Clock changes time to 01:00 without warning

[CSPgodzilla]

The clock changes it's time to 01:00, without any warning

The car went for a fluids renovation.
Got some new oil sensor.

Now it changes time with no warning what so ever, to 01:00.

Has it happened to anyone?
What Did you do?

[PeteG40]

mine does this when left a long time - i think its an old battery

[CSPgodzilla]

Mine does it three to four times in a 50 km drive.

[hayesey]

hmm, this plus your lights not working, I think you've got a problem with the wiring to the back of the dash pod. Take it out and have a look at the wiring. Are there any other issues with it? warning lights coming on, rev counter stopping working etc...?

[CSPgodzilla]

No. I think something more extensive is the basis.
My battery drains 25% in 8h at night