I recently got an error code po161 and changed my oxygen sensor after the cat. I got it from eBay and after changing it I am getting error code p0160 now. I thought it might be a cheap sensor I got on eBay so I ordered a Bosch O2 sensor and I'm getting the same code. Any ideas what this could be? Also when I screw in sensor it looks like there may be a very tiny Gap with a sense of goes in. Another words that look like it may be able to screw in another turn or two. Could this be causing the code. Does the sensor have to be exactly flush with the pipe. When I try to turn it more it's actually stripping and don't want to make it worse than it is.