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Your right about the emissions thing. That's one of the only reasons, plus the gas cap thing, that makes the light come on. Kind of annoying that you can't turn it off without the tool.

I had increased the boost on my T5 slightly well before this light came on and haven't noticed a difference since its been lit. It came on while driving hard in traffic in Boston, think my cats may have overheated. But no change in performance noted. Keep us posted if you find out if it's true (about the lowered boost).

Tony P

98 V70 T5
 
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