My 2016 F-type S has about a month remaining on the CPO warranty. Last week I took the car in for an oil change and state inspection. I brought it home on thursday, parked it in the garage and went away for the weekend. This morning the battery was completely flat and the trunk would not open. I put it on a trickle charger and called the dealership to ask whether my car is one of the ones that needs the battery disconnected after the OBD 2 is used. The dealership said it was not. Last year, after a state inspection, I had a completely dead battery. The car was towed to the dealership and a new battery installed under warranty. I asked this morning if the battery that was installed less than a year ago was bad, would it be covered by warranty and was told it would not. The service advisor said that batteries aren't covered by the CPO warranty and because the battery was replaced last year under warranty it would not be covered. I was told that if I would have purchased the battery and if failed within the year it would be covered, but because it was a warranty item it wasn't covered. The trickle charger did nothing to charge the battery, but I was able to get the trunk open after hooking up a jumper pack. I now have the battery out of the car and hooked up to a charger. I have a feeling it is shorted out and won't take a charge. I can get a Duralast battery tomorrow for $189 with a three year warranty, but intend to call the dealer first to see if they will cover it. Has anyone had this issue? I tried to RTFM but couldn't find anything online or in my paperwork that spells out the scope of the CPO warranty. What the dealership is telling me just doesn't make sense to me. Any input would be appreciated. John

 

Batteries are Not covered.

 

1. Based on your description regarding when your battery has died, you do indeed have the OBDII issue. Most dealers don’t even acknowledge that problem on any car.
2. Batteries are never considered a warranty item by the dealer but will be replaced as a courtesy early in the life of the car. The battery manufacturer may offer a separate warranty. Battery failure towards the end of a 5 year warranty period would be considered normal wear and tear.
3. Trickle charging a totally drained battery could take more than just a few hours to revive it. Leave it on the charger overnight, or jump start the car with the battery installed. The latter will take just an hour or two of driving to get the charge back to where it’s functional.

 

Batteries are covered under the original warranty, but not CPO.

 

This. Your dealer is wrong, it's the ODBII issue.

 

BTW, your battery probably does not need replacing. When the dealer gifted me a dead battery last time I brought my car into them, I trickle charged the battery and I've been using that same battery for about a year now with no issues.

 

An update. I took the battery out of the car to charge it and it still wouldn't take the charge. I called the service manager at my dealer, Rahal South in Pittsburgh, and he said he would prorate the battery, because it was just installed less than a year ago. I went to pick up the new battery and the service manager said they would cover the battery, at no charge. I put it in the car and everything is back to normal. I discussed the OBD2 issue with the service manager and he wants me to bring the car in later in the week to see if the dealer can duplicate the issue. He told me the later Land Rovers have the OBD2 issue but he wasn't aware of it affecting the F-Type. I told him about all the list members experiences and about disconnecting the battery to resolve the issue. I am looking forward to what they find out, but not holding my breath that they will find anything wrong. I am dropping the car off this thursday and will let you all know the results of their test.

 

By the way, I had the battery on a trickle charger for 24 hours and a conventional 10/2 amp charger for a couple more hours and couldn't get it to charge.

 

Service departments hate it when we come in and say 'I read it on the internet', but the fact is the internet has saved me a number of issues with these cars. The dealer exited out of their ODBII connections incorrectly on my car and a few days later I had a dead battery. The dealer flat out denied it was their fault. This is also the same dealer that overfilled my oil 3 times. My car came with 5 years of pre-paid service. I declined to use the final ones and paid the money to take it to an independent shop that I trust (they actually check the oil level instead of letting the machine just squirt in as much as it says should go in, which is wrong on the AWD cars. The internet also told me about the service bulletin for the sound system and the one for the fuel filler that the dealer didn't know anything about.

The internet is full of a lot of crap. This forum has been rock solid and saved me many times. I found this forum when I was looking for how to disable the eco stop/start and I was able to accomplish that in minutes (from hitting search to applying the fix).

 

Definitely the OBD issue. My 2017 has it every year at state inspection

Note that once the battery is totally drained (to just a few volts) some trickle chargers detect it as a 6v battery and therefore won't charge it. And sometimes the total discharge just damages the battery
Either way the rate of car drain is faster than the rate of charge of my ctek so last year mine went dead after inspection even on the ctek!

 

It is an OBD issue, despite what all the Jag service managers & advisors say.
I wished Jag/LR just acknowledge it & install a $10 part for us to quickly disconnect then reconnect the battery, without erasing all the electronic memories, for us to do every year after inspection time...

 

That's setting the bar pretty low. How about set it up so that the battery doesn't drain if an ODBII connections is terminated? Literally no other car I have ever owned has had this issue.

 

Try using a dumb charger. Sometimes smart chargers have mechanisms that don’t allow them to charge a completely dead battery

 

Same thing just happened to me with my 2017 manual. I had read about this issue on this forum and thought to myself, "I should check to see if the car still runs," but I left it alone for several days. Woops. No start. I'm getting the battery replaced under warranty. Any time a battery fully discharges, especially an older one like mine, it's never the same. Better to scrap it. And do not get some cheap duralast battery. These cars and other expensive Euro cars use AGM batteries that require special programming when they're installed. If it's not done right, you'll wear that duralast battery prematurely because the car won't know the charge level. Someone chime in if I'm wrong here. My dad's 2014 3-series needed a new AGM and a reprogramming through his independent mechanic. That was $300. At the dealer it would have been $400+.

 

While it may not be a CPO thing, the battery itself SHOULD have some sort of a warranty...after all, if I go buy one off the shelf, it will come with somewhere between 36-84 months of warranty, with a prorate kicking in somewhere after a year or so.

 

I don't know about the early cars but when my battery ran flat, it still had enough juice to call InControl and tell them it was flat, and I didn't lose any of the settings, so I suspect Jaguar didn't actually let my battery run down completely, just enough to stop the car from working. I gave mine a full charge and it's been fine ever since (2.5 years now). The car also stored battery low codes for every module (I'd never seen so many errors!), so whichever had caused the drain had been reset.

 

I don't believe you need the special programming to change the battery. The BCM system recalibrates itself so it will catch up. It does a partial drain and recharge to adjust to the current state of the battery so it will adjust for the new one when it next does that

Definitely AGM battery. If you buy at autozone or somewhere like that you get a full warranty for 2 years (depending on the type of battery you buy). Not pro rated. I had one on my XF that did 22 months and then wasn't fully charging and they replaced it for free. No questions asked

I've personally found they recharge fine from a full accidental discharge - but as you say older ones age and the chemical reaction becomes more permanent so they don't come back as well.

 

I dropped my car off at the dealership this morning and left it for the weekend. The service manager said they would hook up the PA Emissions test OBD2 cable and then let the car sit for a couple days to see what happens. He also confirmed that the battery I dropped off the other day was completely dead and would not hold a charge. He told me they hooked it up to their tester and it showed the battery was shot. I will report when I hear back from the dealer on Monday.

 

So when u come home with a brand new battery on Monday, get ready for dead battery again by Wed, since dealer hooked up OBD...

 

Or save some hassle by checking that the hazard lights switch light goes out within about 10 minutes of locking the car .... If it doesn't, do the battery disconnect trick.