{
  "$schema": "robofaults-fault-record/v0",
  "kind": "error",
  "brand": "roomba",
  "page_en": "https://robofaults.com/roomba/error-42/",
  "page_es": "https://robofaults.com/es/roomba/error-42/",
  "code": "42",
  "slug": "error-42",
  "device_type": "vacuum",
  "name_en": "Lost on the Smart Map",
  "name_es": "Perdido en el Smart Map",
  "badge": "ERR 42",
  "severity": "warn",
  "severity_note_en": "targeted cleaning fails until the robot can locate itself",
  "severity_note_es": "la limpieza dirigida falla hasta que el robot logre ubicarse",
  "series": [
    "i",
    "j",
    "s"
  ],
  "tools_en": "none",
  "tools_es": "ninguna",
  "time_min": 10,
  "difficulty": "easy",
  "safety": "none",
  "safety_note_en": "",
  "safety_note_es": "",
  "meaning_en": "Error 42 means the robot <b>couldn't work out where it is on the Smart Map</b> when you sent it to clean a specific room. It was probably moved by hand, or the room changed enough to be unrecognizable.",
  "meaning_es": "El error 42 significa que el robot <b>no pudo determinar dónde está dentro del Smart Map</b> cuando lo enviaste a limpiar una habitación concreta. Probablemente alguien lo movió a mano, o la habitación cambió tanto que no la reconoce.",
  "causes": [
    {
      "title_en": "Robot carried mid-job",
      "title_es": "Robot trasladado en plena tarea",
      "detail_en": "Picking it up and dropping it somewhere else severs its link to the map.",
      "detail_es": "Levantarlo y soltarlo en otro sitio corta su vínculo con el mapa.",
      "likelihood": "most_common"
    },
    {
      "title_en": "Room changed since mapping",
      "title_es": "Habitación cambiada desde el mapeo",
      "detail_en": "Big furniture moves or renovations make the mapped landmarks useless.",
      "detail_es": "Los cambios grandes de muebles o las reformas dejan inservibles las referencias mapeadas.",
      "likelihood": "common"
    },
    {
      "title_en": "Camera obscured or room dark",
      "title_es": "Cámara tapada o habitación a oscuras",
      "detail_en": "Dust on the lens or no light at all leaves the robot without visual anchors.",
      "detail_es": "El polvo en la lente o la falta total de luz dejan al robot sin anclas visuales.",
      "likelihood": "common"
    }
  ],
  "steps": [
    {
      "title_en": "Start from the dock",
      "title_es": "Arranca desde la base de carga",
      "detail_en": "Put the robot on its dock and launch the job from there — that's its strongest reference point.",
      "detail_es": "Coloca el robot en su base y lanza la tarea desde ahí — es su punto de referencia más fiable."
    },
    {
      "title_en": "Don't relocate it mid-mission",
      "title_es": "No lo cambies de sitio a mitad de misión",
      "detail_en": "If you must move it, expect it to re-localize slowly or fail.",
      "detail_es": "Si tienes que moverlo, cuenta con que tardará en reubicarse o fallará."
    },
    {
      "title_en": "Restore lighting and layout",
      "title_es": "Restaura luz y disposición",
      "detail_en": "Match the conditions the map was built under, and wipe the camera window clean.",
      "detail_es": "Reproduce las condiciones con las que se creó el mapa y limpia la ventana de la cámara."
    },
    {
      "title_en": "Remap if the home changed for good",
      "title_es": "Vuelve a mapear si la casa cambió para siempre",
      "detail_en": "After a renovation or big furniture reshuffle, run a fresh mapping job.",
      "detail_es": "Tras una reforma o una redistribución grande de muebles, lanza un mapeo nuevo."
    }
  ],
  "parts": [],
  "related": [
    "17",
    "32",
    "33"
  ],
  "sources": [
    {
      "label_en": "iRobot Support — i and s Series, Error 42",
      "label_es": "Soporte de iRobot — Series i/s, error 42",
      "url": "https://homesupport.irobot.com/s/article/19497",
      "kind": "official"
    },
    {
      "label_en": "iRobot Support — j Series, Error 42",
      "label_es": "Soporte de iRobot — Serie j, error 42",
      "url": "https://homesupport.irobot.com/s/article/31113",
      "kind": "official"
    }
  ],
  "confidence": "official",
  "last_verified": "2026-07-05"
}