When your EV charger displays an error code or refuses to charge, it can be frustrating. This comprehensive guide covers error codes from all major EV charger brands and provides step-by-step solutions to get you back to charging.

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Universal Quick Fixes

Before diving into specific error codes, try these steps—they resolve 80% of charging issues:

  1. Power cycle the charger: Turn off the breaker for 30 seconds, then back on
  2. Unplug and replug: Disconnect from vehicle, wait 10 seconds, reconnect firmly
  3. Check the vehicle: Ensure the car is unlocked and in "Park"
  4. Inspect the connector: Look for debris, moisture, or damaged pins
  5. Restart the vehicle: Some EVs need a reboot to clear charging faults

Jump to Your Charger Brand

Tesla Wall Connector Error Codes

Tesla Wall Connectors use LED color codes to indicate status and errors. Here's what each pattern means:

Tesla Wall Connector LED Codes

Solid Red

Ground fault detected. The charger has detected a ground fault condition that could indicate a safety hazard.
How to Fix:
  1. Turn off the breaker and wait 30 seconds
  2. Check all wiring connections at the Wall Connector
  3. Inspect the vehicle's charge port for moisture or debris
  4. If outdoor installation, check for water intrusion
  5. If error persists, the GFCI circuit inside may be faulty—contact Tesla or an electrician

Blinking Red (1 blink)

High temperature detected. The charger or vehicle is too hot to charge safely.
How to Fix:
  1. Wait for the charger and vehicle to cool down
  2. Ensure adequate ventilation around the Wall Connector
  3. If direct sunlight exposure, consider a shade or relocating the unit
  4. Check that wire gauge matches the installation distance (undersized wire causes heat)

Blinking Red (2 blinks)

Wall Connector cannot communicate with the vehicle.
How to Fix:
  1. Unplug, wait 10 seconds, and reconnect the charging cable
  2. Clean the connector pins and vehicle charge port
  3. Try a different vehicle if possible to isolate the issue
  4. Restart the vehicle's infotainment system

Blinking Red (3 blinks)

Relay test failure. Internal component fault.
How to Fix:
  1. Power cycle the Wall Connector (breaker off/on)
  2. If persists, the internal relay may need replacement
  3. Contact Tesla for warranty service or replacement

Blinking Red (4 blinks)

No ground connection detected.
How to Fix:
  1. Turn off the breaker
  2. Check the ground wire connection at the Wall Connector
  3. Verify ground connection at the electrical panel
  4. Use a multimeter to verify continuity to ground

Blinking Red (5 blinks)

Power sharing communication error (for multi-unit installations).
How to Fix:
  1. Check the power sharing cable connections between units
  2. Verify all Wall Connectors are on the same firmware version
  3. Reset all units by turning off breakers simultaneously

Blinking Red (6 blinks)

Excessive voltage. Input voltage is too high.
How to Fix:
  1. Use a multimeter to check voltage at the Wall Connector (should be 220-240V)
  2. Contact your utility if voltage exceeds 250V consistently
  3. The Wall Connector protects itself from overvoltage—this is a power quality issue

ChargePoint Home Flex Error Codes

ChargePoint uses a combination of LED colors and app notifications. The light ring around the unit provides visual feedback.

ChargePoint Home Flex Status Lights

Solid Red Ring

Fault condition. Ground fault, stuck relay, or other hardware issue.
How to Fix:
  1. Check the ChargePoint app for a specific error message
  2. Power cycle the unit (breaker off 30 seconds, then on)
  3. Inspect connections at the terminal block inside the unit
  4. If the app shows "Ground Fault," check for moisture in the charge port

Blinking Yellow/Amber

WiFi disconnected or firmware update in progress.
How to Fix:
  1. If updating, wait for completion (up to 30 minutes)
  2. Check your WiFi network is operational
  3. Move closer to the router or add a WiFi extender
  4. Re-pair the charger in the app if needed

