Webasto
Webasto 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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E01
Charging session will not start; vehicle shows ‘charging error’ and Webasto charger status LED turns solid red with E01 on display or in app.
Proximity Pilot (PP) / Control Pilot (CP) Signal Fault
E02
Charger immediately stops charging after plug-in; red LED and E02 indicating ground fault or residual current device (RCD) trip.
DC Leakage / Ground Fault Detection Trip
E03
Charger does not energize; display or app shows E03 overvoltage/undervoltage; charging stops intermittently during grid fluctuations.
AC Supply Voltage Out of Range
E04
Charging stops; charger shows E04 indicating overtemperature; unit may resume after cooling.
Internal Overtemperature Protection Trip
E05
Charger refuses to start; E05 or ‘PE error’ displayed; red LED; installation ground fault indicated.
Protective Earth (PE) Conductor Fault
E06
Charging stops or will not start; E06 indicates contactor or relay fault; audible clicking may be absent or repeated.
Main Contactor / Relay Failure
E07
Charger shows E07 or ‘CP short to ground’; charging cannot start.
Control Pilot Short to Protective Earth
E08
Charger displays E08 indicating stuck relay/contactor; unit may refuse to start or stop charging.
Contactor Welded Closed / Stuck Contacts
E09
Charger shows E09 or ‘phase error’; three-phase Webasto unit will not start or only charges at reduced power.
Phase Loss / Phase Sequence Error
E10
Charger indicates E10 or ‘lock error’; cable locking mechanism fails to engage or release; connector may be stuck in the socket.
Cable Locking Actuator Failure
E11
Charger shows E11 or ‘RFID error’; unit does not recognize RFID cards or fobs; charging cannot be authorized.
RFID Reader Communication Fault
E12
Charger displays E12 or ‘communication error’; Webasto unit cannot connect to backend, app, or local network; smart features disabled.
Network / Backend Communication Failure
E13
Charger shows E13 or ‘meter error’; energy metering or load management features fail; charging may be disabled or limited.
Internal Energy Meter / Current Sensor Fault
E14
Charger indicates E14 or ‘firmware error’; unit may reboot repeatedly or refuse to start charging.
Firmware Corruption / Software Boot Failure
E15
Charger shows E15 or ‘overcurrent’; charging stops shortly after start; breaker may trip.
Output Overcurrent Protection Trip
E16
Charger displays E16 or ‘isolation error’; unit refuses to start charging for safety reasons.
Insulation Monitoring Fault
E17
Charger shows E17 or ‘PEN fault’ in TN‑C‑S systems; unit disables charging.
PEN Conductor Monitoring Fault (for certain markets)
E18
Charger indicates E18 or ‘load management error’; unit may limit current to minimum or refuse to start.
Dynamic Load Management Communication Fault
E19
Charger shows E19 or ‘internal fault’; generic hardware error; unit will not charge.
Generic Internal Hardware Fault
E20
Charger displays E20 or ‘vehicle error’; EV does not accept charge even though charger appears ready.
Vehicle-Side Charging Communication Error
Symptom
Charging is very slow compared to expected rate; Webasto charger and vehicle both show charging but at reduced kW.
Reduced Charging Current / Derating
Symptom
Water or condensation visible inside or around the Webasto charger housing; occasional charging faults in wet weather.
Moisture Ingress / Compromised Enclosure Sealing
Symptom
Webasto charger cannot be found by the mobile app during setup; Wi‑Fi SSID of charger not visible; no explicit error code on unit.
Wi‑Fi Access Point / Radio Failure
Symptom
Webasto charger emits a burning smell or visible smoke during or after a charging session.
Internal Overheating / Component Failure
Symptom
Webasto charger emits loud humming, buzzing, or clicking noises during operation beyond normal contactor sounds.
Mechanical Vibration / Electromagnetic Noise from Contactor or Transformer
Symptom
Webasto charger frequently loses connection to the cloud or app, but local charging continues normally.
Unstable Cloud / Backend Connectivity
Symptom
Webasto charger intermittently stops charging mid‑session without any visible error code; charging resumes after unplugging and replugging.
Intermittent Pilot or Power Interruption
Symptom
Webasto charger or cable becomes excessively hot during normal charging; plastic around plug or socket may discolor over time.
