It is booked in with a LR indy tomorrow, just wanted to check ahead of time. Current MOT station told me it wasn't going to pass either way if it had no cats

Is this the right set of cats for a 1999 Thor?: https://www.dieselparticulatefilters2u.co.uk/land-rover/7009-land-rover-range-rover-46-01-97-02-01-catalytic-converter-bm90737.html

That's good to know. I'm back at square one then - assuming the MOT station won't fail it for missing cats, what's the usual process of diagnosing high emissions? I'm going to have them check the voltages on the O2 sensors today to see if they're reasonable.

Is it possible to pass the emissions test without the cats?

Failed on emissions I believe, no mention of cats in the results: Exhaust carbon monoxide content after 2nd fast idle exceeds default limits (8.2.1.2 (b)) Exhaust Lambda reading after 2nd fast idle outside specified limits (8.2.1.2 (c)) Exhaust carbon monoxide content at idle exceeds default...

Thanks , I'll take a look. Here are the pictures, does this support what they're telling me?

Just been to the garage - they reckon the cats have been cut out and replaced with straight pipes. Pictures to follow later. If that's the case - please do share where I can get some replacement ones. Should the O2 sensors be pre-cat or post-cat?

Haven't heard back from the garage today (despite telling me they'd ring - classic). There's another garage a bit further which has all the LR diagnostic equipment, so I've booked it in with them later this week. Hopefully all will become clear then. Thanks, wasn't sure about this - got lots of...

It's at the station right now so I can't take a look yet - I did mention the lambda sensors, but they said they were '100% confident' the cats are at fault. They said they would have to change all 4 lambda sensors to be able to rule that out, and I'd be looking at 4-500 quid to give that a try...

MOT station has just rang - they reckon there could be an issue with the cats. Said they sounded hollow when they tapped them. Is there a quick way to diagnose this?

I've got an OBD reader but it's one of the cheapy/generic ones, what values should I be comparing with? O2 sens voltage?

Morning, Just took mine in for an MOT. It failed on suspension wear and emissions: Exhaust carbon monoxide content after 2nd fast idle exceeds default limits (8.2.1.2 (b)) Exhaust Lambda reading after 2nd fast idle outside specified limits (8.2.1.2 (c)) Exhaust carbon monoxide content at idle...

Thanks! Been out today and drove about 20 miles total, all seems to be good so far. I did smell some burning from under the bonnet, maybe because the heat shields are off? I tried to check the coolant level when I got home, but now my bonnet won't open 😑 only pops on the passenger side!

Unrelated question, but does anyone know what this connector is for? Been hanging disconnected since I got the rover. Driver side of the boot lining.

Top hose was cold and squishy this morning. No obvious leaks either, so fingers crossed. Next issue is why my battery doesn't last more than a few hours, but I'll save that for another thread