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Welcome to JustAnswer, I'm Neal and I am here to assist you. Please feel free to ask follow up questions, it is part of the process.
Are there any other warnings or messages? Have you checked the codes?
they are the only warning messages that display when it has cut out.
sometimes there is a message that says ABS Fault and Traction Fault MPH35 then 5seconds later the engine cuts out
Normally I would say that you have a bad crank sensor, but with the other issues it sounds electrical.
I know this may sound odd but I have seen several batteries with bad cells test as good one time and then bad the next. Or continue testing good but actually be bad.
When I get issues like yours I replace the battery or at least swap another in temporarily to rule it out. I once chased a problem for two days after batteries tested good and it turned out to be a battery issue. So I learned my lesson.
Let me know what you find and I will continue to work with you until we find the problem, and if I can't help further I will direct your question to other experts.
the battery is only a year old and fires the engine up with no problem.
the engine only cuts out when it gets warm, and if i leave it 20mins it will fire up again and drive perfect untill it gets warm again and then it just cuts out sometimes with no warning.
as soon as it cuts out and i turn the key to start it again that is when i get the messages about ABS, Traction, Airbags and SRS
I understand that it is somewhat new but that by no means rules it out. New batteries go bad all the time. And a battery with a intermittantly bad cell will start the truck just fine. I have seen cases like yours that were just the battery so I want to rule it out first. I am not just guessing, this is from experience.
If you do not agree I will gladly opt out and see if another expert can assist you.
I will give it a go and let you know if it works
the messages stay on all the time, all the electrics work fine, the radio, heater and lights.