Tdi alh 2002 boost problems

[Nico payant]

hi everyone I wanted to know if you have ever had this problem when the outside temperature is hot around 30-40 degrees Celsius I have no boost at low rpm and unlike when the temperature is cool 20 degrees Celsius and less it boosts wonderfully everything works great what issue possible?

 

[Curious Chris]

Do you own VCDS? You can log data with it. You say no boost but it could be the MAF has a no CEL failure and is not allowing the boost.