2015 Vauxhall Vivaro 2014 vivaro 1.6 cdti intermittent cut out while driving,no warning lights coming on dash but dash lights and gauges all go out for split second then fires back up again.

Quite a lot of instrument cluster faults on that vehicle , here is an example

https://www.clusterrepairsuk.co.uk/repair/model/vauxhall-vivaro-instrument-cluster-speedo-repair-service-face-lift

https://www.revtronic.com/product/vauxhall-vivaro-instrument-cluster-repair-for-lcd/

Think it more electrical fault as engine cuts out plus dash for split second intermittently while driving possible loose connection somewhere

Check any plug / connections behind instrument cluster if you suspect that and check the fuses

Vauxhall Vivaro (2014 – 2016) – fuse box diagram
Year of production: 2014, 2015, 2016

Instrument panel fuse box
Opel Vivaro II - bezpieczniki - deska rozdzielcza
Vauxhall Vivaro II – fuse box – instrument panel
The fuse box is located on the lefthand side of the instrument panel, behind a trim panel. Pull upper part of trim panel and remove to access the fuse box. Do not store any objects behind this panel. Some circuits may be protected by several fuses

Number Circuit
1 Vehicle battery (with electronic key system)
2 APC battery backup (with electronic key system
3 Heating and ventilation system
4 Adaptations
5 Adaptations
6 Heating and ventilation system
7 Additional heating and ventilation, air conditioning system
8 Supplementary heating and ventilation system
9 Electric exterior mirrors, additional adaptations
10 Heated exterior mirrors
11 Radio, multimedia, electric exterior mirrors, diagnostic socket
12 Multimedia, trailer hitch
13 Courtesy lights, battery discharge protection
14 Fuel injection system, tyre pressure monitoring system, electronic key system
15 Hazard warning flashers, turn and lane-change signals
16 Central locking
17 Left-hand high beam, right-hand low beam, tail lights, left-hand daytime running light
18 Front fog lights, rear fog lights, number plate lighting
19 Alarm, horn, lighting, wiper
20 Instrument cluster
21 Light switch
22 Rear window wiper, windscreen washer pump, horn
23 APC general battery
24 Reversing lights
25 Brake switch
26 Fuel injection, starter
27 Airbag, steering column lock
28 Passenger power window
29 Power steering
30 Brake lights
31 APC battery backup (with electronic key system)
32 Service display
33 Cigarette lighter, power outlet
34 Right-hand high beam, lefthand low beam, sidelights, right-hand daytime running light
35 Brake lights, ABS, immobiliser
36 Interior lighting, air conditioning
37 Starting with electronic key system
38 Rear window wiper
39 Warning chimes
40 Load compartment power outlet
41 Driver power window
42 Rear power outlet
43 Starting, body control module
44 Heated seats
45 Heating, air conditioning
46 Windscreen wiper
47 Tachograph
WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.

Did you solve this, having similar issues

This was posted on Nov 23, 2022 (5 months ago) and no update since then

Well if I solve mine I'll be sure to post a reply, does my head in when we never see a result ?

Did you solve this . I'm also having similar problem

No update since last post

Has anyone solved this?

Not yet

Has yours been into Vauxhall at all? What parts have you replaced? If any?

Not my problem / car , other members as per posts