Dodgy timekeeping

[Fig]

My car all of a sudden refuses to keep the correct time. Every time I get in it it loses about 20 mins. But the other day it actually jumped back 10 mins while I was driving. Any ideas what’s going on..?

The car went in for a new timing kit recently, and I assume they disconnected the battery, but that’s about the time the bad timekeeping started. Any help gratefully received.

 

[Kerr]

Did you go above 88mph?

 

[Fig]

Did I!

 

[DKZ5745]

How old is the battery? Failing batteries have been known to throw up all kind of weird & wonderful electrical issues.

Also, water ingress into the boot lock has also been known to affect other systems in the car.

 

[Fig]

Yes, maybe I should do that. I don’t know how long it’s been in the car.