MK6 VW GTI O2 Sensor Replacement P0036 P0037 (Post-CAT)

I had the P0036 and P0037 trouble codes for a little while. Did some research and figured out that the rear o2 sensor most likely had to be replaced. So I replaced it and as of today (roughly 3 weeks later) those codes have not returned. Hope this video helps you out if you're in the same boat as I was!

For reference, my GTI is a 2012 MK6 with the CCTA engine. What the CCTA basically means for this job is that my engine only has two o2 sensors, one on the downpipe and one after the catalytic converter.

Both the P0036 and P0037 trouble codes had to do with the heater circuit on the rear sensor specifically. There was nothing mentioned about the front sensor, so that's why I only replaced the rear sensor.