View Full Version : B8 S5 4.2 codes

10-16-2015, 04:07 PM
Car is a 2009 B8 s5 with the 4.2 engine in it. After some exhaust work, car is throwing two codes. P0030 and P0036. I don't have access to a vagcom to see exactly what is going on, but I know the codes are O2 sensor related. Chances are the 02 sensors were damaged during exhaust work. Can anyone tell me what two sensors these codes apply to? I want to order the correct ones

10-16-2015, 04:32 PM
From quick Googling:

P0036 Heated Oxygen Sensor Heater Control Circuit - Bank 1 Sensor 2 (post cat to check cat efficiency)
P0030 Heater Control Circuit - Bank 1 Sensor 1 (pre cat)

I believe these are both on the driver's side.