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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > BMW Coding > 02 sensor code after dp install



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      06-24-2014, 05:02 PM   #1
Ohshtkevin
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Drives: 2007 335i
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02 sensor code after dp install

I have an 07 335i my cobb access port reads P2C9E "Lambda sensor heating the catalyst 1, triggering" it then goes on to say that this is typically caused by a failing 02 sensor.

This code started when I got the four bolts connecting the downpipe to the rest off the exhaust blown off with a torch so i thought it was just caused by the exhaust leak made thereafter. I drove my car home slowly less than a mile from the shop that blew the bolts off for me. I then installed my new AA dp and the code is still there even after clearing it.

Do I have a bad 02 sensor or could it be something else? And if it is an 02 sensor how should I go about figuring out which one it is?
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