Rivian charger shows E012; app indicates ‘Isolation fault detected’ and charging is disabled

Safety first: Isolation faults can indicate a shock hazard. Do not use the charger until the issue is resolved.

• Step 1 – Inspect enclosure integrity: Check that all screws are present and the gasketed cover is fully seated. Look for cracks in the housing or conduit entries that are not sealed.
• Step 2 – Check for visible moisture: With power OFF and cover removed, look for condensation, water tracks, or corrosion on terminals and the control board. If present, allow the unit to dry completely (24–48 hours in a dry environment).
• Step 3 – Inspect cable entry: Ensure the strain relief and conduit fittings are tight and properly sealed to prevent water ingress.
• Step 4 – Cable inspection: Examine the output cable for deep cuts or crushed areas that could compromise insulation.

If E012 remains after drying and inspection, a professional should perform insulation resistance testing and likely replace the cable or control board.