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Var · 12-17-2003, 02:05 AM

A quick way to see if it is cat related is to check under the car for an 02 sensor. There is obviously one at the exhaust manifold
(pre-cat) . If there is one after the cat(post-cat) then the MIL came on for a reason...that second 02 sensor is a catalyst effiency sensor. It senses if the cat is doing it's job or not. Last i remember my 240 didnt have a post cat 02 sensor so i dont think that's your problem.

12-17-2003, 02:05 AM	#6
Var Post Whore! Join Date: Sep 2003 Location: Norcal Age: 43 Posts: 5,032 Trader Rating: (0)	A quick way to see if it is cat related is to check under the car for an 02 sensor. There is obviously one at the exhaust manifold (pre-cat) . If there is one after the cat(post-cat) then the MIL came on for a reason...that second 02 sensor is a catalyst effiency sensor. It senses if the cat is doing it's job or not. Last i remember my 240 didnt have a post cat 02 sensor so i dont think that's your problem. __________________ Hi