Go Team Battery!

Post #17 here:

"Only real problem was electronic hand brake which often did not work, just parked in gear. Problem disappeared when I replaced the battery in 2018. The battery was the original Jaguar one which I had never replaced. New one solved the problem."

https://www.jaguarforums.com/forum/s...1/#post2433280

 

Yet another battery! Goodness, I could cut glass with my nipples. See post #8 here:

https://www.jaguarforums.com/forum/s...2/#post2451587

With this one, note how the new battery didn't clear the faults immediately. I suspect the battery was not fully charged at time of sale (very common), and required a bit of driving to fully charge it. Just a hunch, but if stated with enough authority, it sounds reasonable.

 

Three more examples to report:

1) A clear-cut tired battery, 14 years old! See post #11:

https://www.jaguarforums.com/forum/s...2/#post2454109


2) Here the problem wasn't the battery itself, but a loose cable terminal not making good contact with the battery post. Note in this example, only a DSC fault was present:

https://www.jaguarforums.com/forum/s...-3-0-a-266293/


3) Here's a very interesting thread. See the resolution in post #11, which also mentions the typical problem (DSC, PARKBRAKE, and ABS fault messages) resolved 5 years earlier with a new battery. In this latest instance, the only initial symptom was the horn intermittently sounding with the car parked. As the 5-year-old replacement battery slipped into the grave, the same three fault messages returned. Note how the battery was confirmed to have a dead cell. Even though the starter speed had dropped off somewhat with the failing battery, the decline was gradual enough to not be obvious. I mention this as a reminder not to use starter cranking speed to determine battery condition:

https://www.jaguarforums.com/forum/s...-issue-267177/

 

Another interesting one, caused by wear on the key:

https://www.jaguarforums.com/forum/s...0/#post2659928

Well worth a read. Also see post #15 above for a similar fix.

 

Go Team Battery! This one simply needed a good charge. See post #7:

https://www.jaguarforums.com/forum/s...8/#post2669158