{"id":6279,"date":"2025-12-16T17:57:59","date_gmt":"2025-12-17T01:57:59","guid":{"rendered":"https:\/\/3waycatalyst.com\/?p=6279"},"modified":"2025-12-16T17:59:48","modified_gmt":"2025-12-17T01:59:48","slug":"three-way-catalytic-converter-advanced-p0420-analysis-guide","status":"publish","type":"post","link":"https:\/\/3waycatalyst.com\/vi\/three-way-catalytic-converter-advanced-p0420-analysis-guide\/","title":{"rendered":"Three Way Catalytic Converter: Advanced P0420 Analysis Guide"},"content":{"rendered":"<h2 class=\"wp-block-heading\">Gi\u1edbi thi\u1ec7u<\/h2>\n\n\n\n<p>K\u1ef9 thu\u1eadt \u00f4 t\u00f4 hi\u1ec7n \u0111\u1ea1i ph\u1ee5 thu\u1ed9c r\u1ea5t nhi\u1ec1u v\u00e0o c\u00e1c h\u1ec7 th\u1ed1ng ki\u1ec3m so\u00e1t kh\u00ed th\u1ea3i ph\u1ee9c t\u1ea1p. Tr\u00e1i tim c\u1ee7a h\u1ec7 th\u1ed1ng n\u00e0y l\u00e0...<a href=\"https:\/\/3waycatalyst.com\/vi\/three-way-catalytic-converter-twc\/\"> <strong>B\u1ed9 chuy\u1ec3n \u0111\u1ed5i x\u00fac t\u00e1c ba chi\u1ec1u<\/strong> (TWC)<\/a>Khi M\u00f4-\u0111un \u0110i\u1ec1u khi\u1ec3n H\u1ec7 th\u1ed1ng Truy\u1ec1n \u0111\u1ed9ng (PCM) ph\u00e1t hi\u1ec7n s\u1ef1 kh\u00f4ng hi\u1ec7u qu\u1ea3 trong b\u1ed9 ph\u1eadn n\u00e0y, n\u00f3 s\u1ebd k\u00edch ho\u1ea1t M\u00e3 L\u1ed7i Ch\u1ea9n \u0111o\u00e1n (DTC) P0420: \u201cHi\u1ec7u su\u1ea5t H\u1ec7 th\u1ed1ng X\u00fac t\u00e1c D\u01b0\u1edbi Ng\u01b0\u1ee1ng (Ng\u00e2n h\u00e0ng 1)\u201d. M\u00e3 n\u00e0y cho bi\u1ebft r\u1eb1ng <strong>B\u1ed9 chuy\u1ec3n \u0111\u1ed5i x\u00fac t\u00e1c kh\u00ed th\u1ea3i<\/strong> Hi\u1ec7n t\u1ea1i, h\u1ec7 th\u1ed1ng kh\u00f4ng c\u00f2n qu\u1ea3n l\u00fd hi\u1ec7u qu\u1ea3 vi\u1ec7c l\u01b0u tr\u1eef oxy v\u00e0 kh\u1eed h\u00f3a ch\u1ea5t.<\/p>\n\n\n\n<p>Tuy nhi\u00ean, m\u00e3 l\u1ed7i P0420 kh\u00f4ng ph\u1ea3i l\u00fac n\u00e0o c\u0169ng b\u00e1o hi\u1ec7u b\u1ed9 chuy\u1ec3n \u0111\u1ed5i b\u1ecb h\u1ecfng. N\u00f3 th\u01b0\u1eddng l\u00e0 tri\u1ec7u ch\u1ee9ng c\u1ee7a c\u00e1c v\u1ea5n \u0111\u1ec1 \u1edf \u0111\u1ed9ng c\u01a1 ph\u00eda tr\u01b0\u1edbc. K\u1ef9 thu\u1eadt vi\u00ean ph\u1ea3i ph\u00e2n bi\u1ec7t gi\u1eefa b\u1ed9 chuy\u1ec3n \u0111\u1ed5i b\u1ecb xu\u1ed1ng c\u1ea5p v\u00e0... <strong>B\u1ed9 chuy\u1ec3n \u0111\u1ed5i x\u00fac t\u00e1c OEM<\/strong> v\u00e0 c\u00e1c l\u1ed7i h\u1ec7 th\u1ed1ng b\u1eaft ch\u01b0\u1edbc l\u1ed7i b\u1ed9 chuy\u1ec3n \u0111\u1ed5i x\u00fac t\u00e1c. Vi\u1ec7c thay th\u1ebf