CP family
CP_a135_sdpAttemptsFailed
Charging equipment communication error
What does the CP_a135_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
Cybertruck
Model 3 2017-2023
Model 3 2024+
Model S 2021+
Model X 2021+
Model Y
Model Y 2025+
Semitruck
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