I'm currently downloading the 2010 XF service manual from TOPix, and the one thing I keep seeing is that all of the XF's control modules go almost directly to the batt. Other interesting tid bits↓↓↓
There are 31 volumes of DTC faults
The car can tell you what ails it without the turning of a wrench.
We all need to be very friendly with our Jag service writers (I just gave mine a case of Stella Artois..LOL)
It has many Ford parts!

 

You post this 24 hours after my battery died due to this 0 degree weather in Ohio. IMO the battery is undersized for all the electronics in this beast!

 

Hahaha, I bribe my local Jaguar service writers and mechanics with free gun accessories, lol. They are always happy to see me come in.

 

I have been advocating a better battery for a long time…..people just don't seem to get it. There are only two batteries that I know of that do the job, one from Sears (Diehard Gold something or other) and one from Autozone(?) called Duralast ….both having 170 RESERVE CAPACITY (THIS IS CRITICAL) . After I switched, my intermittent and crazy problems disappeared ……..not a single showing of the "low battery message" appearing on the dash screen that came up often, for a few seconds , especially when starting up.

 

Yep there is something not quite right with the battery. I like the fact it warns you it is going to turn the car when you do not have the engine on. Interesting and useful little warning. Although one morning I had all the doors open loading up the car - without the engine on and it went flat - it was cold. My Samsung refrigerator makes a beep when you leave the doors open too long.

 

I actually put in a Die Hard gold after getting the "Batt Low" warning 1 time with the Jag batt right after getting the car. This car really needs 2 battery's..lol, Their is also a Lithium (Braille) choice in Batteries for our cars but it's $1500.00 but super light. Sears also has a 2 amp automatic trickle charger for like $30 that has all the attachments for a plugin to be installed that eliminates the need to lift up the trunk batt storage flap every time you put the charger on. If mine is going to sit for more than 2 days, I plug it in.

 

I keep mine on a Battery Tender if not used for a few days!

 

Try an odyssey battery. I switched to this in my truck cause with everything I have in that I had issues with batteries. I plan on switching the jag out with this as well once mine dies. I think they even have up
To a 4 year warranty if not mistaken

 

I've heard raves about odyssey batteries but they are pricey, close to $400 for our cars. I just picked up an agm type yesterday from batteries plus, can't remember the brand but it was $200, with a bit more cca than the odyssey, but i think the odyssey is dry cell which is better for running equipment with the car off.

 

I believe they sell Duracell (yes, like the regular AA battery).

 

At the risk of repeating myself, I am stating that the CCA is important but the RESERVE CAPACITY is more so !!

 

In a sense, I'm glad to hear that I'm not the only one getting the dreaded "battery low, start car" message. It happened to me last December (2013), and I replaced the battery right away. My wife went out yesterday, to run a couple of short errands, then parked the car. I went out a while later, just to move the car, and as soon as I opened the door, the message popped up again.


I worked for Advance Auto Parts for a few years, part-time, after I retired from full time work. I got the replacement battery there, but in looking up which one to get, there were differences noted between the 2009 models, and the 2010-up. Turns out the difference is in capacity. My car is a 2009, but I put in the higher rated battery.


I must add, however, that it's been COLD here in western NY, the last couple of weeks.

 

What are your driving patterns? Are you taking long enough trips regularly enough for the alternator to fully charge the battery? If not, you may need to supplement with a battery charger.

 

I fully understand that "short hops" are bad on both the battery, as well as the oil in the engine. As I mentioned, my wife took a couple of short trips, and that most likely didn't do the battery any favors. On the other hand, the same usage probably wouldn't have had as negative an impact on my "winter driver" 4x4.


I later put the battery charger on the car for about 30 minutes....

 

30 mins isn't going to do much to a low battery.

 

ROFL - Left my car for six days at the airport - flat battery totally drained - Got a jump but it was not like a normal car as we know it needs a big jump it. We charged up for about 10 minutes before we went for the engine. I was wondering if anyone has seen their battery drain due to any hidden know leakage issues when it is completely off or if there is any special attention required or is it simply an old battery that needs replacing.

 

AFAIK, if there are no gremlins or problems causing drain (such as a trunk light which fails to turn off), the best preventative 'special attention' is to double lock the car and not leave the key fob(s) anywhere near it. To double lock it, press the door handle button twice within 3 seconds (with the key fob less than 2 feet away).

 

My current and previous Jags got the low battery message on a regular basis, however, it was not until my other vehicle needed a new battery about once a year that I was motivated to do the right thing. I now use battery tenders on both vehicles all the time they are parked in the garage. One vehicle uses the cigarette lighter socket and the Jag using the pig tail hookup to the battery in the trunk. I just leave the trunk (boot) lid open (the trunk light goes out after a few minutes). This gives me the best peace of mind possible. By seeing the indicator lights on the battery tender from time to time I can tell how frequently the battery needs a boost. A 'better' or 'best' grade of tender will be less than the price of a battery but should prolong the battery's life considerably.