I have P112C and P0133 codes on my 2006 bmw 325i. Please help.

Question

I have service engine soon light on and I have the codes read and they came out with P112c and P133. I was told that the P133 is for O2 sensor, but they don't know what P112C meant.

Answer 1

P0133 Oxygen sensor circuit slow response Bank 1 Sensor 1

P112C Oxygen sensor before catalytic convertor , line fault

They are both the same these code refer to the 02 sensor , Sensor 1 , one is stating P112C is a line fault or a open circuit, the other a slow response, in either case you need a 02 sensor