Overheating Connector / High Contact Resistance
Symptom
Webasto charger powers on but vehicle does not start charging; LEDs remain in ‘ready’ state and EV shows ‘not charging’ with no error code.
Control Pilot Signaling Out of Tolerance
Symptom
Webasto charger trips the household RCD or breaker as soon as charging starts, but no specific charger error code is shown.
Nuisance Tripping / Earth Leakage or Overcurrent
Symptom
Webasto charger’s cable cannot be neatly stored; integrated cable hook or holder is broken or loose.
Cable Management Hardware Damage
Symptom
Webasto charger’s front housing or mounting bracket feels loose or wobbly on the wall.
Mechanical Mounting Failure
Symptom
Webasto charger’s front LEDs or display flicker or are very dim, but charging may still function intermittently.
Low-Voltage Control Supply Instability
Symptom
Webasto charger’s internal fan (if equipped) runs loudly or continuously, even at low load or when idle.
Cooling Fan Control or Sensor Fault
Symptom
Webasto charger’s RFID reader area is unresponsive; no beep or LED change when presenting authorized cards, but no RFID-specific error code is shown.
RFID Antenna or Reader Board Failure
Symptom
Webasto charger’s scheduled charging or smart features (e.g., solar surplus charging) do not work, but manual charging is fine.
Configuration / Scheduler Logic Fault
Symptom
Webasto charger’s Type 2 plug is difficult to remove from the vehicle; feels stuck even after charging stops.
Sticking Lock Mechanism / Thermal Expansion
Symptom
Webasto charger’s Type 2 plug will not fully insert into the vehicle inlet or requires excessive force.
Mechanical Misalignment / Obstruction in Connector
Symptom
Webasto EV home charger has no power at all; no LEDs, no display, and no response when plugging in vehicle.
No AC Supply / Internal Power Supply Failure
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| E01 |
Charging session will not start; vehicle shows ‘charging error’ and Webasto charger status LED turns solid red with E01 on display or in app.
|
Proximity Pilot (PP) / Control Pilot (CP) Signal Fault | View Details |
| E02 |
Charger immediately stops charging after plug-in; red LED and E02 indicating ground fault or residual current device (RCD) trip.
|
DC Leakage / Ground Fault Detection Trip | View Details |
| E03 |
Charger does not energize; display or app shows E03 overvoltage/undervoltage; charging stops intermittently during grid fluctuations.
|
AC Supply Voltage Out of Range | View Details |
| E04 |
Charging stops; charger shows E04 indicating overtemperature; unit may resume after cooling.
|
Internal Overtemperature Protection Trip | View Details |
| E05 |
Charger refuses to start; E05 or ‘PE error’ displayed; red LED; installation ground fault indicated.
|
Protective Earth (PE) Conductor Fault | View Details |
| E06 |
Charging stops or will not start; E06 indicates contactor or relay fault; audible clicking may be absent or repeated.
|
Main Contactor / Relay Failure | View Details |
| E07 |
Charger shows E07 or ‘CP short to ground’; charging cannot start.
|
Control Pilot Short to Protective Earth | View Details |
| E08 |
Charger displays E08 indicating stuck relay/contactor; unit may refuse to start or stop charging.
|
Contactor Welded Closed / Stuck Contacts | View Details |
| E09 |
Charger shows E09 or ‘phase error’; three-phase Webasto unit will not start or only charges at reduced power.
|
Phase Loss / Phase Sequence Error | View Details |
| E10 |
Charger indicates E10 or ‘lock error’; cable locking mechanism fails to engage or release; connector may be stuck in the socket.
|
Cable Locking Actuator Failure | View Details |
| E11 |
Charger shows E11 or ‘RFID error’; unit does not recognize RFID cards or fobs; charging cannot be authorized.
|
RFID Reader Communication Fault | View Details |
| E12 |
Charger displays E12 or ‘communication error’; Webasto unit cannot connect to backend, app, or local network; smart features disabled.
|
Network / Backend Communication Failure | View Details |
| E13 |
Charger shows E13 or ‘meter error’; energy metering or load management features fail; charging may be disabled or limited.
|
Internal Energy Meter / Current Sensor Fault | View Details |
| E14 |
Charger indicates E14 or ‘firmware error’; unit may reboot repeatedly or refuse to start charging.
|
Firmware Corruption / Software Boot Failure | View Details |
| E15 |
Charger shows E15 or ‘overcurrent’; charging stops shortly after start; breaker may trip.
