Leviton EV Home Chargers Error Codes

E01

Charger will not start charging; front LEDs show solid red with E01 on display (or via app, if supported).

Ground Fault Detected

E02

Charger does not energize; display or status LEDs indicate E02 or a red fault LED pattern associated with overcurrent.

Output Overcurrent / Overload Protection Trip

E03

Charger refuses to start; display shows E03 or LEDs indicate a line voltage fault; unit may click but not charge.

Line Voltage Out of Range

E04

Charger indicates E04 or a fault LED pattern related to pilot signal; EV does not recognize that it is plugged in.

Pilot Signal Failure (Control Pilot Circuit Fault)

E05

Charger shows E05 or a fault pattern indicating relay/contactor failure; unit may click repeatedly or not at all.

Contactor / Relay Welded or Not Closing

E06

Charger displays E06 or indicates a temperature fault; charging stops unexpectedly, often during high current operation.

Overtemperature Shutdown

E07

Charger shows E07 or a fault pattern indicating ground continuity or equipment grounding issue; unit will not charge.

Ground Continuity / Protective Earth Fault

E08

Charger indicates E08 or a communication fault; smart features (Wi‑Fi/app) may fail and charging may be disabled.

Internal Communication / Logic Fault

E09

Charger shows E09 or a fault pattern indicating stuck button or user interface error; front buttons may be unresponsive.

User Interface / Keypad Fault

E10

Charger indicates E10 or a metering error; energy usage data may be unavailable and charging may be limited or disabled.

Internal Metering / Current Sensor Fault

E11

Charger shows E11 or a fault pattern indicating stuck relay test failure; self-test at power-up fails.

Self-Test / Contactor Feedback Fault

E12

Charger indicates E12 or a configuration error; unit may refuse to charge after installation or settings change.

Configuration / DIP Switch / Current Limit Error

E13

Charger shows E13 or a proximity detection fault; EV may lock/unlock connector erratically or refuse to start charge.

Proximity Pilot (PP) Circuit Fault

E14

Charger indicates E14 or an insulation monitoring fault; unit refuses to energize output.

Isolation / Insulation Resistance Fault

E15

Charger shows E15 or a timekeeping/RTC error; scheduled charging may fail or unit may not start at programmed times.

Real-Time Clock / Scheduling Fault

E16

Charger indicates E16 or a Wi‑Fi/Bluetooth module error; smart connectivity is unavailable, but basic charging may still work.

Wireless Communication Module Fault

E17

Charger shows E17 or a contactor pre-charge / inrush fault; unit may start then immediately stop charging.

Inrush / Pre-Charge Circuit Fault

E18

Charger indicates E18 or a lockout due to repeated ground fault or overcurrent events; unit will not reset normally.

Safety Lockout After Repeated Faults

E19

Charger shows E19 or a firmware integrity error; unit may not boot fully and LEDs may flash in a repeating pattern.

Firmware Corruption / Bootloader Fault

E20

Charger indicates E20 or a line frequency error; unit refuses to charge even though voltage appears normal.

Line Frequency Out of Range

Symptom

Charger completely dead: no LEDs, no display, no relay click when EV is plugged in.

No Power to EVSE

Symptom

Charger emits a loud humming or buzzing noise from the enclosure during operation.

Excessive Contactor or Transformer Hum

Symptom

Charger intermittently stops charging mid-session without any visible error; charging resumes after unplugging and replugging.

Intermittent Charge Interruption

Symptom

Charger powers up and shows ready, but will not start charging when plugged into any EV; no error code displayed.

Failure to Initiate Charge Without Error

Symptom

Charger trips the upstream GFCI or AFCI breaker or receptacle as soon as charging starts.

Nuisance Tripping of Upstream Protection

Symptom

Charger’s cable insulation is cracked, stiff, or discolored, especially near the handle or strain relief.

Aged or UV-Damaged Charge Cable

Symptom

Charger’s energy usage readings in the app are clearly inaccurate (too high or too low) compared to vehicle data.

Inaccurate Internal Metering

Symptom

Charger’s front cover is cracked or broken, exposing internal components to dust and moisture.

Damaged Enclosure / Impact Damage

Symptom

Charger’s front cover or mounting bracket is loose or rattling; unit may move when plugging/unplugging.

Mechanical Mounting / Enclosure Looseness

Symptom

Charger’s front enclosure or cable feels unusually hot to the touch during normal charging.

Overheating of Cable or Internal Connections

Symptom

Charger’s front LEDs do not light at all, but the unit still charges the vehicle normally.

LED Indicator Failure

Symptom

Charger’s internal fan (if equipped) runs loudly or fails to run, causing thermal derating or shutdown.

Cooling Fan Failure

Symptom

Charger’s internal GFCI test button (if present) does not trip the unit, or trips but will not reset.

Internal GFCI Self-Test Failure

Symptom

Charger’s scheduled charging does not start at the programmed time, but manual charging works.

Scheduling / Timer Misconfiguration

Symptom

Charger’s status LEDs flicker or dim erratically while charging, but charging continues.

LED Power / Low-Voltage Supply Instability

Symptom

Charger’s Wi‑Fi/app shows it is offline or unreachable, but local charging still works normally.

Network Connectivity Loss

Symptom

Visible arcing or sparking at the J1772 connector when plugging in or unplugging, sometimes accompanied by a burning smell.

Connector Arcing / Poor Contact

Symptom

Water or condensation visible inside the EVSE enclosure window or around the cable entry; charger may behave erratically.

Moisture Ingress into Enclosure