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  1. Mk7 VW Golf, Sportwagen and Audi A3 TDI forums
    So basically when it rains my add blue light comes on and then the check engine Light come on. The warning says to fill add blue or the car won’t start in 600 miles. Here’s the kicker, add blue is full. So I drive the car for a few days and the codes clear. I believe the check engine codes are...
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