Hi All,
I bought my first Audi, its a 2000 4.2 A6. After I had driven the car a 1000 miles the check Engine Light turned on. I got it diagnosed and found that the the Error Codes are :

P1128 Heated Oxygen Sensor Signals reversed.
P1130 Lack of Upstream Heated Oxygen Sensor Switch - Adaptive Fuel Limit - Bank No. 1.

My question is what is the cause of these codes and how can I fix them. Also is this something which requires immediate attention? And any rought estimate as to how much it will cost to fix these?

Any help will be appritiated.

-Thanks

Hey its your o2 sensors so you need to get them replaced and the second one is there is a block in the exhaust for some reason so get the new o2 sensor in there and see how that turns out good luck

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2000 S4 silver 6 speed 5% tint all around, dumps exhaust giac chip abd intake and many more to come