All power cut out

[Green66]

Hello,
This is my 1st visit to the forum although a very good friend was and my all knowing volvo sage but sadly no longer with us.
I have a 04 v70 and on three occasions with a gap of two/three months in between as I am slowing down at a roundabout or junction the power goes and I have to put it into P turn off the ignition and restart which it does fine but its a bit disconcerting!
I have taken it to MRG and they said the computer was fine and did not know what it could be?
Thanks for any help.

[LiamT4]

Does the car have an aftermarket alarm/immobiliser fitted?

Maybe a job for a specialist auto electrician, but as the problem rarely happens it could be difficult to diagnose.

[M-R-P]

Might be worth resetting the ECU/ecm, unplug the battery for a few hours (you need the radio code if you have the original stereo in it) This can often sort minor problems.

:welcome:

:)

[Santa]

Also slightly dodgy car battery can play havoc with these cars. (Had weird issues in the past). If your batteries getting on a bit it may be worth getting it checked and even proactively replacing.

[Niles]

and check/clean all the earth straps, battery terminals etc etc.