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Discussion Starter · #1 ·
Base model 2016 convertible. Last year the battery died. Took it to the local import specialty shop. They checked it out electrically, found battery was ok after charging. Since that time, no issue until the other day. Went to start it and got a warning to start car bc battery is low. I did, drove it for a bit and had the battery checked by the good folks at Autozone. Analyzer showed the battery is fine. Yesterday I received the IP warning again. I put my battery tender on it and have run it now for some 20 hours. Went to start it and it wouldn't turn over. I have left no feature inadvertently left on that would drain the battery. Has anybody experienced similar? Any recommendations? Thanks
 

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2014 Salsa Red Type S
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Have you recently had a state inspection done, or codes read? There is an issue with the OBD port that will drain the battery, if the connection is not properly closed before unplugging. A key to watch for is the triangular hazard switch light. It will remain lit after shutting down. Normal behavior is for it to go out ~10 minutes after shutdown. The fix is to disconnect the battery ground cable for ~30 seconds and reconnect. Be aware you’ll need to reset power windows, per owner’s manual afterwards.
 

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Discussion Starter · #3 ·
Have you recently had a state inspection done, or codes read? There is an issue with the OBD port that will drain the battery, if the connection is not properly closed before unplugging. A key to watch for is the triangular hazard switch light. It will remain lit after shutting down. Normal behavior is for it to go out ~10 minutes after shutdown. The fix is to disconnect the battery ground cable for ~30 seconds and reconnect. Be aware you’ll need to reset power windows, per owner’s manual afterwards.
Thanks so much. That was really helpful, especially the description about the hazard light issue. As instructed, I disconnected the ground and after a minute and then reconnected. However, no change to the circumstances. I did talk with a Jag dealer service rep who did inform me that they do a hard reboot after each OBD hookup. They don't know why the battery goes dead but it does. So, I jumped it with my other car and it wouldn't start. Turns out, even with the other car operating with higher revs it wouldn't start. So, I had a service with a battery pack jump it and she fired up. So far so good but I'll know better tomorrow when I try it again. Windows were unaffected, but of course the clock and date are off which is no big deal. To sum up, your recommendation would have worked but the battery was drained. I guess next time I get it inspected (NYS requires hook up and analysis thru the OBD) I'll have a hard reboot done as well. English electronics eh?

One other issue I noticed. The stop/start feature has been inconsistently working recently, and when I put some battery charge driving after the jump I noticed it wasn't working. Don't know if that is related to the inspection/OBD generated issue or if it's a separate issue, as in the Ni Cad battery for that feature is now kaput. Note: the stop/start light on the switch is still illuminating.
 

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Discussion Starter · #5 ·
Update: Albany Jag dealer service rep (nice guy) informed me I should disconnect the battery for an hour to let the modules 'reset'. Otherwise, by his experience, the issue could come back due to a module retaining code/instruction or some other scungilli that will result in the dreaded low battery issue returning. He also said not to worry about the stop/start feature not working for now. It will come back after 40 or 50 miles. Again, Jh, thanks for your invaluable help. hope by my experiences with my car I can be of service to other Jag owners
 

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Base model 2016 convertible. Last year the battery died. Took it to the local import specialty shop. They checked it out electrically, found battery was ok after charging. Since that time, no issue until the other day. Went to start it and got a warning to start car bc battery is low. I did, drove it for a bit and had the battery checked by the good folks at Autozone. Analyzer showed the battery is fine. Yesterday I received the IP warning again. I put my battery tender on it and have run it now for some 20 hours. Went to start it and it wouldn't turn over. I have left no feature inadvertently left on that would drain the battery. Has anybody experienced similar? Any recommendations? Thanks
Copy that! Had the same w my 2017. Plugged in since check engine was on to discover it was an 02 sensor. Afterwards now have low battery indicator on. “Tendered” it and unplugged ground. Was ok for a while, went to PA in other vehicle, came back and found my beast dead. Can’t get trunk open so started charge then lights started flickering. Hired an exorcist to come by and pray.
 
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