help!! error code 4SNS/1/40000001:VPOR--12.214

Is this an incidental finding or did problems with the computer cause you to run Hardware Test? If it is having problems, please detail what you found.

what does this mean

Specifically that is a voltage (V) sensor (4SNS) problem on the power bus (P).

....and how do I get it fixed

That totally depends on the the MacBook Pro's SUB-MODEL (from "about this Mac."), the part with a year and Early, Mid or Late appended:

That makes a difference because some MacBook Pros have a power sub-board that can be replaced without replacing the entire logic board. That MAY stop the notification if the offending sensor is on the power board.

See if the MagSage connectors both on the computer and the power adapter are clean and free of anything that can prevent a solid contact:

Apple Portables: Troubleshooting MagSafe adapters - Apple Support

Deangelo2020 wrote:

I got this error code when I ran diagnostics on my apple MacBook Pro 4SNS/1/40000001:VPOR--12.214

what does this mean and how do I get it fixed

I suspect this is a voltage sensor error on the power bus of your portable system.

Are you experiencing issues?

Why run the AHT?

This may require a board replacement...

If it is the DC -inboard that part is replaceable for ~115.00 parts and labor USD.

YOu can have it looked at but Apple may refuse to work on vintage/obsolete

however any computer store would do the work.

https://support.apple.com/en-us/HT201624

Deangelo2020 wrote:

It is not having any problem except that I thought the temperature was bit high, but late realised it was the flightgear sim I use it for. Regardless I still think the heat is much.

But I’ve noticed since morning, that the temperature was normal as I created enough space for ventilations.

but I’m still worried about the error code, worried if it might cause any other problem if left unfix

Any other issue here would be a charging issue.

It is not having any problem except that I thought the temperature was bit high, but late realised it was the flightgear sim I use it for. Regardless I still think the heat is much.

That, as you found is unrelated. Good move on making sure the ventilation is good.

...but I’m still worried about the error code, worried if it might cause any other problem if left unfix

Again, we can help better with suggestions and the outlook if we knew the sub-model. Many of us can remember the last Ice Age so we are pretty bad at guessing!