joaofpo

I'm using VCDS also so I'll try to get the sensors and replace them. Thanks for replying and for the original post!

Hi rbhelle, I have exactly same issue (but on my Yeti), all 4 sensors are reading a too high temperature. Did replacing them fixed the issue?

Hi Greg, After driving the car more than 150 miles, it seems that the issue is gone. I get no Engine or EPC warning lights on the dashboard and no Error Codes when I plug the car scanner (I mean, there are some codes, but I believe they are related to other issues). I cannot thank you enough for your messages and photos. I couldn't have fixed it without you. Also, thank you @Breezy_Pete for your tips related to the linkage. Juan

Hi Greg, I got the P155A code again after a few miles, so I decided to take the actuator off and do some measurements. Mine has a rod 2 cm longer than yours (again, your pictures are a huuuuge help). I also inspected the waste gate linkage after Pete suggestion, but mine looks good, with no gaps. What I did see is that with my current actuator, the waste gate is never proper closed (or opened, not sure as I can't see inside the turbo). I measured the distance between its position with the actuator and the ideal "closed" position and it's exactly 2 cm. I'm confident that the issue is due to the size of the actuator rod. The garage I bought the car from probably installed the current rod, without regarding measurements. I proceed then to install washers between the actuator and the turbo and I could get as much as 1 cm and I ran another 'Initial Adaptation of Charge-Air Pressure Actuator'. The car felt much more powerful than with just the shim, but after a 50 miles, I got the error back. I've searched for an actuator and used the same part number as the one in your photos, since I believe our cars are similar. I wasn't sure I was getting the right one, because on ebay, the measurements advertised were always longer than yours, so I decided to buy one as close as yours. I've received it last Saturday and it's exactly the same size as your actuator. I've installed it, but didn't test it properly yet, because I want to replace the oil separator first, as the car is leaking oil. I'll keep this thread updated. 😊

@Breezy_Pete Thanks a lot for this. I'll definitely check the linkage.

Greg, What a fantastic answer! In my case, I bought my 2010 Yeti 1.2 TSI (like yours) from a small dealer that didn't know what to do with it as the poor car was neglected for too long. I was constantly getting the EPC light on with P334B error (Charge air pressure actuator-mechanical malfunction). I could see though that the actuator looked brand new so I understood that they tried to solve this issue, but failed. I've tried the following: 1- "turn on, turn off" 15 times, but the EPC light kept coming. FAIL 2- Install the shim between the actuator and the turbo, did the "turn on, turn off" 15 times, but after 25 miles, I got the engine light with the error codes P155A, U1113 and P334B. FAIL 3- I've bought the VCDS cable and tried to run the 'Initial Adaptation of Charge-Air Pressure Actuator', without the shim, but I kept getting an 'Aborted Safety Reasons'. FAIL 4- I've installed the shim once more and successfully ran the 'Initial Adaptation of Charge-Air Pressure Actuator' with VCDS; no lights on dashboard or error codes after 30 miles, but I need to drive it a lot more before I can say that the issue is fixed. It's my first time driving a 1.2 TSI and I find it a little bit under powered... maybe it's just because I'm comparing it with the other cars I have. I'll see how the car handles. Fingers crossed the issue is gone for good. Thanks a lot for taking the time to reply to my question! Juan

Hi Greg, Was the issue fixed? I'm having the same issue as you. Regards Juan