P0298

[JamesW383]

Good evening,

This is my first time using a forum, and I'm new to the Ram game.

A week after I bought myb05 Ram 1500 it gave me the code for catalytic converter low efficiency bank 2. I changed all 02 sensors, just because. When i got to the last one, the down stream on the passenger side, the hole was stripped and the 02 sensor fell off in my hand. I had that section of pipe fixed, and it still gave me the code again. So I did the non fouler trick, and I haven't gotten the catalytic converter low efficiency code for 2 weeks. (Over 300 miles) but now it's giving me the p0298 just the last few days. Maybe a exhaust leak in the new pipe that was welded on before down stream 02?
Any help would be appreciated
Cheers

 

[Mister Luck]

Could you tell if the cat has been compromised (besides the rotten b*u*n*g) or gutted?

if you haven’t already done the following

Check your radiator with a pressure test see if it holds.

Preform a cylinder leak down test and just a plain compression test.

If you’re getting any coolant or too much water vapor into the exhaust system from condensation, water, snow or maybe it sat in a snow bank previously you could just have a bad cat that’s deteriorating, or carbon build up clogging it.

You want to find the reason before you try to replace any parts

It’s a guesstimate to what the vehicle history was before you bought it.

Is the cat original that you can tell or compared to a similar vehicle is it welded in or flanged in with bolts ?

 

[JamesW383]

The cat seems to be in good shape, no external damage. I'm going to put a camera down the up stream 02 hole today.

I haven't done a pressure test on the coolant side or leak down test, but I will soon.

The cat is original.

Ill let you know what I find
Thanks

 

[JamesW383]

Late update. Ended up being a crack in the section of exhaust just after the cat. Patched it up, no code.