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Hi after acquiring a 2007 Mini Cooper which hasn't run for 4 yrs with a broken chain guide which is now fixed and running I am getting code P2414. I am wondering as the car broke down with a full tank of petrol if the petrol has gone off and is confusing the pre cat O2 sensor? If anyone could shed some light or advise it would be much appreciated! Happy new year to all.....Mark.
 

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petrol would pro be in bad way also the the upstream 02 sensor will need a few runs form hot to cold to refined when its running at if makes sense, also if top guide fails most bend valves some full on some very slightly enough to cause misfires
 

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Hi Mike, Thanks for the reply! I was thinking that might be the case! Will do a compression test! Its now developed a bad ticking on one of the tappets so figured it might have bent a valve!
 
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