Oxygen Sensor removal

[dr_karlb]

So my intermittent oxygen sensor slow heat up CEL became more permenant...

SO i have the new sensor and wrench on order, dur to show up in a day or two.

I looked at the sensor on the car today, and i cant see how i can get it out ?

Is there a DIY ?

I cant see a place to even get my hand near enough to touch it.

Do i go in from the top ?

Its the one After the CAT, so it looks like its mounted on the exit conical part of the CAT itself.

Is there a trick or do i just start removing the exhaust system until i can get access ?

Thanks

[1999Porsche911]

So my intermittent oxygen sensor slow heat up CEL became more permenant...

SO i have the new sensor and wrench on order, dur to show up in a day or two.

I looked at the sensor on the car today, and i cant see how i can get it out ?

Is there a DIY ?

I cant see a place to even get my hand near enough to touch it.

Do i go in from the top ?

Its the one After the CAT, so it looks like its mounted on the exit conical part of the CAT itself.

Is there a trick or do i just start removing the exhaust system until i can get access ?

Thanks

Remove from the bottom. You can also easily remove it with an open end wrench. No special tool needed.

[c4bliss]

I have the same issue, o2 out and CEL on. Thinking of replacing them myself, no special tools needed or tear down to get them out? What about where they plug into?

[1999Porsche911]

I have the same issue, o2 out and CEL on. Thinking of replacing them myself, no special tools needed or tear down to get them out? What about where they plug into?

To remove the sensor, disconnect the connector in the engine compartment and pull it down to the bottom of the car. Then simply unscrew the sensor using whatever wrench fits. Why do you think your O2 sensor if bad? Have you looked at it's readings. What CEL code are you getting?

[dr_karlb]

I got codes P0139 and P1117.

Loren informed me this was the after CAT o2 sensor, and a slow heater response... aging of the sensor in them list.

I connected and disconnected a few times to clean the contacts.

It went away for about a month after a hard drive and an AX event, but now its back more permenant.

Thanks for the info about removal... hope i have skin on my knuckles after this one :-)

[c4bliss]

To remove the sensor, disconnect the connector in the engine compartment and pull it down to the bottom of the car. Then simply unscrew the sensor using whatever wrench fits. Why do you think your O2 sensor if bad? Have you looked at it's readings. What CEL code are you getting?

Yes, i had them read, and they were the O2 sensors. Im not sure which codes, but im going to find out.

Thanks for the info. Where to get them is the next question? Suncoast?

[dr_karlb]

Thanks to all for the advice.

I changed out the sensor this weekend in not more that 15-minutes and all seems good so far.

The regular wrench worked fine... i purchased the crows foot and it was useless as it wouldnt fit in that location

The Bank1 Sensor2 is really hard to get to by hand from the bottom, so i unclipped the "snorkel" inlet to the airbox and could get my hand down to unscrew, once it was loosened from the bottom with the wrench.

Oh, i purchased the sensor from oxygensernsors.com as Loren posted the link. The dealer wanted $350 for the sensor !!! Online it was about $100

Edited September 18, 2006 by dr_karlb

[c4bliss]

ok, my codes are 1123 and 1125?

which are those, sensor wise, and where do i get them?

[Loren]

ok, my codes are 1123 and 1125?

which are those, sensor wise, and where do i get them?

P1123 Oxygen Sensing Adaptation Area 1 (Cylinders 1 - 3) - Lean Threshold

P1125 Oxygen Sensing Adaptation Area 1 (Cylinders 4 - 6) - Lean Threshold

These codes say your mixture is too rich for the DME to control (it has reached it leaning threshold). The O2 sensors are reporting the problem - they are not likely the cause.

This could be something as simple as an open EVAP canister purge valve.

[c4bliss]

Thank you Loren!

Time to make a trip to the stealer!

[gas-man]

Loren about the open EVAP canister purge valve is this something that you have to bring to the dealership or can this be done DIY? and how? Thanks

[Loren]

Check the gas cap seal first then go after the cannister purge valve.

If both are okay then it be the MAF (reading less air that actual).

[dieterro2]

ok, my codes are 1123 and 1125?

which are those, sensor wise, and where do i get them?

P1123 Oxygen Sensing Adaptation Area 1 (Cylinders 1 - 3) - Lean Threshold

P1125 Oxygen Sensing Adaptation Area 1 (Cylinders 4 - 6) - Lean Threshold

These codes say your mixture is too rich for the DME to control (it has reached it leaning threshold). The O2 sensors are reporting the problem - they are not likely the cause.

This could be something as simple as an open EVAP canister purge valve.