2004 ford explore code 4l2t-10849-cf serial number 0020315a. what this mean?

https://workshop-manuals.com/ford/

Go here www.radio-codes.com

If you mean how do you turn the check engine light off, you would need to clear the codes with a scanner or code reader first.

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You will need to pull the radio out and give me the serial number off of it. The serial number will start with the letter "M" and have 6 numbers after the "M". I'll be happy to run it through my decode software if you get me that serial number. You can comment/reply here with the number or feel free to email me at [email protected] and give me the serial number. I'll be happy to run it for you.

The radio SERIAL NUMBER is required for a code
Sometimes pressing buttons 6 & 1 together or 6 & 2 will display your Serial Number Otherwise remove the radio from the dashboard and post the SERIAL NUMBER found on a label on the casing
It usually begins with M++++++ or V++++++ ------------------------------------------------------------------------------------------------------

I believe the codes 9318, E013, and 9352 all relate to low/weak/faulty/insert-messed-up-adjective here battery...replacing the batter should fix the problem.

You need to narrow down the problem first because the light can mean countless things. If you go to most auto parts stores they will either do a diagnostic on your car or they loan you the machine that you can use right there. Run the test on your vehicle and find out the codes. If they don't tell you what the code or codes mean then come back on here and I or somebody else can help you figure it out. Hope that was helpful.

i need the serial number then i can give you the code

If the code card is not in the owners manual or with the vehicle, you may have to call the dealership with you VIN number, sometimes they will say you have to go in so they can charge you of course.