Freelander 1.8 2004 Facelift New Purchase Issues

Hey and happy to be here and see such a community!

I'm from Romania, recently bought a Freelander 1 2004 1.8 petrol (was my childhood dream car) i invested in it already around 1000$ in most of the mechanical parts the ground link ones, and now i am checking the engine, fiscally it runs with ac on it fluctuates a bit at idle, and rand a diagnostics and got the following :
p0480
p0340
p0420
p0170
To not spend a fortune i am reaching out if maybe someone can point me in the right direction, issues might be linked or individual, and any idea is welcomed. Thank you in advance!

Welcome to the forum.

I know some people say don't clear the fault codes, but have you cleared them to see which ones come back? Some may be historic.

That is the first thing on the list will do today.

If you read the text the faults state "not currently present" so they are not faults now.

The only one that does not have this is
P0480 Which shows on every 1.8 petrol I have ever seen !!!

They do hunt a bit when there is a head gasket issue looming. Do a compression test of all 4 cylinders and check for oil in cooling system.

Welllll head gasked was changed before this scan, we deleted codes, waiting for service to take it on a run and scan again.

Clearing codes on the FL1 isn't an issue, as T4 and general code readers aren't looking for past code history.
Later LRs that use SDD as the official LR diag tool shouldn't have codes cleared, as all history is lost. That's not an issue here however.