Bosch EV Home Chargers Error Codes
Complete list of fault codes and troubleshooting guides. Use the search below to find your specific error.
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E101
Bosch EV home charger will not start charging; display shows E101 shortly after plugging in the vehicle.
Proximity Pilot (PP) / Control Pilot (CP) Communication Fault
E102
Bosch EV charger displays E102 and refuses to start charging when the vehicle is connected.
Ground Fault / Insulation Monitoring Trip
E103
Bosch EV home charger shows E103 and does not energize the relay; no charging current flows.
Contactor / Relay Welded or Stuck Fault
E104
Display shows E104 and charging stops or never starts; unit may briefly power the vehicle then shut down.
Overcurrent / Output Overload Protection Trip
E105
Bosch EV charger shows E105 and refuses to charge; may occur after a power outage or surge.
Input Overvoltage / Undervoltage Protection
E106
Charger displays E106 and will not start; internal fan may not run even when unit is warm.
Overtemperature / Cooling System Fault
E107
Bosch EV charger shows E107 and charging stops; may occur when using Wi‑Fi/app features.
Internal Communication / Firmware Fault
E108
Display shows E108; charger powers up but will not recognize that a vehicle is connected.
Vehicle Detection / Proximity Circuit Fault
E109
Bosch EV charger shows E109 and stops charging; may occur intermittently during a session.
Ground Continuity / Protective Earth Fault
E110
Charger displays E110 and will not start; often appears immediately at power-up.
Self-Test Failure / Internal Hardware Fault
E201
Bosch smart EV charger shows E201 and cannot connect to Wi‑Fi or Bosch app services.
Wi‑Fi Module Communication Error
E202
Bosch EV charger shows E202 when attempting scheduled charging; unit will not follow schedule.
Real-Time Clock / Scheduling Fault
E301
Bosch EV charger shows E301 and charging is disabled; often associated with RFID or access control features.
Authentication / RFID Reader Fault
E401
Bosch EV charger shows E401 and stops charging shortly after start; may coincide with utility demand response features.
External Control / Load Management Fault
E501
Bosch EV charger shows E501 and the display or LEDs do not behave normally.
User Interface / Display Communication Fault
E601
Bosch EV charger shows E601 and refuses to start; error appears after a lightning storm or surge event.
Surge Protection / MOV Failure
E701
Bosch EV charger shows E701 and charging is disabled; may be associated with DC leakage detection.
DC Residual Current Detection Fault
Symptom
Bosch EV charger cable or handle becomes unusually hot to the touch during charging.
Overheating Connector / High Contact Resistance
Symptom
Bosch EV charger clicks repeatedly (relay chatter) when a vehicle is plugged in, but charging does not start.
Unstable Contactor Drive / Pilot Negotiation Failure
Symptom
Bosch EV charger does not follow programmed charging schedules; it either charges immediately or not at all.
Scheduling / Timer Misconfiguration
Symptom
Bosch EV charger emits a loud humming or buzzing noise during operation.
Mechanical Vibration of Contactor or Transformer
Symptom
Bosch EV charger frequently causes nuisance trips of an upstream GFCI breaker or receptacle, even though no visible faults are present.
GFCI Coordination / Leakage Current Nuisance Trip
Symptom
Bosch EV charger intermittently stops charging mid-session without any error code; LEDs may briefly flash.
Intermittent Power Loss / Thermal Cutback
Symptom
Bosch EV charger makes a faint high-pitched whine during operation, especially at higher currents.
Switching Power Electronics Acoustic Noise
Symptom
Bosch EV charger powers up and shows ready, but the vehicle will not start charging and shows 'charging station error' with no code on the charger.
Control Pilot Signal Out of Tolerance
Symptom
Bosch EV charger randomly reboots during charging (LEDs go off and back on), causing brief interruptions.
Internal Power Supply Instability
Symptom
Bosch EV charger trips the upstream breaker or GFCI immediately when a vehicle is plugged in.
Short Circuit or Ground Fault on Output
Symptom
Bosch EV charger’s cable insulation shows cracks, cuts, or severe abrasion.
Output Cable Mechanical Damage
Symptom
Bosch EV charger’s enclosure is cracked or physically damaged after impact (e.g., vehicle bump).
Mechanical Enclosure Damage / Potential Ingress Risk
Symptom
Bosch EV charger’s front LED or display backlight is very dim or flickering, but charging still works.
User Interface Backlight Degradation
Symptom
Bosch EV charger’s front panel buttons are unresponsive or require excessive force to operate.
User Interface Button Wear / Contamination
Symptom
Bosch EV charger’s status LEDs are flashing in an unusual pattern, but no explicit error code is shown; charging is disabled.
Non-Display Model Fault Indication (Generic Protection Trip)
Symptom
Bosch EV charger’s status LEDs indicate ready, but the vehicle only charges at a much lower current than expected.
Incorrect Current Limit Setting / Derating
Symptom
Bosch EV charger’s Wi‑Fi or app connection frequently drops, but charging still works.
Unstable Network Communication
Symptom
Bosch EV home charger has no power at all; no LEDs or display, and vehicle does not detect connection.
No AC Supply / Internal Power Supply Failure
Symptom
Water or condensation is visible inside or around the Bosch EV charger housing; unit may trip GFCI or stop charging.
