Events/get_dtc_events

`get_dtc_events`token required

Returns Diagnostic Trouble Code (DTC) events for a list of vehicles, groups or licenses over a window of up to 72 hours.

Try in playground

POST/api— body field action.name = "get_dtc_events"

Parameters

Name	Type	Required	Description
`license_list`	string	optional	Comma-separated list of license plates. At least one of license_list/group_list/vehicle_id_list is required.e.g. `AB-123-CD,EF-456-GH`
`group_list`	string	optional	Comma-separated list of group ids.e.g. `10,11`
`vehicle_id_list`	string	optional	Comma-separated list of vehicle ids.e.g. `555,556,557`
`from_date`	date	optional	Start of date range. Defaults to `to_date - 3 days` when omitted.e.g. `2026-04-26T00:00:00Z`
`to_date`	date	optional	End of date range. Defaults to now when omitted.e.g. `2026-04-27T00:00:00Z`

Pagination

This action is paginated. The two parameters below are accepted on every call (both optional); omitting them yields page 1 with 100 rows. The response carries a pagination envelope alongside data; iterate while has_more === true.

page, page_size and has_more are present on every paginated response. total_count and total_pages are returned only by some actions — treat them as optional and drive iteration from has_more rather than from a page count worked out in advance.

Name	Type	Required	Description
`page_number`	number	optional	1-based page index. Defaults to 1 if omitted. Page 1 pins a snapshot for stateful actions (events, telemetry) — subsequent pages reuse that snapshot until the session expires (~30 minutes).e.g. `1`
`page_size`	number	optional	Rows per page. Defaults to 2000, which is also the maximum — larger values are silently capped to 2000, and a response of exactly 2000 rows usually means there are more pages. For stateful actions (events, telemetry) only the value sent with page 1 is honored, because later pages reuse the size pinned by the snapshot; stateless actions read it on every request.e.g. `2000`

Iterate every page

curl

# Iterate every page until pagination.has_more is false.
# page_size "100" is a deliberate small page so the loop is visible — the
# default is 2000, which is also the maximum. Raise it to fetch fewer,
# larger pages; you still stop on has_more either way.
# Requires: jq (https://stedolan.github.io/jq/).
page=1
while :; do
  body=$(curl -s -X POST 'https://private.develop-1.questar.io/v2/private-questar-units/api' \
    -H 'Content-Type: application/json' \
    -H 'Authorization: Bearer YOUR_TOKEN' \
    -d '{"action":{"name":"get_dtc_events","parameters":[{"license_list":"AB-123-CD,EF-456-GH","group_list":"10,11","vehicle_id_list":"555,556,557","from_date":"2026-04-26T00:00:00Z","to_date":"2026-04-27T00:00:00Z","page_number":"'$page'","page_size":"100"}]}}')
  echo "$body" | jq '.response.properties.data[]'
  has_more=$(echo "$body" | jq -r '.response.properties.pagination.has_more // false')
  [ "$has_more" = "true" ] || break
  page=$((page + 1))
done

Page 1 pins a snapshot for stateful actions (events, telemetry). If the session expires (~30 min) the API returns action_value="3" with description pagination_session_expired — restart from page_number=1.

Notes

env_id is taken from the session only — no parameter override. At least one of `license_list`, `group_list`, or `vehicle_id_list` is required. Date defaults: `to_date` defaults to now and `from_date` defaults to `to_date - 3 days`. Window > 72 hours returns action_value '1'. `recommendation`, `duration`, `first_occured`, `last_occured` are returned as empty strings (no PG analog).

Request

curl

curl -X POST 'https://private.develop-1.questar.io/v2/private-questar-units/api' \
  -H 'Content-Type: application/json' \
  -H 'Authorization: Bearer YOUR_TOKEN' \
  --data '{"action":{"name":"get_dtc_events","parameters":[{"license_list":"AB-123-CD,EF-456-GH","group_list":"10,11","vehicle_id_list":"555,556,557","from_date":"2026-04-26T00:00:00Z","to_date":"2026-04-27T00:00:00Z"}]}}'

Body

{
  "action": {
    "name": "get_dtc_events",
    "parameters": [
      {
        "license_list": "AB-123-CD,EF-456-GH",
        "group_list": "10,11",
        "vehicle_id_list": "555,556,557",
        "from_date": "2026-04-26T00:00:00Z",
        "to_date": "2026-04-27T00:00:00Z"
      }
    ]
  }
}

Response

Successful responses always wrap the action's payload in response.properties. The action_value field reports the handler outcome: "0" for success, "1" for invalid params, "2" for not allowed, "3" for limit-exceeded /pagination-session-expired, "999" for general error.

200 OK