Check engine light turned on after water got into the fuel tank?

It depends on how much water got into the tank. They make fuel dryers for small amounts, but this doesn't work, you will need to drop the tank and clean it out. Here are instructions on how to do the job. You might be able to remove the fuel pump or sender to reach a syphon hose down into the tank to drain it. This video may help:

https://youtu.be/Q5MH2gnyFH0

Here is how to clear the codes:

https://youtu.be/ahK_eucFi-k

Please go over these guides and report back.