New battery

[Tom Sawyer]

I keep mine connected permanently, did the same for 10 years on the TVRs, never an issue!

[Andyp123]

Hi all charge is done took 8hrs in total to do the recon charge. I’m still getting the bloody error code on the dash ( SoS limit functionality) I’ve replaced the battery to the actual unit that didn’t fix it. I’ve now done a full recon charge still have the error code! I get the error code come up very intermittently. Any ideas! Could it be anything to do with the SIM card? I brought the car second hand so I’ve got no idea what the cards for? Or will it need the module unit replacing? It really doing my head in!

[scm]

I'd drive the car a bit and see if the error disappears - it may take a while for things to sort themselves out, the TCU battery may need a bit of a charge. If that doesn't work, you could need a new TCU battery - I've recently replaced mine to fix what I thought was causing dodgy Remote app behaviour, but it seems that fault was at Jaguar's end. Easy to replace the TCU battery (even I managed to do it!) if you have to, although I'd have thought it should last more than 5 years (mine was over 7 and I think it was actually still okay).

Nothing to do with the SIM card.

Edit: Doh! Just seen you've replaced the TCU battery? MIne was rather low voltage when I got it so it took a few long drives (1 hourish) to get it fully recharged.

[Andyp123]

Hi scm I’ll drive it for a couple of days see what happens fingers crossed the bloody error goes away it’s playing havoc with my OCD

[scm]

Hi scm I’ll drive it for a couple of days see what happens fingers crossed the bloody error goes away it’s playing havoc with my OCD

I know the feeling!

[Pilot Pete]

Mine is now 7 years old and still going strong (hope I haven't jinxed it!). I do periodically put a CTEK on it to keep it topped up. For replacements, I'd go for a Varta from Tayna, using the discount code from Number 27's YouTube channel. https://www.tayna.co.uk/car-batteries/varta/a5/

It'd be cheaper to get a CTEK (or similar) battery maintainer and give your existing one a new lease of life!

I bought one and a code reader/ diagnostic tool to program the battery to the car. Cheaper than getting my Indy to supply and fit a battery! Now I have the reader for other fault finding purposes. Oh and I will be able to do the same tactic when replacing the wife’s XF battery which will be due soon (same battery incidentally).

[Andyp123]

Don’t want to put the mockers on it but since brought my CTEK and done a recon charge my SOS limited functionality has gone from the dash. Funny thing was I replaced the module battery installed it before I charge the battery an for the next 2 days I still had the message coming up SOS limited functionality. When I parked up and turned the car off I could hear like a small fan noise coming from where the module was no idea what this was but the sos on the dash has now gone fingers crossed.

[Andyp123]

Driving for a week no Sos fault on the dash after a CTEK full charge. Tonight driving home sos fault is back I’m. Only had the car 2 months so might go back to the garage it’s under warranty for 6 months.

[rtmyers1]

I'm having this same problem... Installed new telematics battery in my 2019 and message went away for a month, but now back intermittently... I do see in the Jaguar TSB on this subject that you are supposed to use the Jaguar diagnostic equipment to reset the telematics to know it has a new battery... Going to ask my dealer to do this at the next oil change...

[Andyp123]

I thought you hold down the little spanner by the mirror at first it lashes fast then when it flashes slow it’s reset