The front O2 sensor is fine?
A while back pulling in to my friends driveway, which is very unfriendly to low cars, my car threw a CEL.
The code was P0037. Yesterday I decided I would try to fix it. I pulled the O2 sensor out (rear one) and saw that the insulation that covered the wires was ripped, and the 4 wires appeared to be broken. Thinking it'd be an easy fix, I cut the broken part of the wires out, and using butt connectors and heat shrink I wires them back together. Then I re-installed the sensor and had the code cleared. P0037 came back shortly thereafter.
Figuring that once the wires broke it may have shorted the sensor out or something I went and bought a new sensor. Because none of the 3 dealerships had OEM ones and none of the parts stores could get exact fit ones I bought a Bosch universal O2 sensor.
Using the included wiring kit I wired the new sensor up to the plug from the old O2 sensor and plugged it in. Disconnected the battery to clear the code, then drove roughly 10-15 miles without the CEL coming back on. Then on my way to get re-flashed back to stage 2 today the CEL came on. When I got it scanned it came up as P0036. Which practically reads the same as the other code.
Sorry for such a long post, the spelling and grammar may or may not be 100% up to par because this was posted on my iPhone, but I'm out of ideas and getting kind of desperate. Any help would be GREATLY appreciated.
Last night double checked the wiring on the new sensor to the old plug and it's correct, also checked the wires ahead of the plug, there are no breaks or holes in the wire insulation.
Could it be possible that the heating element in the sensor is bad? It is s brand new sensor, and even if it is how would I go about testing it?
I am going to bump this up for some more input. I am picking up a car on thursday that I know is throwing p0031 and p0037. From waht I have read up on it, fuses can be an easy fix for it. Can anyone post up a fuse diagram showing which fuses I should look into first. I may also just be replacing the post cat o2 sensor anyway as the PO said it has some electrical tape on it.