Faulty Throttle Body??

Wondering if anyone has any advice? Freelander 2, no power when pulling away and when accellerating i can feel the drag. Other symptoms are shuddering when turning the engine off.
I was driving on the motorway with foot to the floor, 3000rpm but could only get upto 50mph.
Recently had a new reconditioned engine and battery. So trying to avoid spending more than necessary.

Diagnostic test brought up 3 codes..
PO238
PO2E0
PO2E1

After researching I can see that the last 2 are the throttle body, but worried about the first one. As that could be the turbo actuator? But no other codes Associate with this.

Garage plans to do a smoke tests followed by further tests, but cant fit the car in until next week. But I have a 4 hour round trip on Sunday!!!
I have a mobile mechanic that can fit a new throttle body this week, he will do a smoke test first to check for leaks.

My concern is that if the smoke test shows nothing, and then I pay for the throttle body to be changed, it may not actually be the throttle body?

The garage that it is booked in next week have said that it could anything from an air leak to the turbo, but surely the turbo would have throw a few more faults?

Anyone been in situation or have any advice? I don't really feel like a 4 hr round trip in limp mode.

FYI, I have no clue about cars, and this has all been found on Google. I just don't want to be taken advantage of

Check your boost pipes… may have a split in one

I'd check the boost hoses first, as they're known to fail. I've replaced all 3 replaceable hoses with silicone replacements. The throttle body is easy to check for damage. You simply need to remove the boost hose from it and try moving the butterfly valve by hand. It should move smoothly through its full range of motion. If it's sticky or notchy, then it'll need repairing or replacing.
The turbo vanes are also known to stick. There's even an LR procedure to free them. The instructions for that are in the manual.
The turbo on these engines is very reliable, often lasting 200k + miles.

Don't rule out checking the MAP sensor, maybe remove it a give it a clean with contact cleaner, but hoses that have been suggested should be checked also.

I was interested to read this as my 2010 Freelander 2 broke down last weekend (no power and cutting out). AA came and attached their diagnostic machine and it came up with an EGR fault. Managed to get it to my local garage and they agreed that was the issue. Replaced but now a new problem, it's still running, as they put it "rough". Came up with a throttle valve issue, unplugged it tested and took for a long blast down the dual carriageway, ran sweet as a nut, plugged the throttle valve back in and rough as rats again. I am guessing that I need to a) get the valve inspected and cleaned in the first instance, and b) replace it in due course? In the meantime, is it safe to run the car with the valve unplugged or will it cause more damage, (basically I need to save pennies up to get the job done).

Mine did need a new throttle body. I was told that I was ok to drive it for a week whilst waiting. But I daren't drive it a long distance or on the motorway. New throttle body fitted and I now have power again. Fingers crossed that's it for a while now. However, Mine didn't break down, it just have no power behind it, I was on the motorway when it started, foot to the floor at 3000 revs and couldn't get above 50mph.