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Code reader clear CEL?

 
Old 11-08-2017, 11:47 AM
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PPFANBOY
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Default Code reader clear CEL?

Hi all,

My current exhaust setup sometimes results in CEL on my 991.2. It is sporadic and I can't really explain it.

Can anyone suggest an easy to use code reader I can use to delete the CEL when it does pop up? (I find it very annoying and until a tune is available, I need an interim solution).

Cheers!
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Old 11-08-2017, 05:24 PM
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Are you using adapters on your bypass for the rear most O2 sensors? If so, are you also using the smallest plugs within those adapters?




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Old 11-08-2017, 09:58 PM
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Need to check! I'm not sure.
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Old 11-08-2017, 10:03 PM
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Thanks for clear pics. Will check with my tuner.
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Old 11-08-2017, 11:21 PM
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For people running catless, you basically don't even need the rear most O2 sensors to be exposed to the exhaust gases. They are just there to tell your ecu that your emission system is working properly and that the cats are scrubbing the gases sufficiently before it exits into the atmosphere. That's why you use the insert with the smallest hole in the adapters. You could even plug up those adapters so no gases goes to the sensors and you will never get a CEL for being catless again.
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Old 11-09-2017, 12:07 PM
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why not just tune it and do cell delete?
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Old 11-09-2017, 01:20 PM
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991.2 turbo. No tune.
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Old 11-09-2017, 01:59 PM
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Originally Posted by PPFANBOY View Post
991.2 turbo. No tune.
991.2 turbo can be ECU tuned no problem. It's an SDI21.3 ecu from Siemens
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Old 11-10-2017, 01:50 AM
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Originally Posted by DIM4 View Post
991.2 turbo can be ECU tuned no problem. It's an SDI21.3 ecu from Siemens
Who is tuning it?
I think Giac are the only ones ATM, that is for the Turbo S though.
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Old 01-18-2018, 02:29 AM
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Any solutions? I had a mini orange cel reader/eraser but it isn’t clearing my cel either.

Im running catless with the smallest adapter and still got a cell after parking the car for a few days.
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Old 01-18-2018, 11:10 AM
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Originally Posted by PPFANBOY View Post
Who is tuning it?
I think Giac are the only ones ATM, that is for the Turbo S though.
GIAC and By Design.

Manuel
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Old 01-18-2018, 12:00 PM
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You can just plug up the smallest adapter so that no gases get to the farthest O2 sensor. That sensor is not needed anyways for your engine's AFR calculations. It's just for emissions which by you going catless, you are not worrying about anyways.

Which adapters are you using? And are you sure you secured the small ring clamp properly to secure the insert?





Originally Posted by C4SxM5 View Post
Any solutions? I had a mini orange cel reader/eraser but it isn’t clearing my cel either.

Im running catless with the smallest adapter and still got a cell after parking the car for a few days.
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Old 10-28-2018, 12:26 AM
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Originally Posted by JW1 View Post
You can just plug up the smallest adapter so that no gases get to the farthest O2 sensor. That sensor is not needed anyways for your engine's AFR calculations. It's just for emissions which by you going catless, you are not worrying about anyways.

Which adapters are you using? And are you sure you secured the small ring clamp properly to secure the insert?
Will plugging them completely fix the problem? Don't the sensors need to breathe? I am using these Vibrant spacers on a catless exhaust too but I am still getting the CEL for both banks.
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