How do i clean fuel injector without removing the injector.

Is there a reason you think you need to? Cleaning truck injectors isn't really a thing

 

Those are voltage faults IIRC. The additive will have no affect on those.

 

What engine?

 

No performance issues? All three codes?

 

fuel injector cleaners work best when everything is new, and you use a cleaner every xx amount of miles.

as an example i buy all my cars new...at 3,000 miles i add Lucas Fuel Injector cleaner, to a full tank of gasoline.

and then every 3,000 miles after that, until i sell the car.

to use a cleaner so late in the game, you really ain't gonna derive any real cleaning benefit.

gotta be pro-active with that stuff.

if an injector is giving a code, it's most likely internal to the injector, and if one is throwing a code now, sooner or later they all will.

i thought that i heard "some guys" change out injectors after xxxxxx amount of miles, get them rebuilt or replaced.

sorta like a 'preventative PM service'