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How to fix common Bosch error codes

Alton Alexander
By Alton AlexanderUpdated on June 4th, 2022

Bosch error codes are typically caused by a faulty sensor or a problem with the electrical system. The most common error codes are E01, E02, and E03, which indicate a problem with the throttle position sensor, the engine speed sensor, or the fuel injector, respectively. Other common error codes include E04 (oxygen sensor), E05 (coolant temperature sensor), and E06 ( knock sensor). These codes typically indicate a problem with the sensor itself, or with the wiring or connectors to the sensor.

Common Bosch error codes

  1. For Bosch error code E01, check the door switch for proper operation.
  2. For Bosch error code E02, check the water supply for proper operation.
  3. For Bosch error code E03, check the drain hose for proper operation.
  4. For Bosch error code E04, check the washing machine for proper operation.
  5. For Bosch error code E05, check the drying cycle for proper operation.
  6. For Bosch error code E06, check the washing machine for excessive vibration.
  7. For Bosch error code E07, check the washing machine for proper operation.
  8. For Bosch error code E08, check the washing machine for proper operation.
  9. For Bosch error code E09, check the washing machine for improper installation.

1. Bosch error code E01

  1. Turn off the power to the machine
  2. Remove the screws that hold the top cover in place
  3. Locate the door switch and test its operation by pressing and releasing the switch
  4. If the switch does not work, replace the switch.

2. Bosch error code E02

  1. Turn off the power to the dishwasher.
  2. Open the dishwasher door and check to see if the water is running. If it is not, turn off the main water valve to the house and turn on the dishwasher.
  3. Close the dishwasher door and turn on the power to the dishwasher.
  4. Check the water supply for proper operation by pressing the hot and cold water buttons. If the water is nothot or cold, turn off the main water valve to the house and turn on the water to the dishwasher.
  5. If the water supply is okay, check the dishwasher for the correct error code.

3. Bosch error code E03

  1. Remove the cover from the dishwasher drain hose.
  2. Make sure the drain hose is fully inserted into the dishwasher drain.
  3. Check for blockages in the drain hose. If there are blockages, remove them using a plunger.
  4. Inspect the dishwasher drain hose for any tears or holes. If there are tears or holes, replace the dishwasher drain hose.

4. Bosch error code E04

  1. Verify that the washing machine is plugged into an electrical outlet and working.
  2. Verify that the water is turned on and properly flowing into the washing machine.
  3. Verify that the washing machine is set to the correct cycle and program.
  4. Verify that the clothes being washed are properly loaded into the washing machine.
  5. Verify that the washing machine is set to the correct temperature.
  6. Verify that the clothes being washed are properly rinsed.
  7. Verify that the clothes being washed are properly dried.

5. Bosch error code E05

Check the drying cycle for proper operation:

  1. Check the water level
  2. Check the temperature
  3. Check the airflow
  4. Check the timer
  5. Check the pump
  6. Check the filter
  7. Check the fan
  8. Check the exhaust
  9. Check the water connection
  10. Check the water pressure