Tyre pressure monitors

[Jon8710]

Hi Chaps

Iv recently been running a square set up on my car for a few month and thought while the OEM wheels were of I thought it would be a good time to give them a full re-furb from lepsons "who did a fantastic job by the way"

I have just got round to putting them on this week and after about 15miles I'm getting the flat tyre tell tell light come up on the dash, I have tried to reset it a few times but It keeps coming back!!

I have also fitted wheel spacers to the car when putting the wheels on and I don't know if this will have any affect on anything?

all the pressures are ok

any help would be appreciated

cheers