2005 Toyota RAV4 injector fault code

First noticed a slight chugging and/or missing in slow town traffic - developed into intermittent lumpy running - started stalling occasionally - now cutting out more and more frequently - engine error code indicates something wrong with injectors but doesn’t say which one - garage cannot pinpoint the problem so cannot suggest a solution - anyone else had this on a 2005 Toyota Rav4 DVD?

Have no idea what a Rav4 DVD is but you need a different mechanic as this should not be a major problem.