2005 Polo GTI makes a loud whining sound on cold start - video supplied
Hi all,
Fairly new here so forgive me for any mistakes I may make. I have been having an issue where on start up, my Polo makes this horrific whining noise (see attached video). Doing some research online, some suggest it may have to do with the secondary air pump and I think from memory the mechanic said it was the air pump for the catalytic converter (though didn't go into much more detail than that).
It generally happens when starting from cold and will shut off after approximately 30 - 45 seconds, then will spin up again a minute or 2 later for another 15 seconds.
Is this a common issue, what is going wrong with this?
Attached Video
Thanks in advance for any help!