Charging fails to start; vehicle shows 'Charging cable fault' and Tesla app logs CP_a004

Safety: Turn off the breaker before inspecting the Wall Connector handle or opening the unit.

• Inspect the handle: Examine the Tesla connector handle pins, especially the small pilot pin, for dirt, corrosion, or physical damage. Clean gently with a dry, soft brush; do not use solvents or lubricants.
• Check cable strain: Look for kinks, crushed sections, or severe bends near the handle or where the cable enters the Wall Connector. Internal pilot conductor damage often occurs at stress points.
• Dry the connector: If the handle has been exposed to rain or snow, allow it to dry thoroughly. Store the handle in the holster when not in use.
• Power cycle: Turn the breaker off for 2 minutes, then back on to reset the control board. Attempt charging again.
• If still faulty: The internal cable assembly or control board pilot circuit is likely defective. These are not field‑repairable; the Wall Connector or cable assembly must be replaced.