Hey guys, I have a 2001 N/A that has thrown a P0137 diagnostic code. I understand that the code is for [font="arial, sans-serif;"]the O2 sensor for bank 1 sensor 2 is failing to increase the voltage output above[/font][font="arial, sans-serif;"] .21 Volts i[/font][font="arial, sans-serif;"]ndicating excessive oxygen in the exhaust. I also[/font] know that most will say change the post cat lamda sensor and call it a day. I was just wondering if the ones more knowledgeable about engine tuning and diagnostics could tell me if this was of my doing and a lamda sensor wont fix it or with 105,000 miles of driving it has just died...
To give you all of the details of the current status of the car I need to let you know that I am in the process of a few upgrades. These were scheduled to be drawn out over a year to bring down the sticker shock to the misses. The car has a carbon ITG intake, 2.4L inlet manifold and accompanying EGR delete and cheater. I am planning on fabricating a 1.75" primary tube exhaust manifold and accompanying 2.5" tailpipe section with a Flowmaster cat and Flowmaster DBX series muffler. After completing the exhaust I was going to upgrade the ECU with the OBD Tuner firmware and possibly a mild cam and valve springs. I also have a universal catch can that I have installed that up until the colder weather never collected any condensate, but when under 50 degrees F or so captured a decent amount, like 1/4 cup maybe over a week.
The code was thrown approximately 1,500 miles which is about 4 months time after the aforementioned modifications. The car shows no signs of hesitation, misfire or anything like that. It is probably running a bit rich from the EGR delete and cheater install as my mileage went from ~35 mpg pre to ~32 mpg post modification.
I have ordered two universal Bosch O2 for grins and will check the harness leading up to them for any shorts before changing. Let me know what you think.
For inspiration I have included a pic of what it means to use a VX220 as your daily driver
https://drive.google...XmtP8kIQD4gkm1H
