Hi all, I want to remove the turbo wastegate actuator as it is throwing up the P334B fault code and is in limp home mode.

My local Indie dealer said it should be a straightforward swap on my model. However, one thing I am unsure of is how many screws hold the heatshield in place, and whether they can all be accessed from the engine bay and not on a lift. The engine is the CBZB with the spark plugs at the front. I did try to undo one of the bolts on the top, but with no success, even after using penetrating spray.

If anyone has taken this part off or any recommendations, I'd be grateful.

Thanks,

John

I can't give you a definite screw count from memory, but a few things that might save you some grief before you fight that heat shield.

The Skoda workshop manual for the 1.2 TSI (63/77 kW) lists the turbo heat shields at just 10 Nm and says to start all the fixing screws by hand on refit. So they are small fixings that have been heat cycled for years. If the top one won't move, try it with the engine warm (not hot) and a good 6-point socket rather than leaning on it. A snapped fixing there is a much bigger job than the actuator.

Worth knowing too: in the factory manual the turbo with the charge pressure regulator (V465) and the exhaust manifold are only listed as replaceable together. Aftermarket actuators exist and plenty of people swap just the actuator, but that is why a main dealer will quote you a turbo.

On the code: P334B is Charge Pressure Control Actuator, Mechanical Malfunction. Before buying anything, unclip the rod from the wastegate arm and check the arm moves freely by hand through its full travel. If the arm itself is stiff or sticking, a new actuator on its own won't cure it.

Last thing, give Skoda UK your VIN and ask whether any open service action applies. Earlier 1.2 TSI Fabias had campaign 24W6 for this exact P334B / limp mode pattern (a 2 mm shim between actuator and turbo plus an ECU update). It may not cover a 2013 Yeti, but it costs nothing to ask and tells you whether a shim is already fitted.

Many thanks for the response.

I'm hoping it's not the turbo and only the actuator, as there are no other fault codes. I can move the rod side to side, but take the circlip off and give it a proper test.

I heard about the shim solution, but this one does not have one, just the body attached.

I checked with Skoda UK, and there are no recall campaigns for the car.

Workshop manual for Roomster with CBZB shows 6 fastenings (arrowed) for the heatshield, the two obvious ones on the top, two down the front, reachable from above but not super-easy.

Then there is one either side, ringed in pink and orange on this image. On our car the one in pink was absent, and may never have been fitted, the orange one is a bit awkward to access, maybe a bit upward-facing and hard to see from above, mirror on a stick will help locate it.

All either Torx Tx25 or Tx30, will check which shortly. All came undone reasonably easily on ours, but ensure Torx driver is fully engaged to the bottom of the recess, especially in any that have corrosion in there, before applying force.

You may well be able to get enough wriggle room without complete removal, which really needs oxygen sensor (5) out, and oil line (screw 4) detaching to achieve. Removing top alternator fixing and tilting it forward away from the heatshield is also suggested.

Hopefully releasing most of the screws will allow the actuator side of the heatshield to pull away far enough.

Tx30 for the tool.

All six are actually visible from above, with suitable head positioning, the front two aren't as low as I'd remembered, so easier.

Edited 7 hours ago7 hr by Breezy_Pete

Many thanks for that, very much appreciated. I'll give it a go in the next day or so 🤞