Thread: Lambda sensor
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      05-18-2010, 12:31 PM   #3
Mike Benvo
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Drives: 08 E90 M3 / 400whp Turbo 7
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It depends on whether it's your pre cat or post cat 02 sensors. If it's your post cat it's not a huge issue. But if your pre-cat 02's are not reading correctly, it could severly throw off the fuel mixture and cause the car to run poorly.

Check to see what the specific codes are.
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