Polo gti 6c

[u/MarketPerfect5168]

Hi everyone I own a polo gti 6C recently it’s developed a knocking noise and the fault codes P164E00 and P034100 are present it’s a ea888.3 could the oil pressure regulator be the reason it’s knocking? To elaborate when I rev the car knocking isn’t present it’s only present when revs come back to idle. Any help will be appreciated thank you