{"id":2000,"date":"2025-04-10T18:35:10","date_gmt":"2025-04-10T22:35:10","guid":{"rendered":"https:\/\/documotors.com\/?p=2000"},"modified":"2025-04-10T18:35:11","modified_gmt":"2025-04-10T22:35:11","slug":"p0128","status":"publish","type":"post","link":"https:\/\/documotors.com\/wiki\/p0128\/","title":{"rendered":"P0128"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">El <strong>c\u00f3digo DTC P0128<\/strong> indica que la ECU ha detectado que el motor no alcanza la temperatura \u00f3ptima de funcionamiento en el tiempo previsto, debido posiblemente a un termostato que se ha quedado abierto. Este c\u00f3digo es uno de los m\u00e1s comunes relacionados con el sistema de refrigeraci\u00f3n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Un motor que no alcanza su temperatura ideal funciona de forma ineficiente, consume m\u00e1s combustible y contamina m\u00e1s.<\/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 termostato regula el flujo del refrigerante entre el motor y el radiador. Si permanece abierto, el refrigerante circula permanentemente y el motor no se calienta lo suficiente.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">La ECU espera que el motor supere cierta temperatura (normalmente entre 80 \u00b0C y 95 \u00b0C) dentro de un plazo despu\u00e9s del arranque. Si esto no ocurre, se activa el <strong>c\u00f3digo DTC P0128<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Causas frecuentes incluyen:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Termostato abierto o pegado<\/li>\n\n\n\n<li>Sensor ECT que entrega lecturas err\u00f3neas<\/li>\n\n\n\n<li>Refrigerante de baja calidad o sobrellenado<\/li>\n\n\n\n<li>Aire atrapado en el sistema<\/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 revisar el comportamiento del sensor ECT. Si el motor tarda mucho en calentarse o no alcanza temperaturas normales, se sospecha del termostato.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Tambi\u00e9n se debe comparar la temperatura del refrigerante con un term\u00f3metro externo para validar la lectura del sensor, y revisar si el ventilador del radiador se activa antes de lo debido.<\/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 P0128?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">S\u00ed. Un motor que funciona siempre fr\u00edo genera mezcla rica, mayor consumo, residuos de carbonilla, y mal funcionamiento del convertidor catal\u00edtico. Adem\u00e1s, en climas fr\u00edos puede afectar la calefacci\u00f3n del habit\u00e1culo.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Aunque el motor siga funcionando, es importante corregir este c\u00f3digo para evitar desgaste prematuro y sobreconsumo.<\/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>Reemplazar el termostato por uno de especificaci\u00f3n OEM.<\/li>\n\n\n\n<li>Verificar y purgar el sistema de enfriamiento si hay aire atrapado.<\/li>\n\n\n\n<li>Revisar el sensor ECT y su cableado.<\/li>\n\n\n\n<li>Asegurarse de que el nivel y tipo de refrigerante sea el correcto.<\/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 operar el veh\u00edculo sin termostato o con piezas universales no calibradas.<\/li>\n\n\n\n<li>Realizar mantenimiento preventivo al sistema de refrigeraci\u00f3n.<\/li>\n\n\n\n<li>Usar refrigerante recomendado por el fabricante y mantener el sistema sellado.<\/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 P0128<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>P0125<\/strong> \u2013 Temperatura insuficiente para operaci\u00f3n en lazo cerrado<\/li>\n\n\n\n<li><strong>P0126<\/strong> \u2013 El motor no alcanza temperatura de funcionamiento<\/li>\n\n\n\n<li><strong>P0116<\/strong> \u2013 Sensor ECT: Rango\/funcionamiento incorrecto<\/li>\n\n\n\n<li><strong>P0118<\/strong> \u2013 Sensor ECT: Entrada alta<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>El c\u00f3digo DTC P0128 indica que la ECU ha detectado que..<\/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-2000","post","type-post","status-publish","format-standard","hentry","category-dtc","tag-codigos-dtc","tag-diagnosticos","tag-sistemas"],"yoast_head":"<!-- This site is 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