I would put money on battery being the culprit, low batteries cause all sorts of strange issues.
I certainly wouldn’t trust Halfords diagnosis either as they are clueless.
Stick a decent AGM on it and I am sure it will be fine then

 

it does sound like the battery, certainly for a 2017 car if it's still on the original battery
Replacing it is a relatively cheap thing to try

 

Ok cool, can I change the battery myself or do I need someone to reprogram the change battery for me?

 

Go into the infotainment system and select car or settings, i did that myself without the need of an Auto electrician, don't close the boot lid if you disconnect the battery because you won't get the boot lid open, its electronic..fit a 95amp battery..

 

I don’t know about battery coding on Alfa, if it’s anything like Bmw like for like needs registering if different battery is fitted it needs coding. I would assume it will be the same on a giulia given it’s normally Bosch,denso etc that supply charging system parts

 

doesn't need any coding, just a reset after installing the new battery.
After battery replacement you will probably get christmass tree of lights on dash. To reset, described in the manual, but basic procedure is
switch on
turn steering fully left, hold approx 1 second
turn steering fully right, hold approx 1 sec
turn steeringwheel to centre, hold approx 1 sec
whole procedure should be finished within 30 seconds
repeat if necessary

 

....

So I have 2 questions;
1. Why is my battery not charging 100%?
2. Why am I getting the errors on the dash?

Any advice is welcome.

Regards
Kevin

1. The Giulia's 'intelligent' charging logic is designed to maintain the battery at an 80% State of Charge as measured by the Body Control Module (BCM). So your 80% reading is not necessarily a concern.
2. Nevertheless, the symptoms you are experiencing can often be caused by a failing battery. They might also be caused by a bad earth connection somewhere. Hopefully, not due to a faulty BCM due to water ingress.

My February 2017 Quadrifoglio was running happily on its original battery when I parted with it in August.
The simple solution is to fit a new battery and keep fingers crossed that the errors don't recur, but you might find the battery is not the cause and money will have been wasted. If changing the battery I'd recommend a 95AHr AGM one. It is slightly longer, but there a second fixing hole covered by tape.
Examination of the BCM for signs of water ingress might be a wise precaution.

 

Don’t fix the stop start, extra wear on the ring gear and, you will be doing effective cold starts if you stop for more than 45 seconds to a minute, on my MX5 I found a way to permanently disable it by removing a switch from the bonnet catch, maybe the same on your car. Mine wasn’t working most of the time anyway, then once in a while I would ‘stall‘ at the lights, then I realised it was working! Anyway I agree with others about the battery causing the stop start issue here.

The HRW can be checked by doing a continuity check with a multimeter on ‘diode mode’ so it beeps when you get continuity.

 

Also if you get continuity, check , the fuse, the switch, then if that doesn’t sort it. It’s a wiring issue.

 

Don’t fix the stop start, extra wear on the ring gear and, you will be doing effective cold starts if you stop for more than 45 seconds to a minute, on my MX5 I found a way to permanently disable it by removing a switch from the bonnet catch, maybe the same on your car. Mine wasn’t working most of the time anyway, then once in a while I would ‘stall‘ at the lights, then I realised it was working! Anyway I agree with others about the battery causing the stop start issue here.

The HRW can be checked by doing a continuity check with a multimeter on ‘diode mode’ so it beeps when you get continuity.

I have the Stuff4Cars gadget to permanently disable stop/start. Which I strongly recommend.
It is likely that my first Quadrifoglio's battery lasted 6+years because I always disabled S/S.

As far as the HRW is concerned, the BCM prevents the HRW working if it believes the battery SoC is below ~60%. An open circuit is not likely.

 

Battery first then see how you get on

I wouldn’t worry about the BCM at this stage if you've fixed the leak already

 

Thanks all for the advise! I will get a new battery and see how I get on from there.

 

I have a stelvio Quad and my stop/start, rear demister and heated wing mirrors didn't work. Had original AR varta battery on it, it's a 2019. Reading Stelvio and Giulia forums took a punt on a new AGM 95 019 batt, easy to fit, found a YouTube vid and sorted within 15 mins . Had all the errors when 1st turned on but went for a small drive, turned off and on all sorted. Only issue I had was the eml was on, this went off after a longer drive and the psi on all 4 tyres had sorted themselves.....

Hope this helps

 

my stop/ start warning symbol came on about 2 weeks ago and despite trickle charging the battery for 8 hours it's still showing and the HR Window did work okay for a few days, i get warnings about about lots of things like dirty windscreen and main beam etc but I ignore them as they do disappear, it's a Alfa design fault but my previous Alfa GT had zero electrical problems for the 8 years i owned it..beautiful car..

 

Update on this++

I put a new battery in it in October. I haven't had any warnings since, so it looks like the battery was the issue.

The start/stop still isn't working and the rear heated window isn't working either. I don't care about the start/stop but not having the rear heated window is a pain, especially with the snow and ice.

 

Most likely explanation of hrw not working is that the BCM is assessing the battery's state of charge as below 60%.
If you had multiecuscan, you could confirm if this is the cause.
What mileage do you do in a typical week?

 

I'm not doing much driving daily, but every other week I am doing 100mile drives to the outlaws house. I don't have a multiecusan unfortunately.

