Audi A1 2012 1.6tdi limp mode

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I have an issue with my 2012 1.6 tdi A1. The car is in permanent limp mode with the glow plug light flashing, EML on, as well as start stop not working. I believe the code is P0237 which points to the boost sensor. Is this the boost sensor or not (circled)? I did notice on the lower of the 3 pipes had a split at the end, I have shortened it and put it back on so has a good seal, cleared the fault but comes back as soon as the ignition is turned back on. A good google hunt said clean the MAP sensor but I have no idea where it’s located. Any ideas/help much appreciated if anyone has had experience of this issue before?