Vw polo blue gt o2 sensor post cat issues

[Blu eyz]

Hi I have vw polo blue gt 150ps 64 plate.

I keep getting engine light come on telling me the o2 sensor post cat is stuck/lean and or low voltage.
Error codes P2270, P0137, P0141.
Does anyone know the part number for post cat o2/lambda sensor as dealer is charging £218. If anyone has any advice on what to do, I've changed the o2 sensor once already so not sure if I need a genuine dealer part. All wiring has been tested too and is fine.
Thanks

[Toymachine1]

I have had both lambda sensors changed on my 1.2TSI CBZB Polo. Only way to fix properly was to install genuine sensors.

[Le_Combattant]

Hi I have vw polo blue gt 150ps 64 plate.

I keep getting engine light come on telling me the o2 sensor post cat is stuck/lean and or low voltage.
Error codes P2270, P0137, P0141.
Does anyone know the part number for post cat o2/lambda sensor as dealer is charging £218. If anyone has any advice on what to do, I've changed the o2 sensor once already so not sure if I need a genuine dealer part. All wiring has been tested too and is fine.
Thanks

For 0² sensor: go for genuine ONLY.

Otherwise, it's the best way to have trouble

[Blu eyz]

Thanks for the responses, I disconnected both o2 sensors and ran the car then reconnected them and so far no error codes. If one pops up I will just buy genuine part