You don't say what year the car is and whether it has a Security Gateway (SGW). Giulia's built since 2018 have SGW's.

MES will allow you to attempt reset of error codes in a car without an SGW or if you use an SGW by-pass.
MES will allow to you to determine whether the errors are historic or permanent.

Errors like the comms error ones are quite common as transients.

Perhaps you have only historic errors which MES will let you reset. Or permanent ones which it cannot.

If you're really lucky, all the error codes can be cleared or more likely most will be cleared, but a few will remain. Any that remain will give you a clear indication of the root cause of your problems.

Good luck.

 

The car is from 2018 and I have SGW bypass installed so all good there.

i tried to see if I could clear the errors but I could not.

 

After changing a battery you can expect lots of warnings. Have you tried full steering lock left then right and 5 re starts ?
That will often clear alot of spurious faults.

 

The problem did not pop up after the battery change

 

When I changed my alfa romeo giulietta battery I had plenty of lights on dashboard, so it needs to go ignition on then all steering wheel one side then all another side then again the other side and then put straight. Turn off wait couple mins then on again and it will be no any dashboard lights on.It worked on my 2014 Giulietta. Worth to check youtube as I dont remember which side steering wheel should go first 🙈 Hope that also will help to your Giulia.

 

I think you misunderstood me.
I changed the battery because of the errors came up and I thought that it could possibly be the battery so I changed it but the errors did not go.

 

If the errors occurred after washing the car check the fuse box in the passenger footwell and BCM for any signs of moisture. Water may have entered via the fresh air intake if your drain is blocked.

 

If MES can't clear this large number of errors because they are permanent, there must be a common cause.
The only common thread seems to be comms failures and implausible or erratic signals.

You mentioned the problem arose after washing the car. There have been several instances of water ingress into cable harnesses. One possible explanation is that water ingress is preventing effecting CANBUS communication.

As @Mctga says, check for water in the passenger footwell and BCM.

 

...
B100C-92 - Rear left taillights - Performance or incorrect operation
...

this is your problem. either water damage to BCM or tail light after wash.

 

But the lights work as well without any signs of problems🤷🏻‍♂️

 

Honestly when it comes to the Giulia, take your pick on 100s of causes for random error messages/lights.

Being an older car (which were susceptible to water ingress) I would definitely check that out.

But there has been other causes of these errors such as faulty wheel speed sensors. I had an issue on my '21 Veloce Ti which cames from a faulty seat belt stalk sensor.

 

Bad/corroded earth? I had one which I think was directly under a "drain route" from the driver side windscreen scuttle. I say "think" because the fixing dealer didn't say where it was, but I spotted it when doing an oil change. You have to take the engine under tray off. There's also another earth behind the arch liner near the relays.

 

Hi there i have check running light check reverse light and check stop light warning all at same time after instaling camera on a gulietta does anyone know why all lights are working fine

 

Try posting in the Giulietta forum.

 

Did you get to the bottom of this? I’ve had these three lights come up the last few days?
Forward collision warning
Check stop light
Check parking light.
Giulia veloce 2020

 

Turned out to be a lose connection to the rear right parking like used and launch diagnostic tool to see the code then traced to back to there

 

So if I head to my garage what should I say needs done?