2015 XF 3.0 Supercharged and I'm getting a Battery not charging" intermittently and "key fob battery low" as well as "Can not apply parking brake".
Does anybody have any ideas? I just spent the last two months replacing all the plastic coolant system parts with aluminum. Now this. Would a dead secondary battery affect this at all?
Thanks

 

How old is the battery?
Might be time to replace it.
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It's the original battery, so definitely time to replace. Would that alone give me those messages?

 

Keep reading but yes nearly anything is possible once the battery starts acting up.
Consider yourself lucky as I am just about 100% sure a new battery will fix all those strange errors.

In fact that is the strongest sign it's a battery because those errors are unrelated to each other.
Now do change BOTH FOB batteries while your doing this as those also age and cause problems.

It would be helpful if you could post back on your repairs?
Remember we are all just guessing here on the Internet!
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That brings up another issue. I changed both FOB batteries last month and the message still showed up after they were changed.
Anyway, getting a new battery this week. Hopefully nothing catastrophic happens.

 

Prior to installing a new battery, charge it at 2 to 5 amps for three hours to make sure it's fully charged. Check with a voltmeter to see if it has at least 12.6 volts available so all the vehicle modules function correctly.

Just because a battery is new doesn't mean it's fully charged. Many sit on the shelves at parts houses for several months prior to being sold.

 

Thanks so much! That's a new one that I have not thought of.

 

So it's been a while, but found out this issue isn't my battery. Or at least doesn't seem like my battery. Still same issues, no parking brake, battery not charging message intermittently, sometimes the car has a hard time recognizing the fobs.
Anybody think it might be voltage regulator??
It's most likely not the alternator, right?
It's not a critical issue yet but it's annoying as hell.

 

With a new battery you have done the most common repair and now I think you need to get the car scanned with a working SDD?
If you suspect voltage or alternator problems get a cigarette lighter volt meter and see what the car is doing.
I run one and it helps to show what's normal for your car and what's not.

Example; I have a 2014 XJR it always settles at 11.5 VDC and always has when turned off. Yet Jaguar will tell you that's too low and you need to replace the battery. My factory battery is now approaching 10 YEARS old! So does my car have a problem? I don't think so and I have no symptoms but that 11.5 VDC does stand out!
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My battery is original, or at least whoever owned it before me had a LR/JAG battery put back in it. No dates on the battery that I can see. driving the car (letting off of the brake until the beeping starts) it kind of feels like the parking brake might be, in fact still engaged. Which is weird because before I removed the battery, the main concern was that the parking brake wouldn't engage at all. Is there any way the battery that powers the ECO could affect the EPB??

 

Do you hear the motor when you apply and release the EPB?
That does not prove the EB is working because the motor still has to pull the cables to apply the EB. But it's a good bet everything is fine.

Interesting question about the start/stop battery effecting things but I think that would be a no. Mainly because many of us including myself have disconnected the start/stop stuff completely with no side effects that I can tell.

I have an XJ and for some strange reason Jaguar set those up so the EPB is never applied unless the driver does it manually. Strange setup for sure!
Does the XF put the EPB on when shifted into P? I know my old S Type R did and was surprised when my later 2014 model XJ did not apply it at all.

One thing to note is these ZF 6 and 8 speeds stay in gear all the time and automatically down shift as you come to a stop. Sometimes you can fell the car holding back a bit because of this. Maybe your feeling that?
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EBrake kept beeping as if it was engaged after removing and reinstalling battery. Battery is good but there is the beeping now. Had my independent guy drop the rear suspension and check out the ebroke motor. Motor can be manipulated with computer but not with console button. Best guess, problem with wiring between the button and the motor. How does that sound? Anyone else had to go diving into the console looking for loose or chaffed wires?

 

Your problem is the beeping am I correct? Did you engage the EPB? If you haven't you need to, after battery change or you will hear constant beeping.

 

Have you tried to re-calibrate/reset the EPB?
Simple to do and might be worth a shot before tearing into wiring.
Here is a thread with some details that might help.
Reset EPB

Again I think you need a better scanner as you might be setting C codes from the EPB but your device can't see these types of codes?
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Tried the reset after the battery was put back in. No luck. My guy says he can actuate the brake motor with the computer. Just not the lever in the cabin. And yes, the beeping is the problem. We don't even use the EBrake that often. If I could get the beeping to stop, I wouldn't even bother repairing it yet.