P0420 CEL light fix

Bumblebee

New Member
After much reading and asking around I think I have found a cure for the P0420 CEL that the CJ CY CF lancer will give you after a high flow catalytic converter is installed.
The error won't show up straight away , took quite a few hundred kilometres to show up.
Im pretty confident I have got it sorted by buying a mini cat adaptor from eBay.
I have put all the info together here


Hope this helps someone else

Cheers
 

Ryan

Administrator
Forum Administrator
From memory this only briefly worked for me but then the CEL came back.

I had stock cat with RRM headers (which had to have a new flex joint installed locally as their *poo* one failed)....
 

Bumblebee

New Member
Been one week now. Done a few hundred kilometres since I dropped the mini cat onboard.
Zero issues since installed.
I think we have a winner.
No excuses for not running a full system on the lancer now.
Enjoy
 
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