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error Bosch
Error Code E:88
Voltage error — supply voltage is too low (less than 98 volts).
? What Causes This
Insufficient electrical supply voltage.
✓ How to Fix It
Have the supply voltage and electrical installation checked by a qualified electrician. This is not a dishwasher fault.
Source: page 40 of the official manual
From the manual
This error code appears in:
Bosch SHSM63 Dishwasher