E02
Mercedes-Benz
Control Pilot Signal Fault
Charging session aborts immediately; wallbox display shows E02 and vehicle reports ‘Check charging station’.
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
Loose CP (Control Pilot) connection in wallbox terminal block, Damaged CP pin in Type 2 connector, Faulty Mercedes-Benz wallbox control board CP driver, Miswired control pilot conductor in supply cable
How to Fix / Troubleshooting
Safety first: Isolate power at the main breaker feeding the Mercedes-Benz EV Home Charger. Confirm with a non-contact voltage tester that the unit is de-energized before opening any covers.
- Inspect the Type 2 plug CP pin: Look for bent, recessed, or burned CP pin. Clean gently with contact cleaner and a lint-free swab.
- Check internal CP wiring: Remove the wallbox front cover according to the Mercedes-Benz installation manual. Locate the CP terminal on the control board and verify the conductor is firmly clamped and not broken.
- Verify cable routing: Ensure the CP conductor from the cable gland to the control board is not pinched or damaged by the housing.
- Reset and test: Reassemble the housing, restore power, and plug in the vehicle. If E02 persists, test with another EV if available to rule out a vehicle-side fault.
- Professional service: Persistent E02 with multiple vehicles usually indicates a failed CP driver on the Mercedes-Benz wallbox control board. Replacement of the control board should be done by an authorized technician.
Advertisements
Repair Difficulty
Hard
4/5
Required Part
Wallbox Control Board (CP Circuit)
Check Price on Amazon
We may earn a commission from links on this page.
Advertisements