Replaced my o2 sensor - P1115 - 986 Forum - The Community for Porsche Boxster & Cayman Owners

CJ_Boxster · 01-26-2007, 10:02 AM

I replaced the o2 Sensor yesterday and all alot of the missing HP came back and im already noticing that my mileage is increasing, I drove the car atleast 20 miles and spirited too and the fuel gauge needle moved about a millimeter. Literally, the needle was touching the higher edge of the 1/4 mark on the gauge after the install of the new O2 sensor and after the spirited driving i did afterwards and the drive to work this morning... It now touching the lower edge of the 1/4 mark.

BTW, i have 104k miles on my boxster and when i replaced the 1 bad o2 sensor, i did not get the cel for the other 3 o2 sensors like some forum members experienced.

I also notice that my idle is SO MUCH BETTER, i dont get that little stumble during idle where the rpms will drop from 900 to nearly 400 then back up. Its solid now!

RandallNeighbour · 01-26-2007, 10:45 AM

glad to hear your box is running so much better. However, you may want to run through a couple tanks of fuel to see if the MPG is going up as fast as you think it is.

I do hope you don't throw codes for the other three now as well. I replaced one a while back with a used one that my mechanic had lying around his shop and it worked for a while, then I started throwing codes on another one so I just replaced all four.

If you think your car runs great with one new one, imagine what it would do with a whole set!

CJ_Boxster · 01-26-2007, 11:38 AM

Yeah, im planning on buying the other 3 within a 2 month period. My father has an account with worldpac so the OE type o2's ahead of the cat are $93 and the ones behind the cat are $73 so it wont take long to get them, I should ask his price on a Oil Separator too....

blinkwatt · 01-26-2007, 04:49 PM

Quote:

Originally Posted by CJ_Boxster

Yeah, im planning on buying the other 3 within a 2 month period. My father has an account with worldpac so the OE type o2's ahead of the cat are $93 and the ones behind the cat are $73 so it wont take long to get them, I should ask his price on a Oil Separator too....

I thought they were the same,pre and post cat?

CJ_Boxster · 01-26-2007, 05:58 PM

wires are different length according to the worldpac ordering menu

blinkwatt · 03-05-2007, 01:45 PM

Did you ever change out the other o2 sensors yet? How did swapping 1 o2 sensor hold up?

xclusivecar · 01-26-2007, 02:43 PM

I usually took me 1 week and approx. 200 miles of driving to throw another code after changing an O2 sensor...keep your fingers crossed!!

CJ_Boxster · 01-26-2007, 02:54 PM

1 week, hmmm man, well i hope it doesnt throw a code. Doesnt matter really cause im buying the 3 o2's anyway. I hope the car runs good if it throws the other 3 codes.

CJ_Boxster · 03-29-2007, 12:01 PM

Update here on my single o2 sensor replacment done 01-26-2007, I still havent gotten any codes for any of the other 3 o2 sensors. lucky me.

dcporsche99 · 03-29-2007, 02:19 PM

Hey CJ,
Very cool to hear! Unlike you, I had to change all four ASAP! I have actually been driving my garage queen these past few days that it has been nice in New York. I, too, am happy to report that after almost 200 miles so far, my CEL has remained off. But, of course, now that I have sent this info out into the universe....you know how that goes...lol!!

dcporsche99 · 03-30-2007, 08:07 AM

"...I have been chasing a P1275 CEL code that I started getting when I put on 100-cell cats and had the car chipped. I also replaced all 4 oxygen sensors at that time. We have been playing with moving sensors and we even replaced one of the cats that the code reader said was running at a low efficiency. Like clockwork at 120-125 miles after we mess with the system I get the P1275 CEL again...

That made us think it was the cat on that side, which we replaced last week, I just put on 125 miles, and again got the P1275 CEL,..."

Hi Ed,
Just wondering about your code. Any new updates??? Let us know what you've come up with.

Thanks.

BTW, I see that you have posted an update. I just added it here: Help with P1275 Error Code.

CJ_Boxster · 07-30-2007, 12:22 PM

Well still no extra O2 sensor error codes since replacing only 1 o2 Sensor

Rodger · 07-30-2007, 02:42 PM

Several of my Subaru buddies are using these to prevent those annoying codes. Those 100-cell cats are probably not as good at scrubbing the HCs out of the exhaust as the stock cats, and the O2 sensor is seeing it. How about a blindfold for the O2 sensor? These actually work.

http://www.voodooboost.com/performance_accessories/O2_Simulator/

smartguys · 06-01-2008, 05:21 PM

Hi Guys,

I wanted to be sure I didn't make a mistake.

I see you all are chatting about 02 Sensor readings/replacements. Dealer pulled code, and told me I need 2 sensors replaced. Parts and labor $640!!!!!!!! What a scam.

I bought 2 on ebay. Very cheap.

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=290234863051&ssPageName=ADME:X:RTQ:MOTORS:1123#ht_2808wt_0

They are not custom fit OEM, rather, one sensor fits all -- assuming splicing the wires to the old clip is a simple job.

Question #1: Are these ok to use? The ebay auto parts store, when asked, said yes, as did past customers. I want to be sure.

Question #2: Is there a photo diagram of the replacement process available somewhere that shows how to do this job?

Question #3: DO I NEED 4?

thanks
Kelly