App: "Charging Interrupted"

The vehicle stopped the charging session unexpectedly.
How to Fix:
  1. Check if the vehicle reached its charge limit
  2. Verify the vehicle's scheduled charging settings aren't interfering
  3. Look for error messages on the vehicle's screen
  4. Ensure the charge port latch is engaging properly

App: "Unable to Communicate"

The charger lost connection to the vehicle mid-session.
How to Fix:
  1. Disconnect and firmly reconnect the charging cable
  2. Clean connector pins with a dry cloth
  3. Check for damaged pins on the J1772 connector
  4. Try a different amperage setting in the app

JuiceBox Error Codes

JuiceBox chargers display status on the front LED panel and send notifications through the JuiceNet app.

JuiceBox LED Panel Indicators

Red "FAULT" Display

General fault condition detected.
How to Fix:
  1. Note any error code number displayed
  2. Power cycle the unit
  3. Check the JuiceNet app for detailed fault information
  4. Ensure the charging connector is fully seated in your vehicle

Fault Code: E01

Ground fault detected.
How to Fix:
  1. Inspect the vehicle charge port for moisture or debris
  2. Check the connector for visible damage
  3. If installed outdoors, check for water intrusion
  4. Power cycle and attempt to charge again

Fault Code: E02

Stuck relay or contactor failure.
How to Fix:
  1. Turn off the breaker for 2 minutes, then back on
  2. Listen for a clicking sound when the charger powers up
  3. If no click or error persists, internal components may need service
  4. Contact Enel X Way support for warranty evaluation

Fault Code: E07

Over-temperature condition.
How to Fix:
  1. Allow the unit to cool down before retrying
  2. Ensure adequate ventilation around the charger
  3. If in direct sunlight, consider a shade solution
  4. Check wire gauge—undersized wiring causes excess heat

No WiFi Icon / Blinking

WiFi connection lost or never established.
How to Fix:
  1. Ensure your router is broadcasting 2.4GHz (JuiceBox doesn't support 5GHz)
  2. Move the charger closer to the router during setup
  3. Factory reset the WiFi settings and re-pair in the app
  4. Consider a WiFi range extender for garage installations

ClipperCreek Error Codes

ClipperCreek chargers use simple LED indicators without smart connectivity.

ClipperCreek HCS/LCS Series LED Codes

Red LED (Solid)

Ground fault or internal fault detected.
How to Fix:
  1. Disconnect the vehicle and power cycle the charger
  2. Inspect the connector and vehicle port for damage or moisture
  3. If outdoor installed, check for water intrusion in the unit
  4. Contact ClipperCreek support if error persists

Flashing Red/Green Alternating

Ventilation required—vehicle is requesting ventilated charging area.
How to Fix:
  1. This is rare with modern EVs (mostly affects older LEAFs)
  2. Ensure the charging area has adequate ventilation
  3. Check if your vehicle has a ventilation requirement setting

No LED Illumination

No power to unit or internal failure.
How to Fix:
  1. Verify the circuit breaker is on
  2. Check for voltage at the unit with a multimeter
  3. Inspect wire connections inside the unit
  4. If power is present but no LED, the unit likely needs replacement

Grizzl-E Error Codes

Grizzl-E chargers use a multi-color LED to indicate status.

Grizzl-E LED Indicators

Red LED

Error or fault condition.
How to Fix:
  1. Power cycle the unit (30-second breaker off/on)
  2. Disconnect and reconnect the vehicle
  3. Check the connector for debris or damage
  4. Grizzl-E is known for reliability—persistent red LED may indicate internal failure

Blinking Yellow/Amber

Waiting for vehicle or connection issue.
How to Fix:
  1. Ensure the vehicle is unlocked and ready to charge
  2. Firmly seat the connector in the vehicle port
  3. Check if the vehicle has scheduled charging enabled

Vehicle-Side Error Codes

Sometimes the issue is with your EV, not the charger. Here are common vehicle charging errors:

