MyTeslaMate
CP family

CP_w135_sdpAttemptsFailed

Charging equipment communication error

What does the CP_w135_sdpAttemptsFailed alert mean?

The combined charging system (CCS) charging session is not started due to communication failures during the electric vehicle supply equipment (EVSE) discovery protocol (SDP).

What you'll see in your Tesla

  • Charging equipment communication error
  • Unplug via Mobile App or Touchscreen and retry

What triggers it

The CP ECU detects that the SDP failed an unexpected number of times.

When it clears

The charge port (CP) electronic control unit (ECU) detects that the charge cable was disconnected, or an SDP attempt succeeded.

Potential impact

Charging does not start.

Affected models

Model S 2012-2020 Model X 2015-2020

Track your Tesla's alerts automatically

Alerts like this reach MyTeslaMate through your car's Tesla telemetry API. MyTeslaMate logs every alert your Tesla reports and turns it into readable history and real-time notifications — hosted TeslaMate with no server to run.