Error Code

info

This document describes authentication-related error codes for Private Users. Error codes that occur when calling the Vehicle Data API apply to both Private Users and Business Users. See Vehicle Data API Error Codes.

Error Response

Error Response Format

{
  "error": {
    "code": "40001",
    "message": "Invalid Parameters",
    "requestId": "835bdbd4-1105-4a8c-b438-fa0873d1b246",
    "details": [
      {
        "field": "identifier",
        "issue": "must not be blank."
      }
    ],
    "timestamp": "2026-07-03T10:00:00+09:00"
  }
}

Field	Type	Description	Required
error	object	Error information	Required
error.code	string	Error code	Required
error.message	string	Error message	Required
error.requestId	string	Request ID	Required
error.details	array of object	Error details	Required
error.details.field	string	Field where the error occurred	Optional
error.details.issue	string	Error detail for the field	Optional
error.timestamp	string	Timestamp	Required

Error Code

Status Code	Error Code	Description	Action
400	40001	Invalid parameters	Check the error field in details.
400	40002	Missing Authorization header	Add a Bearer token.
400	40003	Token expired	Call Create Access Token again to issue a new access token.
400	40004	Invalid token	Sign in again and issue a new token.
404	40404	User or key not found	Check clientId and identifier.
500	50001	Internal server error	Retry later.
502	50201	External integration error	Retry later.