Join Date: Feb 2016
Location: Ontario, Canada
ESS - system disabled, maintenance required message
I posted the other day on the 83361-engine-stop-start-ess thread as it took our Jeep dealer a while and a few trips to him for them to figure it out and it is a faulty "Battery Intelligence Sensor" .
I live in Ontario Canada and the entire winter the ESS has not come on, just thought that with the cold temps outside that it automatically disables it self but no real concern to me but then a few weeks back had a warning appear on the screen saying something to the effect "ESS - system disabled, maintenance required". The message only appears for about 3-5 seconds so I had no time to snap a picture or barely read what it said and that was each of the like 30 times it popped up since.
There is a little orange icon that then appears on the screen showing there is an issue so we took it to the dealer. Well when the vehicle is turned off the screen warning resets and guess so does the warning code as they could not find a fault. Well we left the dealer and the next day it happened again so we booked an appointment, they had it for the day, found nothing so we left and once again it appeared. We booked another appointment and left it with them overnight, they had it the next day, checked could find no issues but replaced a few modules. My wife picked it up, drove it away and it came up again, she turned around, went back and went into the shop to show them, but of course she turned it off so there was nothing for them to see. Again she left, again it came on, again she went back but this time left it on, they seen it, plugged into the ODB and read the code and turns out that it is a faulty "Battery Intelligence Sensor" but they had to order one which it is now on order and set to be replaced next week.
So in short, if this ever happens to anyone, do not shut it off, go STRAIGHT to the dealer and tell them to plug it in while its running as for some VERY strange reason this code clears once the engine turns off and no record of it shows int he ODB.