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Engine Check Light On - P1128 and P1130

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Engine Check Light On - P1128 and P1130

This is a discussion on Engine Check Light On - P1128 and P1130 within the Computer and Fuel Systems forum, part of the Audi Reviews category; Hi All, I bought my first Audi, its a 2000 4.2 A6 . After I had driven the car a ...

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04-20-2008, 04:34 AM

audia8

Senior Member

Join Date: Apr 2008

Posts: 1,500

Engine Check Light On - P1128 and P1130

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

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