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997.2 Oxygen Sensor DIY Replacement

 
Old 07-14-2016, 11:27 PM
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EMC2
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Default 997.2 Oxygen Sensor DIY Replacement

Last December I had a single CEL light come on and a Duranetric scan exposed a code 3104 "catalytic convertor, bank 2 inadequate effect, upper limit value exceeded".

I ran some tests with the car running and both left and right bank sensor graphs appeared to be tracking very similarly (I.e. within spec)

After speaking to the dealer and some friends it seemed best to monitor closely and see if the fault reoccurred.

After many trips at varying speeds over 6 months no more errors occurred until finally about a month back the same code showed itself on the same sensor and bank.

After a bit more research it was clear that these sensors can and do go bad. My car had over 70k miles at the time.

I ordered a replacement sensor:
Porsche 911 09-12 Oxygen Sensor Before Catalyst OEM BOSCH 9A1 606 168 02
Approx $120 shipped

I also bought an oxygen sensor socket to assist with the job.

The job is very easy (and a little more in my case because I don't have the side mufflers installed). With the side muffler out the way you have easy access to the sensor and access in the engine bay is very good also. No need to remove the airbox.

All you need to do is observe carefully the path that the cable follows and where the retaining clips are, to ensure the new sensor cable is properly secured.
The whole job including removing and replacing the rear wheel took about 45 min's as I did it slowly (first time). Could do this again in under 30 mins easily.

It's been about a month now since the swap and no more codes.

Excuse the pollen in the engine bay (pollen season seemed to last a lot longer than usual this year)

















Last edited by EMC2; 07-16-2016 at 12:27 PM.
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Old 07-15-2016, 12:01 AM
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Cloudspin
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Great write up. Thanks!
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Old 07-15-2016, 08:56 AM
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Thank you for posting this. Great DIY!
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Old 07-15-2016, 04:04 PM
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Awesome pics and instructions. Thank you!
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Old 07-20-2016, 10:13 PM
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No problem guys. Hope it helps someone in future
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Old 03-14-2018, 12:21 PM
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Do you how many total sensors are there on a 997.2 ?
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Old 03-14-2018, 02:15 PM
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there are four of them. Two on each side, one before the cat and one after.
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Old 04-07-2018, 12:58 PM
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Great DIY info. However, my problem is how to undo the plastic plugs in the engine bay on the side ? I can't unplug it and I don't want to forcefully breaking it.
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Old 04-07-2018, 01:35 PM
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Great write-up, thanks. Info request from me, Porsche newbie: What is the cylinder layout and bank definition for my '09 Carrera?
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Old 01-17-2019, 12:47 PM
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Is there any procedure or adaptation necessary to let the ECU "know" it now has brand new sensors in place?
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Old 01-17-2019, 02:38 PM
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RichBunch
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Originally Posted by Turboslut View Post
Is there any procedure or adaptation necessary to let the ECU "know" it now has brand new sensors in place?
Should be able to just clear codes.
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