CP-A078
CP_a078_latchNotDisengagedCold
Also written as CP_A078 / CP A078 / CP_a078_latchNotDisengagedCold / cp_a078_latchnotdisengagedcold
Why does the exact Tesla alert ID matter?
Record the exact alert ID, including underscores, suffixes, and companion alerts. Tesla alerts that look similar can point to different modules, timestamps, and service procedures.
What does CP-A078 mean?
Tesla alert code in the Charge Port (CP) module. Latch is not disengaged but is expected to be disengaged, may be frozen info from manualCP_A078 Charge port latch does not read disengaged after being driven disengaged and cold weather mode is active Charge port latch reads disengaged Charge port latch may be frozen engaged, blocking cable insertion and removal Control pilot signal remains in state B1, indicating the charge station is connected to the vehicle but is not ready to charge the vehicle, for too long while a charge cable is plugged into the charge port (CP). Charging may not start or may be interrupted unexpectedly. info from manualCP_A066 Charge handle proximity is detected as connected to the charge port (CP) without charge handle button pressed, and control pilot signal is detected in state B1 for more than five seconds. Charge handle proximity is no longer detected as connected to the charge port (CP) without charge handle button pressed, or control pilot signal is no longer detected in state B1. Clears after five seconds if either of these conditions is true and a charge cable is still present. Otherwise, clears immediately. Charge port does not receive all expected CAN messages from the VCFRONT Charge port receives all expected CAN messages from the VCFRONT Charging may not start, charge port door and latch may not actuate, charge port LEDs may not turn on The CP has instigated a wake up event due to pilot Charge port detected PLC transmission failure The CHAdeMO adapter indicates it has faulted The CHAdeMO adapter reports it is faulted over SWCAN The CHAdeMO adapter reports via SWCAN that it is no longer faulted, or the adapter is unplugged
Original Description
Latch is not disengaged but is expected to be disengaged, may be frozen info from manualCP_A078 Charge port latch does not read disengaged after being driven disengaged and cold weather mode is active Charge port latch reads disengaged Charge port latch may be frozen engaged, blocking cable insertion and removal Control pilot signal remains in state B1, indicating the charge station is connected to the vehicle but is not ready to charge the vehicle, for too long while a charge cable is plugged into the charge port (CP). Charging may not start or may be interrupted unexpectedly. info from manualCP_A066 Charge handle proximity is detected as connected to the charge port (CP) without charge handle button pressed, and control pilot signal is detected in state B1 for more than five seconds. Charge handle proximity is no longer detected as connected to the charge port (CP) without charge handle button pressed, or control pilot signal is no longer detected in state B1. Clears after five seconds if either of these conditions is true and a charge cable is still present. Otherwise, clears immediately. Charge port does not receive all expected CAN messages from the VCFRONT Charge port receives all expected CAN messages from the VCFRONT Charging may not start, charge port door and latch may not actuate, charge port LEDs may not turn on The CP has instigated a wake up event due to pilot Charge port detected PLC transmission failure The CHAdeMO adapter indicates it has faulted The CHAdeMO adapter reports it is faulted over SWCAN The CHAdeMO adapter reports via SWCAN that it is no longer faulted, or the adapter is unplugged
Affected Tesla Models
What You May Notice
- Charge port alert: Latch is not disengaged but is expected to be disengaged, may be frozen info from manualCP_A078 Charge port latch does n
- Charging session may be interrupted or not starting as expected
- Charge port light flashing amber or red
How to Diagnose and Resolve
- 1 Unplug and re-plug the charge cable
- 2 Try a different charging cable or Supercharger stall
- 3 Reboot the vehicle and attempt to charge again
- 4 If "Latch is not disengaged but is expected to be dise" persists, contact Tesla Roadside Assistance
- 5 Schedule a Service Center visit if the problem continues
Severity Notes
CP-A078 is an Alert in the Charge Port system. Confirm the vehicle screen and Tesla app show no driving or charging restrictions, and schedule service if the alert returns.