|
Output Overcurrent Protection Trip | View Details |
| E16 |
Charger displays E16 or ‘isolation error’; unit refuses to start charging for safety reasons.
|
Insulation Monitoring Fault | View Details |
| E17 |
Charger shows E17 or ‘PEN fault’ in TN‑C‑S systems; unit disables charging.
|
PEN Conductor Monitoring Fault (for certain markets) | View Details |
| E18 |
Charger indicates E18 or ‘load management error’; unit may limit current to minimum or refuse to start.
|
Dynamic Load Management Communication Fault | View Details |
| E19 |
Charger shows E19 or ‘internal fault’; generic hardware error; unit will not charge.
|
Generic Internal Hardware Fault | View Details |
| E20 |
Charger displays E20 or ‘vehicle error’; EV does not accept charge even though charger appears ready.
|
Vehicle-Side Charging Communication Error | View Details |
| – |
Charging is very slow compared to expected rate; Webasto charger and vehicle both show charging but at reduced kW.
|
Reduced Charging Current / Derating | View Details |
| – |
Water or condensation visible inside or around the Webasto charger housing; occasional charging faults in wet weather.
|
Moisture Ingress / Compromised Enclosure Sealing | View Details |
| – |
Webasto charger cannot be found by the mobile app during setup; Wi‑Fi SSID of charger not visible; no explicit error code on unit.
|
Wi‑Fi Access Point / Radio Failure | View Details |
| – |
Webasto charger emits a burning smell or visible smoke during or after a charging session.
|
Internal Overheating / Component Failure | View Details |
| – |
Webasto charger emits loud humming, buzzing, or clicking noises during operation beyond normal contactor sounds.
|
Mechanical Vibration / Electromagnetic Noise from Contactor or Transformer | View Details |
| – |
Webasto charger frequently loses connection to the cloud or app, but local charging continues normally.
|
Unstable Cloud / Backend Connectivity | View Details |
| – |
Webasto charger intermittently stops charging mid‑session without any visible error code; charging resumes after unplugging and replugging.
|
Intermittent Pilot or Power Interruption | View Details |
| – |
Webasto charger or cable becomes excessively hot during normal charging; plastic around plug or socket may discolor over time.
|
Overheating Connector / High Contact Resistance | View Details |
| – |
Webasto charger powers on but vehicle does not start charging; LEDs remain in ‘ready’ state and EV shows ‘not charging’ with no error code.
|
Control Pilot Signaling Out of Tolerance | View Details |
| – |
Webasto charger trips the household RCD or breaker as soon as charging starts, but no specific charger error code is shown.
|
Nuisance Tripping / Earth Leakage or Overcurrent | View Details |
| – |
Webasto charger’s cable cannot be neatly stored; integrated cable hook or holder is broken or loose.
|
Cable Management Hardware Damage | View Details |
| – |
Webasto charger’s front housing or mounting bracket feels loose or wobbly on the wall.
|
Mechanical Mounting Failure | View Details |
| – |
Webasto charger’s front LEDs or display flicker or are very dim, but charging may still function intermittently.
|
Low-Voltage Control Supply Instability | View Details |
| – |
Webasto charger’s internal fan (if equipped) runs loudly or continuously, even at low load or when idle.
|
Cooling Fan Control or Sensor Fault | View Details |
| – |
Webasto charger’s RFID reader area is unresponsive; no beep or LED change when presenting authorized cards, but no RFID-specific error code is shown.
|
RFID Antenna or Reader Board Failure | View Details |
| – |
Webasto charger’s scheduled charging or smart features (e.g., solar surplus charging) do not work, but manual charging is fine.
|
Configuration / Scheduler Logic Fault | View Details |
| – |
Webasto charger’s Type 2 plug is difficult to remove from the vehicle; feels stuck even after charging stops.
|
Sticking Lock Mechanism / Thermal Expansion | View Details |
| – |
Webasto charger’s Type 2 plug will not fully insert into the vehicle inlet or requires excessive force.
|
Mechanical Misalignment / Obstruction in Connector | View Details |
| – |
Webasto EV home charger has no power at all; no LEDs, no display, and no response when plugging in vehicle.
|
No AC Supply / Internal Power Supply Failure | View Details |
No matching codes found
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