[GrahamBrown1]

I think you will have to visit your Volvo specialist again if you have no way of reading the cars fault codes. I can’t see it being a tyre fitment issues especially as you have had 4 fitted which I assume will be all the same make and model so you should have no issues there.

Depending on which tyre pressure monitoring system the car has, the newer models use indirect tpms where there is no pressure sensor in wheel. It uses the ABS to monitor the wheel speed and from that work out the pressure. Direct has physical sensors in each wheel to read the pressure. The fact you have both ABS and TPMS faults would suggest to me the car is on the indirect system.

I would find the tyre pressure sticker normally in the drivers door pillar and ensure all the tyres are inflated correctly. I would try and reset the tpms and take the car for a drive. If the ABS then starts to see what it wants it might clear itself. Tyre garages often over inflate tyres to seat them and I always find I have to go round and adjust pressures afterwards.

That’s what I would do if I had no access to any diagnostic equipment. A local garage might have a suitable tool just to clear the lights off for you or maybe even read the codes once you know the tyres are correct to save you such a long trip.