As I wrote failure was earlier more random (and without trip odometer and Cruise problems), and then more permanent. Failure was on before starting when I turned the key to postion II. I disconnected and connected the connectors in BCM and CEM couple of times (battery disconnected), checked alla the...

Battery may be apprx. 4 years. I have owned the car only year and half.

I have charged the battery anyway, so it seems to be fully loaded. But it may still be old and weak.

Late

Car is 2004 XC90 D5 AWD (automatic) and it has the warning, "brake failure, stop safely. This message has been there every now and then, but now it comes immediately when I start the car. Diagnostic codes most often been at the beginning 0074 (hydraulic valve, power cirquit) and then later one ...