seat emission warning light

[cupraglasgow]

Any ideas what the emission warning light means been on for a few days now, thought it might be a bad batch of fuel .
Its a Seat Leon 1.8 20v turbo.

Thanks

[Gaz Cupra R]

Get over on www.seatcupra.net and place a help needed in Vag-com section as it will need scaning to see what codes it brings up

[matchmaker]

Might be a faulty Lambda probe.

[s2s]

Probably a faulty DV valve, £25 repacement for an uprated Audi TT will sort