E020
Rivian
EVSE–EV Communication Protocol Fault
Rivian charger shows E020; app indicates ‘Vehicle communication error’ even though Wi‑Fi is fine
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Incompatible or outdated vehicle firmware, Noise on pilot line, Faulty control board communication stack, Damaged pilot/proximity wiring in cable
How to Fix / Troubleshooting
Safety first: Do not attempt to modify vehicle-side wiring.
- Step 1 – Update vehicle firmware: Ensure your Rivian vehicle or other EV has the latest firmware installed.
- Step 2 – Test with another EV: If possible, plug in a different EV. If it charges normally, the issue is likely with the original vehicle.
- Step 3 – Inspect cable: Check for physical damage along the cable that could affect pilot/proximity conductors.
- Step 4 – Power cycle both ends: Reboot the vehicle (if supported) and power cycle the charger at the breaker.
Persistent E020 with multiple vehicles suggests a control board or cable communication fault requiring professional service.
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Repair Difficulty
Medium
3/5
Required Part
Rivian Wall Charger Pilot/Proximity Harness
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