You can blank it on the 2.2 but you will get the EML coming on after a while. It won't do any harm, or cause any problems, but you'll be wise to check the fault codes every so often to clear it, and see if there are any more codes stored.

Remove it and clean it properly, give it a good soak to make sure that the valve isn't stuck open.

Some people drill a hole in the plate to stop the EML coming on, but in reality the hole needs to be so big that it renders the blanking plate useless.