New cats dead after less than 3k miles???

[Macro1]

About 2 1/2 years ago I put new cats in my '96 disco. I didn't buy the Y pipe direct fit, but did a Marc O. Weld in.

Well I have around 3k miles on them and I'm getting P0125 and P04020. (02 and a Cat).

What gives? Anyone else have bad experience with doing there cats this way?


BTW- had to make a trip to southern Utah to get my camper which blew a tire outside moab. I'm in a motel at the moment in town and no rover to wheel. Kind of sucks since it's been a couple years!

 

[p m]

P0125 should have nothing to do with cats. P0420 might. The PO of my green D1 replaced the Y-pipe with some cheap aftermarket version, and it throws 0420 every once in a blue moon (typically, when the driver lugs the engine instead of manually downshifting or using high range when low range is more appropriate).

Funny you should have mentioned it.
My green D1 at present has P0420 after being loaned to the same driver who always returns it to me with this code.
My white D1 this morning tossed a P0125 - which I normally disregard and clear since I know the CTS is okay. But I did some finger work, and this came up:

http://www.landroversonly.com/forums/f9/p0125-p1193-7703/

Apparently, 96s are prone to flip an erroneous code P0125, and there's a PROM fix for that (Part number - PRM9631).
Whoever heard of that, please chime in!

 

[AGH Sasquatch]

My 96 used to throw it all of the time. Usually after after running really hard...

 

[Macro1]

Thanks for the replies .

Come to think of it, I've have the PO125 before and topped off the coolant and it cleared it up. I will check the coolant level ASAP.

I would really hate to replace the cat again.