‘19 prostar auto start/stop not working?

The voltage criteria is 12.1 volts and the system will start. Once the voltage has been 12.7 volts or more for 70 continuous minutes, the engine will return to idle for 90 seconds and then shut down. So you need to see what the engine is seeing for voltage, and then time it.

 

There are some trucks with programming conflicts where the body controller is not programmed correctly to see oil temp and thinks the engine is cold all the time once the other shutdown requirements have been met, and therefore, keeps the engine running.

 

Did you ever find out what it was? Mine is doing the same thing and they can't find the problem

 

I've been going through the same thing with shop not being able to figure it out.
Brand new gel batteries and cleaned corrosion from body control still kicking on at 12.9v and not shutting off..
HeavyD has tried to help and its much appreciated brother.
My shop that I use got in touch with international and they said that there are many temp sensors in oil pan and dont know which one is dedicated to autostart/stop switch..This is a real nightmare.Just spent 1600 on 4 gel batteries after they were found to have low voltage and shop is stumped with not much help from dealership.
HeavyD do you know what sensor the autostart/stop uses?

 

There is only one oil temp sensor in the oil pan. It screws in from the outside so you can see it and the wiring. Are you saying your oil pan has more than one sensor in it? I don't think I have seen that?

 

Anymore updates on this?

 

Anymore updates on this?