my CEL have been on for long over a year becuse i have testpipes instead of katīs.

but now i have on my katīs again. killed the CEL but the second time i start the car the CEL pops up again.

the code says P0037 with means O2 Sensor Heather .

my question is witch one it is that i need to change.

i read somewhere that is is Bank 1 sensor 2. but i still dont know witch one of the 4 it is.

if its any of the one sitting on the kats then it doesent mather becuse the test pipes are coming back on soon. but if its the upper ones then its more important i think.

im having my TurboXS UTEC installed soon but im still afraid of the car going in some kind of limp mode

 

Here are details about P0037: http://www.nissanhelp.com/diy/obd_codes/p0037.htm. Believe that bank 1 is the passenger side.

 

Perfekt answer. thanks!

the thing is that i have allready changed that one but i guess it wasnt right one for my car.