Moisture Ingress / Enclosure Seal Failure
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| E101 |
Bosch EV home charger will not start charging; display shows E101 shortly after plugging in the vehicle.
|
Proximity Pilot (PP) / Control Pilot (CP) Communication Fault | View Details |
| E102 |
Bosch EV charger displays E102 and refuses to start charging when the vehicle is connected.
|
Ground Fault / Insulation Monitoring Trip | View Details |
| E103 |
Bosch EV home charger shows E103 and does not energize the relay; no charging current flows.
|
Contactor / Relay Welded or Stuck Fault | View Details |
| E104 |
Display shows E104 and charging stops or never starts; unit may briefly power the vehicle then shut down.
|
Overcurrent / Output Overload Protection Trip | View Details |
| E105 |
Bosch EV charger shows E105 and refuses to charge; may occur after a power outage or surge.
|
Input Overvoltage / Undervoltage Protection | View Details |
| E106 |
Charger displays E106 and will not start; internal fan may not run even when unit is warm.
|
Overtemperature / Cooling System Fault | View Details |
| E107 |
Bosch EV charger shows E107 and charging stops; may occur when using Wi‑Fi/app features.
|
Internal Communication / Firmware Fault | View Details |
| E108 |
Display shows E108; charger powers up but will not recognize that a vehicle is connected.
|
Vehicle Detection / Proximity Circuit Fault | View Details |
| E109 |
Bosch EV charger shows E109 and stops charging; may occur intermittently during a session.
|
Ground Continuity / Protective Earth Fault | View Details |
| E110 |
Charger displays E110 and will not start; often appears immediately at power-up.
|
Self-Test Failure / Internal Hardware Fault | View Details |
| E201 |
Bosch smart EV charger shows E201 and cannot connect to Wi‑Fi or Bosch app services.
|
Wi‑Fi Module Communication Error | View Details |
| E202 |
Bosch EV charger shows E202 when attempting scheduled charging; unit will not follow schedule.
|
Real-Time Clock / Scheduling Fault | View Details |
| E301 |
Bosch EV charger shows E301 and charging is disabled; often associated with RFID or access control features.
|
Authentication / RFID Reader Fault | View Details |
| E401 |
Bosch EV charger shows E401 and stops charging shortly after start; may coincide with utility demand response features.
|
External Control / Load Management Fault | View Details |
| E501 |
Bosch EV charger shows E501 and the display or LEDs do not behave normally.
|
User Interface / Display Communication Fault | View Details |
| E601 |
Bosch EV charger shows E601 and refuses to start; error appears after a lightning storm or surge event.
|
Surge Protection / MOV Failure | View Details |
| E701 |
Bosch EV charger shows E701 and charging is disabled; may be associated with DC leakage detection.
|
DC Residual Current Detection Fault | View Details |
| – |
Bosch EV charger cable or handle becomes unusually hot to the touch during charging.
|
Overheating Connector / High Contact Resistance | View Details |
| – |
Bosch EV charger clicks repeatedly (relay chatter) when a vehicle is plugged in, but charging does not start.
|
Unstable Contactor Drive / Pilot Negotiation Failure | View Details |
| – |
Bosch EV charger does not follow programmed charging schedules; it either charges immediately or not at all.
|
Scheduling / Timer Misconfiguration | View Details |
| – |
Bosch EV charger emits a loud humming or buzzing noise during operation.
|
Mechanical Vibration of Contactor or Transformer | View Details |
| – |
Bosch EV charger frequently causes nuisance trips of an upstream GFCI breaker or receptacle, even though no visible faults are present.
|
GFCI Coordination / Leakage Current Nuisance Trip | View Details |
| – |
Bosch EV charger intermittently stops charging mid-session without any error code; LEDs may briefly flash.
|
Intermittent Power Loss / Thermal Cutback | View Details |
| – |
Bosch EV charger makes a faint high-pitched whine during operation, especially at higher currents.
|
Switching Power Electronics Acoustic Noise | View Details |
| – |
Bosch EV charger powers up and shows ready, but the vehicle will not start charging and shows 'charging station error' with no code on the charger.
|
Control Pilot Signal Out of Tolerance | View Details |
| – |
Bosch EV charger randomly reboots during charging (LEDs go off and back on), causing brief interruptions.
|
Internal Power Supply Instability | View Details |
| – |
Bosch EV charger trips the upstream breaker or GFCI immediately when a vehicle is plugged in.
|
Short Circuit or Ground Fault on Output | View Details |
| – |
Bosch EV charger’s cable insulation shows cracks, cuts, or severe abrasion.
|
Output Cable Mechanical Damage | View Details |
| – |
Bosch EV charger’s enclosure is cracked or physically damaged after impact (e.g., vehicle bump).
|
Mechanical Enclosure Damage / Potential Ingress Risk | View Details |
| – |
Bosch EV charger’s front LED or display backlight is very dim or flickering, but charging still works.
|
User Interface Backlight Degradation | View Details |
| – |
Bosch EV charger’s front panel buttons are unresponsive or require excessive force to operate.
|
User Interface Button Wear / Contamination | View Details |
| – |
Bosch EV charger’s status LEDs are flashing in an unusual pattern, but no explicit error code is shown; charging is disabled.
|
Non-Display Model Fault Indication (Generic Protection Trip) | View Details |
| – |
Bosch EV charger’s status LEDs indicate ready, but the vehicle only charges at a much lower current than expected.
|
Incorrect Current Limit Setting / Derating | View Details |
| – |
Bosch EV charger’s Wi‑Fi or app connection frequently drops, but charging still works.
|
Unstable Network Communication | View Details |
| – |
Bosch EV home charger has no power at all; no LEDs or display, and vehicle does not detect connection.
|
No AC Supply / Internal Power Supply Failure | View Details |
| – |
Water or condensation is visible inside or around the Bosch EV charger housing; unit may trip GFCI or stop charging.
|
Moisture Ingress / Enclosure Seal Failure | View Details |
No matching codes found
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