{"id":3663,"date":"2026-03-28T17:43:58","date_gmt":"2026-03-28T17:43:58","guid":{"rendered":"https:\/\/www.zamulecars.com\/uncategorized\/codigo-error-p0420-catalizador\/"},"modified":"2026-03-29T17:41:44","modified_gmt":"2026-03-29T17:41:44","slug":"codigo-error-p0420-catalizador","status":"publish","type":"post","link":"https:\/\/www.zamulecars.com\/en\/servicios\/mecanica-rapida\/codigo-error-p0420-catalizador\/","title":{"rendered":"C\u00f3digo de Error P0420: Catalizador Ineficiente \u2013 Diagn\u00f3stico y Reparaci\u00f3n"},"content":{"rendered":"<h2>Error code P0420: Catalyst efficiency below threshold<\/h2>\n<p>The <strong>code P0420<\/strong> indicates that your vehicle's catalytic converter isn't working with the expected efficiency. It's one of the most common codes in both diesel and petrol cars, and can have multiple causes. We'll explain everything you need to know.<\/p>\n<h3>What exactly does P0420 mean?<\/h3>\n<p>Your car's OBD-II system constantly monitors the catalytic converter's efficiency by comparing readings from the lambda sensors before and after the converter. When it detects that the conversion of polluting gases is below the set threshold, it generates the P0420 code.<\/p>\n<h3>Main causes<\/h3>\n<p>Catalytic converter worn out or deteriorated due to age (over 150,000 km), defective rear lambda sensor giving incorrect readings, exhaust leak before the catalytic converter, incorrect fuel mixture damaging the catalytic converter, use of low-quality fuel, burnt oil contaminating the catalytic converter, or a previous injector failure that wasn't repaired in time.<\/p>\n<h3>Associated symptoms<\/h3>\n<p>Check engine light on, noticeable loss of power, rotten egg smell from the exhaust (sulfur), increased fuel consumption, ITV failure due to emissions, and in some cases, metallic noises from the catalytic converter.<\/p>\n<h3>Cost of the repair<\/h3>\n<p>If the cause is a faulty lambda sensor, the repair is relatively economical (80?-200?). If the catalytic converter needs replacing, the cost is higher, but at Zamule Cars we offer <strong>approved alternatives at much more competitive prices<\/strong> than the dealership.<\/p>\n<h3>Diagnostics at Zamule Cars<\/h3>\n<p>At <strong>Zamule Cars<\/strong> We perform a complete diagnostic to identify the exact cause before quoting. We don't replace parts unnecessarily. <strong>No appointment needed<\/strong> in Son Castell, Palma. <a href=\"tel:+34971918147\">971 918 147<\/a>.<\/p>\n<hr\/>\n<h3>Need a trustworthy workshop?<\/h3>\n<p>If you need a reliable workshop in Palma de Mallorca, at <strong>Zamule Cars<\/strong> We specialize in electromechanics, diagnostics, and comprehensive maintenance. We offer no-obligation advice.<\/p>\n<p><a href=\"https:\/\/wa.me\/34682931164?text=Hola%2C%20necesito%20asesoramiento%20para%20mi%20coche\" target=\"_blank\" rel=\"noopener\"><strong>Write us on WhatsApp<\/strong><\/a> | Tel: <a href=\"tel:+34682931164\">682 931 164<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>C\u00f3digo de error P0420: Eficiencia del catalizador por debajo del umbral El c\u00f3digo P0420 indica que el catalizador de tu veh\u00edculo no est\u00e1 funcionando con la eficiencia esperada. Es uno de los c\u00f3digos m\u00e1s comunes tanto en coches di\u00e9sel como gasolina, y puede tener m\u00faltiples causas. Te explicamos todo lo que necesitas saber. \u00bfQu\u00e9 significa [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_focuskw":"","_yoast_wpseo_title":"C\u00f3digo de Error P0420 | Zamule Cars","_yoast_wpseo_metadesc":"C\u00f3digo de Error P0420: gu\u00eda del taller Zamule Cars en Palma. S\u00edntomas, coste real y soluci\u00f3n sin rodeos. WhatsApp 682 931 164.","_yoast_wpseo_meta-robots-noindex":"","_yoast_wpseo_canonical":"","_yoast_wpseo_opengraph-title":"","_yoast_wpseo_opengraph-description":"","_yoast_wpseo_twitter-title":"","_yoast_wpseo_twitter-description":"","_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[34],"tags":[],"class_list":["post-3663","post","type-post","status-publish","format-standard","hentry","category-mecanica-rapida"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>C\u00f3digo de Error P0420 | Zamule Cars<\/title>\n<meta name=\"description\" content=\"C\u00f3digo de Error P0420: gu\u00eda del taller Zamule Cars en Palma. S\u00edntomas, coste real y soluci\u00f3n sin rodeos. 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