O2 sensor 16514 fault code

[mikeyquattro]

Hi all.
Changed the O2 sensor on my son's 1.4 akk engine Polo and the fault code has returned. O2 sensor reading on vcds goes to 25% and then 0 (as fault code returns)

Any thoughts on what could be causing the car to throw this code?

Sent from my SM-G930F using Tapatalk

[937carrera]

Check the wires to the multiplug to the right of the exhaust (looking from the front)

The wires and pins corrode and cause lots of problems, from memory