How do I fix

Not really seeing EF2 for dryer but may help to run through test cycle.
https://www.youtube.com/watch?v=isyRVKU8f14
Troubleshooting ideas below
https://www.youtube.com/watch?v=Q8j6fQM3P34
https://www.youtube.com/watch?v=ebJ9AyvyTMU&t=60s
https://www.youtube.com/watch?v=NVvI2kbOA-g

Only Codes listed that are close on Tech Sheet are EF1, EF3 and EF8. Many Other codes but not in that format. There is an EF2 Code for Frigidaire washers for oversudsing.

check bearings

Good Afternoon Friend,

I understand you are receiving an EF2 error code on your Frigidaire washer, model# GLTF2940ES. The EF2 code states that too much soap was used. I suggest running a cycle without any soap and any clothes in it. I ask that you please follow up with a comment on the post, at your convenience, to advise if further troubleshooting is needed or if your appliances status has changed successfully. Hope this is helpful.

-Best Regards-
WP

Could be by the brake booster and reacting to brake fluid pressure.

EF2 SUDS WARNING,

Ef2 could mean the vent hose is blocked or has come off.Slide it out from the wall and make sure the hose is ok.Hope this helps.

According to SearsPartsDirect.com ( http://www.searspartsdirect.com/washer-repair/error-codes/frigidaire-front-load-washer-error-codes.html ) : EF2 Condition Too much suds Check/Repair Reduce the amount of high-efficiency (HE) high-efficiency detergent being used in the washer.

EF2 on a Frigidaire washing machine indicates too much soap which could mean the pressure chamber is blocked or the pressure switch is held closed for some other reason. Try removing the small bore hose from the pressure switch and listen for a click when you do so, if there is a click it will indicate you have a pressure chamber blockage. The chamber will need to be removed and cleaned out don't just blow into it via the attached hose because it will block again after a few washes

The description of Ef 2 is told as error caused of excessive Detergent. Sir, Please consult another expert seperately for code Ed1. To tell, this error code is not described by anyone.

Thank you Sir, Have a nice day.