BST/GMT clock shift

[Gambit]

Heres one thats got me stumped.

just changed clock from BST To GMT ie back one hour.

It does change and imediatly after turn ignition off then back on its still saying the correct time.

Drive about 500 mts stop put car in neutral and clock has changed back to BST time -ie it has increased by one hour.

Is the clock fed from the BSI module.

The car is a C3 mk 2 2015 1.6 Hdi 100 blue.

Im going to try BSI reset later

[RichardW]

Does it have a Daylight saving option, and / or a time zone option? If so, you need to set it via here, not by actually adjusting the time.

[Gambit]

Hi have done what I have done for last 10 years.
If you set it and hit confirm and then confirm again, it changes when the minute changes trying to change it by 2 hrs still results in it going back to BST figure you started with
Ive also got a problem with the front parking sensors which are fed from the BSI unit.
This area was disturbed when the air bag recall was done, so its a funny coincidence?

[Paul-R]

How old is the battery?

[RichardW]

Possible they had the battery off when they did the work, and this has re-set some option that was previously turned off.

[Gambit]

The battery is about 4 years old, but the diagnostic test says its fine

The battery was disconnected when they did the air bag work, I watched them disconnect/reconnect without any reseting BSI

[Gambit]

Just to conclude this subject.
I did a BSI reset and it cured the problem.