 

So I spoke too soon on this. Car was driving fine until I tried to drive to the shops today. The car wouldn't start and I got all the alerts on the screen as well as a "low battery". (Check transmission, esc fault etc) I am putting it on a charge now overnight and I am hoping that fixes it, but now I am totally worried this is going happen again when I need it most. I drove it 3 days ago and it was fine, so I'm not sure how the battery is flat.

Has anyone else experienced a flat battery like this?

I love this car, without a doubt my favourite car I have own. I thought I had fixed all these errors, but if the car isn't reliable enough to start for me I might have to get rid of it. The wife wanted to sell it because we had an issue with the Aircon, but now I don't have an argument if the car isn't starting.

 

I drove it 3 days ago and it was fine, so I'm not sure how the battery is flat.

Has anyone else experienced a flat battery like this?

I have experienced this as well. Twice for me. I would have started using a trickle charger overnight but unfortunately I didn't have access to power where the car is parked. I bought a couple of solar panels and a solar charge controller to act as a trickle charger during the day. Whilst it didn't cure the low state of charge (so the hrw and s/s still didn't work), the car never let me down again.

Eventually I fixed the battery drain problem by replacing the IBS (intelligent battery sensor) on the battery negative terminal. Now the car operates exactly as designed, HRW and S/S et al.

 

Many Giulia owners have had battery issues. Fortunately, only once in 7 years in my case.
There are numerous posts on the subject.
The most likely explanation is that there is some drain on the battery when the car is idle. There are posts giving possible causes.
You might benefit from getting a BM2 battery monitor.

 

So I tried the charge overnight and it didn't work, still loads of errors. I tried a jump and it didn't work, so therefore it couldn't be the battery. I called the AA and they came out. There were loads of "Unable to communicate to ECU" errors on all the components. My heart sank as I thought I needed a new ECU and my experience with the AA has not been great\succesful.

The engineer tested all the fuses and then started fiddling with the wiring loom. He found 3 broken cables in the main loom, they had worn away rubbing up against the air filter enclosure.

The engineer stripped it apart and soldered them together to get me going. Hats off to the guy he went the extra mile. He said he knew his guys probably wouldn't have attempted it and towed it to the dealer, but he wanted to help me out. He loved the car as well and said it was his first time dealing with one, so I think that helped me.

Very happy now, as I suspect the wiring has probably been causing me other issues and I didn't know it.

 

That's great news, the Stop/ start engine management light has just reappeared on Giulia again, I'm getting a bit fed up with my 2017 Giulia now as the Hrwindow has never worked properly and it never will unless I get a Auto electrician to have a look at it..i shouldn't have sold my Alfa GT.

 

I wouldn't panic. I honestly agree with @Andy Bowden that most of the time this can be due to the battery monitor going south although leakage and crap batteries can also be to blame. You'll be needing one of these.. it fixed it on my last car and I'm about to do surgery on this one. FIAT ALFA ROMEO 50548044 CONTROL UNIT

 

I wouldn't panic. I honestly agree with @Andy Bowden that most of the time this can be due to the battery monitor going south although leakage and crap batteries can also be to blame. You'll be needing one of these.. it fixed it on my last car and I'm about to do surgery on this one. FIAT ALFA ROMEO 50548044 CONTROL UNIT

My actual view is that mostly the issue is down to unwanted drain on the battery. Some have found that a faulty IBS is the cause. I believe few are in that category.

 

For what it's worth my current car seems to have a fine battery, no probs with leakage, the rear heated screen works nicely BUT start stop doesn't work. Although I have the electronics to turn off the stop start from my last car, they are not installed (it did work briefly at the beginning of my ownership), it seems to have settled in to a way of working that I am good with, I will take the car down to get my battery specialists to test it, not sure whether MES will give me a true idea of it's state.

 

Your stop/start issue is almost certainly because the BCM is assessing the battery's state of charge as below the threshold for stop/start operation, 70% if I recall. MES will tell you what the BCM's SoC measurement is.
There is probably nothing wrong with your battery, just the car's 'intelligent' charging logic combined with the mileage and type of journey you do, isn't keeping the SoC high enough for s/s operation.
But as you say, s/s is best disabled anyway.

 

I recently replaced my IBS sensor and all works fine now. After almost 3 years of HRW not nworking properly.
S/S will be getting a disable kit put on it now though.!!!

 

That sounds great, i took my Giulia into a Alfa "specialist" but they didn't have a clue how to rectify my Hrwindow and all they said was have a Auto electrician to look at it and charged me an hours Labour.

 

disconnecting the negative pole on the battery for 15 minutes or so will reset the IBS..... I would try that first, as it;s free
(disconnect the actual negative battery pole, not the quick release as the latter will not disconnect the IBS )
Upon reconnection you will need to perform the reset to kill the error lights : with engine running turn steering to extremes, then center. Turn off, restart, repeat if necessary

 

I had same issues; did replace several relays, did the software updates etc etc. Although the alfa specialist was pretty clear: couldn't be the battery; my common sense told me otherwise! Keeping track of the car usage, I discovered a undeniable pattern. When driving longer distances between (re-)starts never resulted in any issue; however (some) low mileage trips, multiple starts or driving in "A" mode with low rpm: issues were waiting to happen sooner or later.
After replacing and upgrading the battery, engine stalled only once. Fully charged the battery about 6 months ago, nothing to report since then!

 

2024 and battery testing by garages with dedicated equipment still seems to be unreliable. How many times has a battery wrongly been given the all clear in the forum. Stick to the amateur tried and tested methods.