Nissian Micra 1.0 X reg?

Hello need help,
saturday i had my engine steamed clean since cleaning running problem issue car runs like if its running on 3 spark plug affect although had a lamber sencor replaced saturday light stays on rest code not working now spultters no speed oxgens in sencor like before went before fixed that issue before now the sencor is saying engine light is flashing i think water has got in sencors somewhere, had the lamber sencor replaced sunday just gone 26-10-08 fault there its getting worse, any ideas please send to vwd2006@shaunore.co.uk need a good mancanic in local area of Wednesbury west midlands please help