On the covered Bosch dishwasher platform, E16, E17, E3300, E3400 means there is an issue with water flowing into the dishwasher or the filling system. The water may not be able to enter the dishwasher. First, check the supply tap, inlet hose and inlet screen.
Try in this order
0 of 5 completedWhat to do first
ReversibleCheck the supply tap, inlet hose and inlet screen.
Correct only the documented fault domain
ReversibleRestore the supply; arrange service if the code persists with the tap fully open.
Check the supply and the filter screen
ReversibleConfirm the water supply valve is fully open. Turn it off, disconnect the hose at the dishwasher and look for sediment on the small mesh screen in the inlet; clean it gently with an old toothbrush and vinegar.
Inspect the AquaStop hose
ReversibleThe AquaStop hose has an electrically operated valve inside. If it fails, the hose is sealed and replaced as one piece.
Shut the tap before you clean the screen
ReversibleClose the supply tap, release the pressure by loosening the hose slightly into a towel, and then remove the hose to reach the small mesh screen. Reconnect firmly and open the tap slowly.
Evidence ledger
Sources behind this answer
Exact questions
Common questions about “Bosch dishwasher code E16, E17, E3300, E3400”
What does E16, E17, E3300, E3400 mean on a Bosch dishwasher?+
There is an issue with water flowing into the dishwasher or the filling system. The water may not be able to enter the dishwasher.
What is the minimum water pressure for a Bosch dishwasher?+
Repair guides put the minimum at 20 psi, with 40 to 120 psi as the working range.
Is E17 the same as E16 on a Bosch dishwasher?+
Not quite: guides describe E16 as not filling properly and E17 as too high a water level, which can be an inlet valve that does not close.
Could low house water pressure cause E17?+
Yes. If water trickles from a nearby tap, the dishwasher cannot fill in the time it allows. Open the tap fully and check the pressure at a sink, since a partly closed shut-off valve is the commonest cause.
Is a kinked hose a likely cause of the fill error?+
A kink or crushed section behind the dishwasher cuts the flow just as a shut valve does. Pull the unit out only as far as the hoses allow, straighten the hose and check for a flattened spot.
Should I run the dishwasher again after clearing the inlet?+
Yes: start a short cycle and listen for water entering within the first minute or two. If the code returns with the tap open and the inlet screen clean, the inlet valve or the control is the fault and it needs a technician.