Hello. I'm having problem with my 2018 Skoda Kodiaq 4x4 190 dsg.

It's putting on the glow plug light yellow & flashing then the car looses power. It usually occurs when l leave for work first thing in the day & head off up a hill. Not to steep but enough to drive the car a bit. It's a country road 60mph. Doesn't happen if l go in the opposite direction, down hill with car driving easier & once things gets warmed up no problems. I've had it at a garage & they diagnosed the egr & Nox sensor showing faults. I had the egr replaced & adaptions done but still problem occurred. They then replaced the exhaust high temp (dpf sensor) around back of engine drivers side but still problem. They've now replaced the intercooler as they though it was becoming restricted with carbon build up but still hasn't sorted the problem. 84k miles on the car. They've not mentioned any further issues with the Nox sensor as said at the beginning the egr could be giving it a faulse reading. It's also very costly just to replace if there's no clear indication it a problem. Wondering if anyone on here had experienced similar problems with there car. Oh I've also replaced the battery so have now spent a considerable amount of dosh & still no fix.

Given you’ve had the egr replaced and the dpf, even though does seem similar in symptoms to that failing…

Does that engine have an N75 equivalent? Ie the boost actuator solenoid. Sounds to me like cold running is causing the turbo to not spool up. And it’s being chucked into limp mode. Thus it’s okay going down the hill as there is a lot less load on the engine.