well i hope you guys are right, pre cat o2 sensor will be here today, so will fit it after work and hopefully it will fix it, i hope so, cos to be honest i just feel like selling it, knowing my luck it wont be :(
 
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I was the same I was pissed off with it but I fitted the lambda and it was fine again u might have to clear the codes tho
 
well, quick update, fitted the last of the o2 sensor today and shocker, still the same... but, on plus side, unclipped the maf sensor, and bingo, trevor the rever lives! so me thinks ive found the fault, 360quid later lol i think its close to being cured :)
 
Yh I replaced my maf before the lambda so made be its a mix of the two together that causes the problem have you cleared all your dtcs