010, 12:35 PM

I just hope it turns the CEL off...

fijibluenewb · 10-02-2010, 01:57 PM

What code is the CEL popping?

navigator_04 · 10-04-2010, 09:58 PM

My 07 Si gave me a P0134 code... It's primary 02 sensor... I have a S2 RH and LSD catback... I need to either buy a replacement or clean it right? Or I read u should check ur hoses including my intake right?

05-14-2009, 12:31 AM	#1 (permalink)
FG-JOE Senior Member Join Date: Oct 2007 Location: North of the Grapevine Age: 21 Posts: 4,281 Joseph	DIY: Primary o2 sensor replacement ok so my replacement came in today why the need? heres the story: one of my studs on the cat stripped and i changed it, no brainer take a hammer to it, just like replacing wheel studs. replaced it no problem. so i finish installing my apexi WS2 exhaust and i get a CEL. get that checked out, come to find out i broke me first o2 sensor....WTF!! anyways, for those who ever comes across of changing your oem cat studs PULL YOUR O2 SENSORS OUT FIRST!!! i hated the though of this because i was getting my RH that weekend this happened. o2 sensor wasnt so bad, got it off of collegehills honda for about $120 shipped. called autozone they had one "exact thing" for $2XX, i was like yeah right.... Broken sensor: This install took me about 15 minutes top. Tools need: 7/8's wrench Part number for o2 senor 1st:thing you want to make sure your car is cool 2nd:make sure you have a jack and jack stands. 3rd:after getting under the car locate your PITA...oh i mean sensor. un clip the sensor 4th:use a 7/8's to loosen it 5th:locate the plug where it goes 6th:unclip the plug 7th:tighten the new o2 sensor 8th:connect the plug, clip it back on(i almost forgot) 9th:reset the battery 10th:enjoy having a no CEL feel free to ask me any questions. Last edited by FG-JOE; 05-14-2009 at 12:32 AM.
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09-22-2010, 08:55 AM	#17 (permalink)
02civicsi Senior Member Join Date: Jan 2007 Location: Seeing the beauty of the world in a drop of morning dew Posts: 27,430 I am the Juggernaut!!!	The cat for an FG2 is like $1k from Honda You can get a S2 header for a lot less than that. Last edited by 02civicsi; 09-22-2010 at 09:00 AM.

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12-30-2009, 12:54 PM	#2 (permalink)
a1j7g Senior Member Join Date: Jan 2008 Location: Springfield, MO Posts: 1,503 Andy	will need this later

06-06-2010, 03:19 PM	#3 (permalink)
noumen_arete Senior Member Join Date: Mar 2007 Age: 24 Posts: 173	I'm goint to clean the sensor, but where is it located? i can't tell from the pics,

06-06-2010, 05:02 PM	#4 (permalink)
I Vtec, do you? Senior Member Join Date: Jan 2007 Location: MN Age: 23 Posts: 14,558 Jeremy	it's located right before the cat. how did you do this in 15 mins? it took me like 20 mins to finaggle a screwdriver up into that crevice and use it to unclip the sensor lol

06-08-2010, 12:02 AM	#5 (permalink)
Lucky4k1129 Senior Member Join Date: Nov 2008 Location: Pomona California Posts: 588 Jeff	i was wondering how to do this though you might need a special thingy like you do for the spark plugs now that ive seen this i am going to clean my o2 sensor

06-08-2010, 12:35 AM	#6 (permalink)
bro2snakeaterblk08 Senior Member Join Date: May 2009 Location: Jacksonville, FL - Orange Park Posts: 5,928 Artem	^be gentle with it. I cleaned mine and shook it a lil bit too hard when i was shacking the excess fluids out and facked it up.

09-18-2010, 04:42 PM	#7 (permalink)
starfranchise11 Junior Member Join Date: Sep 2010 Location: Philadelphia Age: 23 Posts: 10 Tony	I just installed my O2 sensor yesterday, quick job to do.. But my CEL came on about 30 miles later..? Should i change the exhaust or the headers next?

09-18-2010, 05:11 PM	#8 (permalink)
02civicsi Senior Member Join Date: Jan 2007 Location: Seeing the beauty of the world in a drop of morning dew Posts: 27,430 I am the Juggernaut!!!	What mods do you have on your car that would mandate a replacement of the primary?

09-18-2010, 05:17 PM	#9 (permalink)
Drew_187 Senior Member Join Date: Jan 2009 Location: Houston, Tx Age: 23 Posts: 1,240 Andrew	I wouldn't imagine mods be the absolute cause, my primary went out out of nowhere before I upgraded to an aftermarket header. no clue why it did

09-22-2010, 12:46 AM	#10 (permalink)
starfranchise11 Junior Member Join Date: Sep 2010 Location: Philadelphia Age: 23 Posts: 10 Tony	I have Apexi WS2 exhaust..But i still have stock headers.. Could that be the issue? or maybe a bad CAT..???

09-22-2010, 12:48 AM	#11 (permalink)
02civicsi Senior Member Join Date: Jan 2007 Location: Seeing the beauty of the world in a drop of morning dew Posts: 27,430 I am the Juggernaut!!!	How many miles are on your car?

09-22-2010, 12:53 AM	#12 (permalink)
starfranchise11 Junior Member Join Date: Sep 2010 Location: Philadelphia Age: 23 Posts: 10 Tony	Around 80k

09-22-2010, 12:56 AM	#13 (permalink)
racekar Senior Member Join Date: Mar 2008 Location: california Posts: 1,346	id buy the o2 sensor removal tool at autozone. easy to get off without worry of stripping like 10 bucks

09-22-2010, 01:00 AM	#14 (permalink)
starfranchise11 Junior Member Join Date: Sep 2010 Location: Philadelphia Age: 23 Posts: 10 Tony	I changed it with no problem, the CEL just happened to turn back on.. I'm just in debut if i should just change the headers or just replace the CAT...

09-22-2010, 01:09 AM	#15 (permalink)
02civicsi Senior Member Join Date: Jan 2007 Location: Seeing the beauty of the world in a drop of morning dew Posts: 27,430 I am the Juggernaut!!!	Or just use a 7/8 open wrench Is your car an R18 or Si?

09-22-2010, 08:32 AM	#16 (permalink)
starfranchise11 Junior Member Join Date: Sep 2010 Location: Philadelphia Age: 23 Posts: 10 Tony	06 si..

09-22-2010, 12:35 PM	#18 (permalink)
starfranchise11 Junior Member Join Date: Sep 2010 Location: Philadelphia Age: 23 Posts: 10 Tony	I just hope it turns the CEL off...

10-02-2010, 01:57 PM	#19 (permalink)
fijibluenewb Senior Member Join Date: Mar 2008 Location: VA Beach Age: 33 Posts: 164 Matt	What code is the CEL popping?

10-04-2010, 09:58 PM	#20 (permalink)
navigator_04 Senior Member Join Date: Aug 2007 Location: Houston Posts: 211	My 07 Si gave me a P0134 code... It's primary 02 sensor... I have a S2 RH and LSD catback... I need to either buy a replacement or clean it right? Or I read u should check ur hoses including my intake right?

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