Error code reference

Bosch Dishwasher Error Code E4

Aquasensor error - indicates a fault with the aquasensor calibration.

SourceBosch Dishwasher SHE55M02UC - Service Manual: Fault Memory & Diagnostics

Diagnostic procedure

The full E4 procedure

Step 1 is visible so you can confirm you are on the right page. The remaining steps, the ones that tell you whether to actually replace a part, unlock with any pass.

MyPros+ · DiagnosticsStep 1 preview
1
First diagnostic step
Check the motor-operated water switch underneath the heater assembly.

SourceBosch Dishwasher - Service Manual: Installation, Operation & RepairPage 7-8, Section 3.4.2

More steps, wiring diagram references, and verified part numbers
Includes expected resistance and voltage values, connector pinouts, and supersession notes for replacement parts.
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Where this code is documented

9 manuals in the MyPros+ library document this code for Bosch dishwasher.

Models covered by the manuals that document this code

More models are covered than are listed here.

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