I picked up a new 2016 model Grand Cherokee two Months ago and (A)! was lit from the first start due to "start/stop system needs service". Dealer ordered a relay and it took two months to get it. Once installed problem still remains and it all seems to be a guessing game. Will propose the battery replacement (probably backup bat).. What is the Start-Stop System in a Jeep? The start-stop system in Jeep models like the Cherokee, Renegade, Compass, and Wrangler is a fuel-saving technology that automatically shuts off the engine when you come to a complete stop, such as at a traffic light or stop sign.. When you take your foot off the brake, the system seamlessly restarts the engine so you can accelerate when needed.
Well, I just had this message pop up this morning "stop/start unavailable service stop/start" or something close to it. A chime and a warning light to go with it. Only 5300 miles on her, but she was built in 11/15 so it could be the battery going bad. I'll let you know after I get it into the shop. Also the volt gauge looked to be at about 14.5.. What is Stop-start system on a Jeep? The Stop/Start system on a Jeep is a fuel-saving feature that automatically shuts off the engine when the vehicle comes to a stop. This system is designed to conserve fuel and reduce emissions by eliminating unnecessary idling. To restart the engine, the driver simply presses the gas pedal or shift into gear.