Do what guitarists "do" (already have) put markers on the violin finger board (no clue how it's called since it has no frets) so that you can SEE where the right place to press is. Play along with songs, that's the best way to force your ear compare the "right" notes with the "wrong" notes. And that's all I can think of for now, the rest is parctice practice practice and instinct, the more you practice the right thing the more your brain will understand that you're doing the wrong thing and command you to correct it.

Do what guitarists "do" (already have) put markers on the violin finger board (no clue how it's called since it has no frets) so that you can SEE where the right place to press is. Play along with songs, that's the best way to force your ear compare the "right" notes with the "wrong" notes. And that's all I can think of for now, the rest is practice practice practice and instinct, the more you practice the right thing the more your brain will understand that you're doing the wrong thing and command you to correct it.

addition Playing slow with a metronome helps as well. Programming your muscle memory and then gradually speeding up. You probably hit it sharp/flat because your muscle memory commands you to. Try to re-write it. Not such an easy thing.