[efthimiz]

Hey,

I ran a search prior to posting but did not find any relative results on the forum or web to my issue. I recently completed an oil change and after a few days, the CEL lit up. I ran diagnostics a few times to ensure it was not a fluke but the same 2 codes come back, P0036 / P2270. When reading into codes, here are the results:

P0036 [0x0036]
Heated oxygen sensor (HO2S) 2, bank 1, heater control - circuit malfunction
HO2S Heater Control Circuit
Status: Confirmed
----------------------------
P2270 [0x2270] Archive (inactive)
Heated oxygen sensor (HO2S) 2, bank 1 - signal stuck lean
O2 Sensor Signal Stuck Lean
Status: Permanent

The only info I was able to source is that it could be contaminated fuel in the tank or a burn of excessive amounts of oil which can create deposits on the oxygen sensor.

I ran an oil service maintenance and checked levels which all came back good. I also checked the sensors and they look intact. The oil I used is Mobil 1 ESP Full Synthetic Motor Oil 0W-30 which is on the list as compatable.

Any suggestions or additional red flags I should be aware of before I begin replacing sensors and flushing oil with oem BMW oil?

Much Appreciated.