Cadillac
Cadillac 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
The charger will not start charging; the vehicle shows ‘Charging Error’ and the charger display shows E01 shortly after plugging in.
Pilot Signal Communication Fault
E02
The charger display shows E02 and refuses to start; the vehicle may show ‘Check Power Source’ or ‘Charging Station Error’.
Ground Fault / Leakage Current Detected
E03
The charger shows E03 and does not energize; the vehicle does not begin charging and may not recognize the station.
Proximity Pilot / Latch Detection Fault
E04
The charger's enclosure vibrates or rattles when the contactor closes or during charging.
Contactor Welded or Contactor Feedback Fault
E05
The charger shows E05 and refuses to start; this may occur after a brownout or power surge.
Input Voltage Out of Range
E06
Charger display shows E06; the unit may start to charge briefly, then stop.
Overcurrent / Output Overload Fault
E07
The charger shows E07 and will not charge; this often appears during hot weather or after long charging sessions.
Overtemperature Protection Trip
E08
The charger display shows E08; the unit powers on but does not recognize when it is plugged into the vehicle.
Vehicle Detection / State Machine Fault
E09
The charger shows E09; charging stops unexpectedly and cannot be restarted until power is cycled.
Internal DC Power Supply Fault
E10
The charger display shows E10; the unit will not start charging and may show ‘Relay Test Failed’ in diagnostics (if accessible).
Self-Test / Contactor Self-Check Failure
E11
The charger shows E11; the Wi-Fi or network icon may flash; charging may still work intermittently.
Communication Module Fault (Wi-Fi / Cloud Connectivity)
E12
The charger display shows E12; the unit may not respond to RFID cards or app commands.
User Authentication / RFID Reader Fault
E13
The charger shows E13; charging stops when another large load in the home turns on (e.g., HVAC, oven).
Load Management / Derating Fault
E14
The charger display shows E14; the unit may not energize even though all wiring appears correct.
Ground Integrity / PE (Protective Earth) Fault
E15
The charger shows E15; the display may indicate ‘Internal Error’ or ‘Service Required’.
Firmware / Internal Logic Error
E16
Charger shows E16; charging stops when the cable is moved or flexed.
Intermittent Output Cable Fault
E17
Charger shows E17; the unit may charge at reduced current only, even when set to maximum.
Current Derating / Sensor Calibration Fault
E18
Charger shows E18; the display may be blank or frozen, with only a backlight or logo visible.
Display / HMI Communication Fault
E19
Charger shows E19; the unit may not recognize scheduled charging times or may ignore app commands.
Real-Time Clock / Scheduler Fault
E20
Charger shows E20; the unit may not detect that the connector is holstered or may not lock/unlock properly (if equipped with a holster sensor).
Holster / Dock Sensor Fault
Symptom
Charger causes nuisance tripping of a GFCI or AFCI breaker upstream, even though the charger itself shows no error.
Compatibility Issue with Upstream Protective Device
Symptom
Charger display is on but is very dim, flickering, or unreadable; charging may still function.
Display Backlight / Power Issue
Symptom
Charger emits a burning smell or visible smoke during or shortly after starting a charge.
Internal Component Overheating / Failure
Symptom
Charger makes loud clicking, popping, or crackling sounds when starting or during charging.
Abnormal Contactor / Electrical Arcing
Symptom
Charger trips the house breaker immediately or within a few seconds of starting a charge.
Short Circuit or Overcurrent on EVSE Circuit
Symptom
Charger’s RFID card reader does not respond; indicator does not blink or beep when a card is presented.
Non-Responsive RFID Reader
Symptom
Charger’s Wi-Fi or Bluetooth connection frequently drops; remote monitoring and control are unreliable.
Unstable Wireless Connectivity
Symptom
Charger’s cable insulation shows cracks, cuts, or severe abrasion.
Physical Cable Damage / Insulation Failure Risk
Symptom
Charger’s enclosure is loose, wobbles, or pulls away from the wall when the cable is handled.
Improper Mounting / Mechanical Instability
Symptom
The charger cable or connector becomes very hot to the touch during charging.
Overheating Connector / High Contact Resistance
Symptom
The charger enclosure is warm but not hot; the user notices a faint humming or buzzing sound during operation.
Normal Contactor Operation / Minor Vibration Noise
Symptom
The charger has no power at all; the display is blank and no indicator lights are on.
No AC Supply / Input Power Loss
Symptom
The charger powers on but will not start charging; the vehicle shows ‘Not Charging’ with no specific error code.
General EVSE-to-Vehicle Handshake Failure
Symptom
The charger starts charging but stops after a few minutes; no error code is displayed, or only a generic ‘Charging Stopped’ message appears.
Intermittent Charging Interruption
Symptom
The charger's scheduled charging does not start at the programmed time, but manual charging works.
Scheduling / Timer Misconfiguration
Symptom
Water or condensation visible on or inside the charger enclosure; intermittent operation in wet weather.
