Re: Mercedes E240 V6 (2001) Cat efficiency Archived Message
Posted by martin wainwright on June 18, 2007, 12:46 pm, in reply to "Re: Mercedes E240 V6 (2001) Cat efficiency"
Hi Dave, I have seen lots of this fault on different types of car it’s always when cheep aftermarket cats are fitted! I think you are using a 2 channel scope that is the reason you are not checking all 3 lambda sensors at the same time. But if all the Lambda sensors are switching and the rear cat is responding when the car is hot it must be the cats at fault. I would send them back under warranty put sum money towards OE ones. HTH, Martin.
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