{"id":2005,"date":"2025-04-10T18:36:15","date_gmt":"2025-04-10T22:36:15","guid":{"rendered":"https:\/\/documotors.com\/?p=2005"},"modified":"2025-04-10T18:36:16","modified_gmt":"2025-04-10T22:36:16","slug":"p0129","status":"publish","type":"post","link":"https:\/\/documotors.com\/wiki\/p0129\/","title":{"rendered":"P0129"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">El <strong>c\u00f3digo DTC P0129<\/strong> se refiere a una lectura anormalmente baja de presi\u00f3n barom\u00e9trica detectada por el sensor BARO (Barometric Pressure Sensor), que puede estar integrado en el MAF o ser independiente. Esta condici\u00f3n puede afectar el c\u00e1lculo correcto de carga del motor y, en consecuencia, la mezcla aire-combustible y el encendido.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Este error puede generar fallas de rendimiento, ralent\u00ed irregular y p\u00e9rdida de potencia.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" style=\"font-size:1.2em !important; border-bottom:1px solid #ccc !important; padding-bottom:0.8em !important; padding-top:1.2em !important; padding-right:25px; cursor:pointer; background:url(https:\/\/documotors.com\/wp-content\/uploads\/99174301744201836.svg) no-repeat right center; background-size:20px auto;\">Descripci\u00f3n del Error<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">El sensor BARO mide la presi\u00f3n atmosf\u00e9rica y le proporciona a la ECU una referencia fundamental para ajustar los c\u00e1lculos de inyecci\u00f3n, sobre todo en veh\u00edculos con turbo o en condiciones de gran altitud.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">El <strong>c\u00f3digo DTC P0129<\/strong> se activa cuando la ECU detecta que la se\u00f1al del sensor BARO es inferior al umbral esperado, incluso con el motor apagado. Esto puede deberse a:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Sensor barom\u00e9trico defectuoso o sucio<\/li>\n\n\n\n<li>Lectura err\u00f3nea del MAF (si el sensor est\u00e1 integrado)<\/li>\n\n\n\n<li>Cableado o conector da\u00f1ado<\/li>\n\n\n\n<li>Problemas de altitud (aunque poco com\u00fan, puede influir)<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" style=\"font-size:1.2em !important; border-bottom:1px solid #ccc !important; padding-bottom:0.8em !important; padding-top:1.2em !important; padding-right:25px; cursor:pointer; background:url(https:\/\/documotors.com\/wp-content\/uploads\/99174301744201836.svg) no-repeat right center; background-size:20px auto;\">Diagn\u00f3stico<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Con un esc\u00e1ner automotriz se puede verificar el valor de presi\u00f3n barom\u00e9trica que reporta la ECU. Si el valor es muy inferior a los niveles normales de presi\u00f3n atmosf\u00e9rica al nivel del mar (~101 kPa o 14.7 psi), se sospecha de una lectura err\u00f3nea.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Tambi\u00e9n se debe comprobar si el sensor est\u00e1 integrado al MAF y, en ese caso, evaluar el funcionamiento completo del MAF. Un mult\u00edmetro puede ayudar a verificar continuidad, tierra y voltaje de se\u00f1al. Si el sensor est\u00e1 en mal estado, puede requerirse reemplazo completo.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" style=\"font-size:1.2em !important; border-bottom:1px solid #ccc !important; padding-bottom:0.8em !important; padding-top:1.2em !important; padding-right:25px; cursor:pointer; background:url(https:\/\/documotors.com\/wp-content\/uploads\/99174301744201836.svg) no-repeat right center; background-size:20px auto;\">\u00bfEs grave el c\u00f3digo P0129?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">S\u00ed. Una lectura incorrecta de presi\u00f3n barom\u00e9trica altera la forma en que la ECU calcula la masa de aire que entra al motor, provocando mezcla incorrecta, detonaciones, fallos de encendido y p\u00e9rdida de eficiencia.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">En motores turboalimentados, puede causar problemas severos en el control del boost.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" style=\"font-size:1.2em !important; border-bottom:1px solid #ccc !important; padding-bottom:0.8em !important; padding-top:1.2em !important; padding-right:25px; cursor:pointer; background:url(https:\/\/documotors.com\/wp-content\/uploads\/99174301744201836.svg) no-repeat right center; background-size:20px auto;\">Posibles soluciones<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Limpiar o reemplazar el sensor BARO si est\u00e1 sucio o contaminado.<\/li>\n\n\n\n<li>Verificar el cableado y conector del sensor.<\/li>\n\n\n\n<li>Comprobar la integridad del sensor MAF si el BARO est\u00e1 integrado.<\/li>\n\n\n\n<li>Sustituir el sensor si los valores son inconsistentes o fijos.<\/li>\n\n\n\n<li>Borrar el c\u00f3digo y verificar si reaparece tras conducir.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" style=\"font-size:1.2em !important; border-bottom:1px solid #ccc !important; padding-bottom:0.8em !important; padding-top:1.2em !important; padding-right:25px; cursor:pointer; background:url(https:\/\/documotors.com\/wp-content\/uploads\/99174301744201836.svg) no-repeat right center; background-size:20px auto;\">Prevenciones<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>No lavar el motor sin cubrir sensores sensibles.<\/li>\n\n\n\n<li>Mantener el sistema de admisi\u00f3n limpio y libre de polvo o aceite.<\/li>\n\n\n\n<li>Utilizar sensores OEM o equivalentes de calidad comprobada.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" style=\"font-size:1.2em !important; border-bottom:1px solid #ccc !important; padding-bottom:0.8em !important; padding-top:1.2em !important; padding-right:25px; cursor:pointer; background:url(https:\/\/documotors.com\/wp-content\/uploads\/99174301744201836.svg) no-repeat right center; background-size:20px auto;\">C\u00f3digos relacionados con el P0129<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>P0101<\/strong> \u2013 Sensor MAF: Rango o funcionamiento incorrecto<\/li>\n\n\n\n<li><strong>P0102<\/strong> \u2013 Sensor MAF: Entrada baja<\/li>\n\n\n\n<li><strong>P0108<\/strong> \u2013 Sensor MAP: Entrada alta<\/li>\n\n\n\n<li><strong>P0113<\/strong> \u2013 Sensor IAT: Entrada alta<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>El c\u00f3digo DTC P0129 se refiere a una lectura anormalmente baja..<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[95],"tags":[96,90,18],"class_list":["post-2005","post","type-post","status-publish","format-standard","hentry","category-dtc","tag-codigos-dtc","tag-diagnosticos","tag-sistemas"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>C\u00f3digo de Error P0129 \u2013 Presi\u00f3n Barom\u00e9trica Demasiado Baja<\/title>\n<meta name=\"description\" content=\"El c\u00f3digo DTC P0129 se refiere a una lectura anormalmente baja de presi\u00f3n barom\u00e9trica detectada por el sensor BARO (Barometric Pressure Sensor), que puede\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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