Is there an existing issue for this?

I searched existing open and closed issues and did not find a duplicate for KeyError: 'drive_state'.

Version of the Tesla component

3.25.5

Version of Home Assistant

2026.4.4

teslajsonpy version

Installed package metadata reports teslajsonpy 3.13.2, but teslajsonpy.__version__ reports 3.13.1.

Current behavior

All native Tesla Custom Integration entities for one vehicle became unavailable and stayed unavailable. TeslaMate-derived entities for the same vehicle continued to work.

The integration coordinator crashed on every poll because the Tesla vehicle data response did not include drive_state, while teslajsonpy.controller dereferenced response["drive_state"]["shift_state"] unguarded.

This happened while the vehicle was awake, plugged into a DC charger, and likely in/around service mode during charger experiments. It may be a Tesla partial-payload edge case rather than a normal parked/asleep response.

Expected behavior

A vehicle data response without drive_state should not crash the coordinator or make all Tesla entities unavailable. The integration/library should tolerate missing drive_state, keep processing the rest of the payload, and only leave drive-state-dependent entities unavailable if needed.

Relevant log

2026-05-16 20:42:56.806 ERROR (MainThread) [custom_components.tesla_custom] Unexpected error fetching tesla_custom data
Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/helpers/update_coordinator.py", line 426, in _async_refresh
    self.data = await self._async_update_data()
  File "/config/custom_components/tesla_custom/__init__.py", line 466, in _async_update_data
    data = await controller.update(
  File "/usr/local/lib/python3.14/site-packages/teslajsonpy/controller.py", line 851, in update
    result |= bool(await task)
  File "/usr/local/lib/python3.14/site-packages/teslajsonpy/controller.py", line 666, in _get_and_process_car_data
    != response["drive_state"]["shift_state"]
       ~~~~~~~~^^^^^^^^^^^^^^^
KeyError: 'drive_state'

Local hotfix that restored entities

I patched the installed teslajsonpy/controller.py locally to use:

drive_state = response.get("drive_state") or {}
shift_state = drive_state.get("shift_state")

and to fall back to time.time() if the drive_state timestamp is absent. After restarting Home Assistant, the native Tesla entities recovered immediately.

Additional notes

This is probably best fixed in teslajsonpy, but I am filing it here because the Home Assistant custom integration issue tracker points here and the user-visible failure is that all tesla_custom entities go unavailable.