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Lambda sensor reading



Ray Gin

ClioSport Club Member
  Cupra Leon & Impreza
Plugged my car into a snap on diagnostics machine and the pre cat reading on idle, when warm, was around ~460 or so, can't remember exactly. The reading from after the cat was around ~40. This can't be right surely?

Before christmas a lambda sensor fault was showing on the same machine, but now it's not showing any faults at all.

Just to add there is a grey wire under my ashtray which had been snipped for some reason, when I joined the wire up again it was popping a lot more than usual.

Again, no codes were showing when the wire was joined up.

Any ideas? The car has a decat pipe fitted. (2005 182)
 

Ray Gin

ClioSport Club Member
  Cupra Leon & Impreza
Anyone? That wire is coming from the pre cat lambda and the post cat reading are going up and down from 50-700.....time for a replacement?
 


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