ABS and SERV lights on!

So I took the van out for its weekly circuit around the block today and the ABS and SERV lights came on. I pulled over and switched on/off etc to see would it re-set but still on! any suggestions? Thanks in advance! It's a Renault Master base btw with regular service history etc

I'm sure I'd be like a donkey looking into a ditch! I have a phone number of a mechanic who is local enough so that's a job for Monday. Time will tell. Thanks for that

So it was the rear right ABS sensor, replaced today and all good! Renault...so much better than BMW !!! I've a 2003 R1150RS and the ABS issues on those bikes beggar belief. Mine has had the by-pass and thankfully I haven't tested its absence since. In an around that year BMW ''improved'' their ABS systems with disastrous results. I've heard the ABS on the earlier K models was/is bullet proof...life is strange (is ait an mac an saol!!!)