What is this problem? (Sorry because i can't name it)

Hi all,

Thanks for reading my thread!

My Ranger is 2014 model (I know it's old). It works without problems for years and i usually have it maintenanced.

But today, when i drive it to work, there's an error signal on the control panel.

It looks like this:



It appears after i start the engine and drive for a while.

Although i turn the engine off and turn it on , the signal still appears.

I'm going to have my car repaired at the garage. But i want to know your ideas about this error.

Thanks all you guys alot!

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Gia xe Ford Ranger 2017