O2 sensor Check engine light...
So I had a check engine light from not having a cat (according to the previous owner) so I installed a 42dd o2 sensor spacer and cleared the existing code
The code was P0420 which is Catalyst System Efficiency Below Threshold (Bank 1) So I went ahead and cleared it, a day or so later the CEL came back and I ran the reader again (I dont have a vag-com and I am just using a normal reader) and it came up with 2 new codes
P0138 - O2 Oxygen Sensor Circuit High Voltage (Bank1, Sensor2)
P0141 - O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 2)
So I am guessing I need to replace the rear o2 sensor? I can just get one of the Bosch ones right? I just unscrew the sensor, unplug it from the box (which is located near the rear o2 sensor right?) and plug it back in and erase the code?
I dont think I need to adjust the spacer at all because the spacer is about as far as it can get...I was only able to screw it on half a turn (which was tough in itself) and it is pretty snug on the pipe. It is also oriented so that the o2 sensor faces the rear of the car.