code P0420 2007 9-3t

[9-3 Aero]

Could be, as air/fuel ratio and lean/rich fuel mixtures are parts of how the cat. works, but then only time will tell.

- If so wicj cat is the code for?

- And: The reply is without I see where you are living (different countries = different setups), and the engine in question the 2.0T.

As the catalytic converter configuration is engine dependent, and we still don't know what engine is in question, am I not in position to give a creditable reply to the question.

[ronald1980]

2.0 turbo 210 hp engine 207r

[9-3 Aero]

I just read the top of your post. So it is the one were the sencers screw in and is between the firewall and engine bolted by turbo at the top of the diagram that big section of pipe that goes down to a bend and on back.

Affirmative, however is the catalytic converter as a piece part, the one on top of the pipe, from the flange where the bracket attach to.

[ronald1980]

Can I hollow out the cat and put them back on to see if this is the problem before I spend a lot of money?

[9-3 Aero]

Not a good idea, as the principle for the fault criteria is the ability of the catalytic converter to store oxygen, i.e. no "entrails" = no storing.

About the bad gas filled i Ohio: Any chance that it could contain traces of lead, this as lead is destroying the active elements of the cat.? The question raised as my understanding is that the fault code raised (right / some time) after the gas filling.

[simpleaz]

I would seek a tuneup or further testing. Could be just fuel or timing problems causing rich ratio and polluting the sensor. Tune up may resolve issues. Now the modern car minimizes these issues but may be no need to touch o2 sensors or replace cat.