E202
Bosch Real-Time Clock / Scheduling Fault

Bosch EV charger shows E202 when attempting scheduled charging; unit will not follow schedule.

Advertisements

Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Advertisements

Possible Causes

RTC battery failure on PCB, Corrupted time settings, Firmware bug in scheduling logic, Power interruptions causing time loss

How to Fix / Troubleshooting

Safety first: No internal access is needed for basic troubleshooting.

  • Disable schedule: In the Bosch app or charger menu, disable all schedules and test immediate charging. If charging works, the fault is limited to scheduling.
  • Reset date and time: Manually set the correct date and time in the app or charger interface. Ensure the time zone is correct.
  • Firmware update: Check for and apply any Bosch firmware updates that address scheduling or RTC issues.
  • Use external scheduling: As a workaround, use your vehicle’s built-in charge scheduling while leaving the Bosch charger in always-available mode.
  • Board service: If E202 persists and time resets after power loss, the RTC circuit or backup battery on the main PCB may need replacement by a technician.
Advertisements

Repair Difficulty

Medium 3/5

Required Part

Main Control Board (RTC Circuit)
Check Price on Amazon

We may earn a commission from links on this page.

Advertisements