by Travis Lambert March 10, 2022. Auto start-stop technology is designed to shut off your vehicle's engine when it comes to a stop, and then restart when you accelerate again. Because the engine is turning off and on exponentially more times than a vehicle without auto start-stop tech, the ignition parts wear out faster and can be costly to fix. We had a 2015 Cherokee 6cyl which had the stop start system. For some reason a bad stop start battery caused the transmission to shift a little funny. The dealer replaced the stop start battery and the transmission shifted more normally. I purchased a stop start module on ebay that plugged into the ODB2 port. It worked well. As a basic property of matter, engine parts expand as they heat up. The piston and rings in a cold engine remain somewhat loose. If this wasn’t the case, your engine would seize as these parts expand and become wedged in the cylinder. As the engine runs, the heat produced expands them to their ideal tolerances. This happens at about 195 If the amount of fuel required to operate during a cold start is not received by the engine your car will stall. 3. Bad Intake Air Temperature Sensor. A bad or malfunctioning intake air temperature sensor can create an issue with the air-fuel mixture of your car, causing it to stall or run rough. The computer relies on the IAT sensor to Step 1: It is quite difficult to replace the auxiliary battery as it is located underneath the fuse box. At the very top of the battery, there are two 10mm bolts on the top. Take the bolts off with the help of a bolt extractor. In the battery, there is another 10mm bolt. You have to take the bolt off too. . 2022 Big Bend Sport auto start-stop feature causes engine to die: Auto stop/ start staying off with "vehicle charging" message: 4D Tech auto start-stop disable: Possible Auto Start/Stop Disable using Forscan: Florida For Sale: All Weather OEM Floor Mats, Console Safe & Auto Stop Start Harness/Kit Protect your car engine by idling less. Frequent restarts are no longer hard on a car's engine and battery. Frequent restarts are no longer hard on a car's engine and battery. The added wear (which amounts to no more than $10 a year) is much less costly than the cost of wasted fuel (which can add up to $70-650 a year, depending on fuel prices Also called keyless ignition, the push-button start is a type of ignition system that lets you automatically start the engine. It replaces the traditional keyed ignition in older vehicles. The push-button start system has the same job as the keyed ignition system in older vehicles. I have found with my '24 that if you come up to a stop you actually need a somewhat heavy foot on the brake for auto start stop to activate. If you rest your foot on the brake with just enough force to defeat torque converter creep, the car wont shut off. Hopefully someone will find this helpful as I know this is a hotly debated topic. if you Next check for ground at the starter relay control. The relay should only get ground from the PCM when the ignition switch is in the START position. If you find ground in the RUN position, check the ignition switch wiring for your year, model/engine the START wire is NOT hot while the switch is in the RUN position.

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