Moisture Ingress / Compromised Weather Sealing
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| E01 |
The charger will not start charging; the vehicle shows ‘Charging Error’ and the charger display shows E01 shortly after plugging in.
|
Pilot Signal Communication Fault | View Details |
| E02 |
The charger display shows E02 and refuses to start; the vehicle may show ‘Check Power Source’ or ‘Charging Station Error’.
|
Ground Fault / Leakage Current Detected | View Details |
| E03 |
The charger shows E03 and does not energize; the vehicle does not begin charging and may not recognize the station.
|
Proximity Pilot / Latch Detection Fault | View Details |
| E04 |
The charger's enclosure vibrates or rattles when the contactor closes or during charging.
|
Contactor Welded or Contactor Feedback Fault | View Details |
| E05 |
The charger shows E05 and refuses to start; this may occur after a brownout or power surge.
|
Input Voltage Out of Range | View Details |
| E06 |
Charger display shows E06; the unit may start to charge briefly, then stop.
|
Overcurrent / Output Overload Fault | View Details |
| E07 |
The charger shows E07 and will not charge; this often appears during hot weather or after long charging sessions.
|
Overtemperature Protection Trip | View Details |
| E08 |
The charger display shows E08; the unit powers on but does not recognize when it is plugged into the vehicle.
|
Vehicle Detection / State Machine Fault | View Details |
| E09 |
The charger shows E09; charging stops unexpectedly and cannot be restarted until power is cycled.
|
Internal DC Power Supply Fault | View Details |
| E10 |
The charger display shows E10; the unit will not start charging and may show ‘Relay Test Failed’ in diagnostics (if accessible).
|
Self-Test / Contactor Self-Check Failure | View Details |
| E11 |
The charger shows E11; the Wi-Fi or network icon may flash; charging may still work intermittently.
|
Communication Module Fault (Wi-Fi / Cloud Connectivity) | View Details |
| E12 |
The charger display shows E12; the unit may not respond to RFID cards or app commands.
|
User Authentication / RFID Reader Fault | View Details |
| E13 |
The charger shows E13; charging stops when another large load in the home turns on (e.g., HVAC, oven).
|
Load Management / Derating Fault | View Details |
| E14 |
The charger display shows E14; the unit may not energize even though all wiring appears correct.
|
Ground Integrity / PE (Protective Earth) Fault | View Details |
| E15 |
The charger shows E15; the display may indicate ‘Internal Error’ or ‘Service Required’.
|
Firmware / Internal Logic Error | View Details |
| E16 |
Charger shows E16; charging stops when the cable is moved or flexed.
|
Intermittent Output Cable Fault | View Details |
| E17 |
Charger shows E17; the unit may charge at reduced current only, even when set to maximum.
|
Current Derating / Sensor Calibration Fault | View Details |
| E18 |
Charger shows E18; the display may be blank or frozen, with only a backlight or logo visible.
|
Display / HMI Communication Fault | View Details |
| E19 |
Charger shows E19; the unit may not recognize scheduled charging times or may ignore app commands.
|
Real-Time Clock / Scheduler Fault | View Details |
| E20 |
Charger shows E20; the unit may not detect that the connector is holstered or may not lock/unlock properly (if equipped with a holster sensor).
|
Holster / Dock Sensor Fault | View Details |
| – |
Charger causes nuisance tripping of a GFCI or AFCI breaker upstream, even though the charger itself shows no error.
|
Compatibility Issue with Upstream Protective Device | View Details |
| – |
Charger display is on but is very dim, flickering, or unreadable; charging may still function.
|
Display Backlight / Power Issue | View Details |
| – |
Charger emits a burning smell or visible smoke during or shortly after starting a charge.
|
Internal Component Overheating / Failure | View Details |
| – |
Charger makes loud clicking, popping, or crackling sounds when starting or during charging.
|
Abnormal Contactor / Electrical Arcing | View Details |
| – |
Charger trips the house breaker immediately or within a few seconds of starting a charge.
|
Short Circuit or Overcurrent on EVSE Circuit | View Details |
| – |
Charger’s RFID card reader does not respond; indicator does not blink or beep when a card is presented.
|
Non-Responsive RFID Reader | View Details |
| – |
Charger’s Wi-Fi or Bluetooth connection frequently drops; remote monitoring and control are unreliable.
|
Unstable Wireless Connectivity | View Details |
| – |
Charger’s cable insulation shows cracks, cuts, or severe abrasion.
|
Physical Cable Damage / Insulation Failure Risk | View Details |
| – |
Charger’s enclosure is loose, wobbles, or pulls away from the wall when the cable is handled.
|
Improper Mounting / Mechanical Instability | View Details |
| – |
The charger cable or connector becomes very hot to the touch during charging.
|
Overheating Connector / High Contact Resistance | View Details |
| – |
The charger enclosure is warm but not hot; the user notices a faint humming or buzzing sound during operation.
|
Normal Contactor Operation / Minor Vibration Noise | View Details |
| – |
The charger has no power at all; the display is blank and no indicator lights are on.
|
No AC Supply / Input Power Loss | View Details |
| – |
The charger powers on but will not start charging; the vehicle shows ‘Not Charging’ with no specific error code.
|
General EVSE-to-Vehicle Handshake Failure | View Details |
| – |
The charger starts charging but stops after a few minutes; no error code is displayed, or only a generic ‘Charging Stopped’ message appears.
|
Intermittent Charging Interruption | View Details |
| – |
The charger's scheduled charging does not start at the programmed time, but manual charging works.
|
Scheduling / Timer Misconfiguration | View Details |
| – |
Water or condensation visible on or inside the charger enclosure; intermittent operation in wet weather.
|
Moisture Ingress / Compromised Weather Sealing | View Details |
No matching codes found
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