bump i am looking for the patch o2 aswell. any help would be appreciated!

 

Do an advanced search for "P0037" in the title. There are a couple threads with the code you need to add in them.

 

Fat chance anyone cares but why not drill a hole in the pipe and weld a bung in for the wide band sensor. Then you don't have to worry about codes

 

you could do this but if your getten it tuned have the tuner delete the rear o2

 

IM new to the evo scene and learning about my car everyday. My tuner suggested I go from my aem standalone to stock flashed ecu since my evo is my daily driver. My evo had no o2 sensor. How much will installing a 02 sensor help with driveability and fuel efficiency?

 

Just run Tephra rom? You can plug the rear o2 sensor and delete the check engine code. Either that or run a wideband to the rear 02, plus rear 02 is useless anyways especially if you have a test pipe, or no cat.

 

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