Common Vehicle Charging Errors

"Unable to Charge" / "Charge Port Error"

The vehicle's charge port or onboard charger detected an issue.
How to Fix:
  1. Inspect the charge port for debris, ice, or physical damage
  2. Try a different charging station to isolate the issue
  3. Check if the charge port door is fully open
  4. Restart the vehicle and try again

"Charging Stopped - See Manual"

The vehicle's battery management system stopped charging.
How to Fix:
  1. Check if battery is too hot or too cold (wait for temperature to normalize)
  2. Verify you haven't reached a charge limit setting
  3. Look for specific diagnostic codes in the vehicle's settings
  4. If recurring, schedule a service appointment

"12V Battery Low"

The 12V auxiliary battery is depleted, preventing charging.
How to Fix:
  1. Jump-start the 12V battery using another vehicle or jump pack
  2. Once the vehicle is "awake," charging should work normally
  3. Consider replacing the 12V battery if this recurs

Generic J1772 Error Handling

All Level 2 chargers use the J1772 standard, which has built-in fault detection. Here are universal troubleshooting steps:

J1772 Communication Basics: The J1772 connector uses a pilot signal to communicate between charger and vehicle. Issues with this signal cause most "unable to charge" errors. The pilot wire is the small pin in the connector.

Universal Troubleshooting Steps

  1. Clean the connector: Use a dry cloth to clean the J1772 pins. Never use water or solvents.
  2. Inspect for damage: Look for bent pins, cracks, or burn marks on the connector.
  3. Check the latch: The connector should click firmly into place. A loose connection causes errors.
  4. Try a different vehicle: This isolates whether the issue is charger or vehicle-side.
  5. Check power supply: Use a multimeter to verify 240V at the charger.
  6. Reduce amperage: If your charger allows, try a lower amperage setting.
  7. Factory reset: Many smart chargers have a reset procedure—check your manual.
When to Call a Professional: Contact an electrician if you see burning or melting, smell electrical burning, experience tripped breakers repeatedly, or measure incorrect voltage. These indicate potentially dangerous wiring issues.

Frequently Asked Questions

Why does my EV charger keep tripping the breaker?
Breaker trips usually indicate: (1) undersized breaker for the load—ensure you have the correct size per charger specs, (2) loose connections creating heat, (3) a faulty breaker that needs replacement, or (4) a ground fault in the charger or wiring. Have an electrician inspect if this happens repeatedly.
My charger works sometimes but not others. Why?
Intermittent issues often stem from: (1) loose connections that move when the cable is handled, (2) WiFi-dependent features failing when signal is weak, (3) temperature-related issues (too hot or cold), or (4) utility voltage fluctuations. Keep a log of when it fails to identify patterns.
Can I fix EV charger errors myself or do I need an electrician?
Many issues like power cycling, connector cleaning, and WiFi reconnection are safe DIY fixes. However, anything involving opening the charger housing, working in the electrical panel, or addressing repeated breaker trips should be handled by a licensed electrician. When in doubt, call a pro.
How do I know if the problem is my charger or my car?
The best test is trying a different charger with your vehicle (like a public station) or a different vehicle with your charger. If your car charges fine elsewhere, the home charger is suspect. If the charger works with another EV, your vehicle may have an issue.

Still Having Issues?

Check our detailed troubleshooting guides for specific problems or browse recommended replacement chargers.

View All Troubleshooting Guides

Conclusion

Most EV charger errors have straightforward solutions. Start with the basics—power cycling, reconnecting, and checking for debris—before assuming hardware failure. When smart chargers show errors, the companion app usually provides more detail than the LED alone.

Keep this guide bookmarked for future reference, and remember: a well-installed, quality charger rarely fails. If you're experiencing frequent issues, it may be worth investing in a more reliable unit like the ChargePoint Home Flex or having your installation inspected by a qualified electrician.