812 Issues with electronic keyless system or battery

The vehicle is relatively often in a reduced mode after starting. Then I can only drive in WET mode and many errors appear in the display. Sometimes it is enough for me to switch off the engine and leave the vehicle. Then I open the vehicle again with the radio key and after starting the engine all error messages are gone. I cannot systematically trace the error. But it mainly happens when I have opened the bonnet after switching off the engine, or if I have used the lift beforehand. But this may just be a coincidence and not the cause.

Is the problem known?

 

I am almost certain that it’s the battery. Get it replaced. The slightest drop in voltage will cause all sorts of gremlins.


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Once you turn on the car with the key, do ensure to wait till most lights are off before starting the engine.

 

it’s the battery typically causing electric issues

 

Ironically, this happened to me a month ago.....had the OEM garbage battery changed to the Interstate MTX-94R/H7....gremlins gone

 

exactly

 

I had similar electrical issues despite fact that 812 GTS had been on on factory battery tender for several months. IT REMAINS under its new car 3 year warranty. Dealer confirmed that battery would not hold charge and replaced the $1600- OEM battery at no charge to me. I was told by my excellent service advisor that battery would not have been replaced under supplemental extended warranty. If I later switch to interstate battery while under extended warranty, would this battery void other warranty coverage??

 

The dealer also sells and installs the Interstate battery, so you're good. This will not void any warranty whatsoever. And, btw, with the extended warranty, my battery has been replaced a few times.