b\u1ed9 chuy\u1ec3n \u0111\u1ed5i x\u00fac t\u00e1c m\u00e0 kh\u00f4ng ch\u1ea9n \u0111o\u00e1n nguy\u00ean nh\u00e2n g\u1ed1c r\u1ec5 s\u1ebd d\u1eabn \u0111\u1ebfn l\u1ed7i l\u1eb7p l\u1ea1i. B\u00e0i vi\u1ebft n\u00e0y cung c\u1ea5p ph\u00e2n t\u00edch khoa h\u1ecdc, t\u1eebng b\u01b0\u1edbc v\u1ec1 m\u00e3 l\u1ed7i P0420, s\u1eed d\u1ee5ng ph\u00e2n t\u00edch d\u1ea1ng s\u00f3ng v\u00e0 di\u1ec5n gi\u1ea3i d\u1eef li\u1ec7u \u0111\u1ec3 x\u00e1c nh\u1eadn t\u00ecnh tr\u1ea1ng ho\u1ea1t \u0111\u1ed9ng c\u1ee7a b\u1ed9 chuy\u1ec3n \u0111\u1ed5i. <strong><a href=\"https:\/\/3waycatalyst.com\/vi\/three-way-catalytic-converter-twc\/\">B\u1ed9 chuy\u1ec3n \u0111\u1ed5i x\u00fac t\u00e1c ba chi\u1ec1u<\/a><\/strong>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Khoa h\u1ecdc v\u1ec1 b\u1ed9 chuy\u1ec3n \u0111\u1ed5i x\u00fac t\u00e1c ba chi\u1ec1u<\/h2>\n\n\n\n<p>\u0110\u1ec3 ch\u1ea9n \u0111o\u00e1n h\u1ec7 th\u1ed1ng, ng\u01b0\u1eddi ta ph\u1ea3i hi\u1ec3u v\u1ec1 h\u00f3a h\u1ecdc. <strong><a href=\"https:\/\/3waycatalyst.com\/vi\/three-way-catalytic-converter-twc\/\">B\u1ed9 chuy\u1ec3n \u0111\u1ed5i x\u00fac t\u00e1c ba chi\u1ec1u<\/a><\/strong> M\u00e1y th\u1ef1c hi\u1ec7n ba qu\u00e1 tr\u00ecnh \u0111\u1ed3ng th\u1eddi \u0111\u1ec3 gi\u1ea3m l\u01b0\u1ee3ng kh\u00ed th\u1ea3i \u0111\u1ed9c h\u1ea1i. N\u00f3 kh\u1eed oxit nit\u01a1 (NOx) th\u00e0nh nit\u01a1 v\u00e0 oxy. N\u00f3 oxy h\u00f3a carbon monoxide (CO) th\u00e0nh carbon dioxide. Cu\u1ed1i c\u00f9ng, n\u00f3 oxy h\u00f3a hydrocarbon ch\u01b0a ch\u00e1y (HC) th\u00e0nh carbon dioxide v\u00e0 n\u01b0\u1edbc.<\/p>\n\n\n\n<p>B\u1ed9 chuy\u1ec3n \u0111\u1ed5i s\u1eed d\u1ee5ng c\u1ea5u tr\u00fac t\u1ed5 ong b\u1eb1ng g\u1ed1m \u0111\u01b0\u1ee3c ph\u1ee7 c\u00e1c kim lo\u1ea1i qu\u00fd. B\u1ea1ch kim v\u00e0 paladi h\u1ed7 tr\u1ee3 qu\u00e1 tr\u00ecnh oxy h\u00f3a. Rhodium \u0111\u1ea3m nhi\u1ec7m vi\u1ec7c kh\u1eed NOx. M\u1ed9t y\u1ebfu t\u1ed1 quan tr\u1ecdng trong qu\u00e1 tr\u00ecnh n\u00e0y l\u00e0 Cerium. Cerium ho\u1ea1t \u0111\u1ed9ng nh\u01b0 m\u1ed9t mi\u1ebfng b\u1ecdt bi\u1ec3n oxy. N\u00f3 l\u01b0u tr\u1eef oxy d\u01b0 th\u1eeba khi h\u1ed7n h\u1ee3p nhi\u00ean li\u1ec7u ngh\u00e8o. N\u00f3 gi\u1ea3i ph\u00f3ng oxy khi h\u1ed7n h\u1ee3p gi\u00e0u. Kh\u1ea3 n\u0103ng l\u01b0u tr\u1eef oxy (OSC) n\u00e0y cho ph\u00e9p b\u1ed9 chuy\u1ec3n \u0111\u1ed5i oxy h\u00f3a c\u00e1c ch\u1ea5t g\u00e2y \u00f4 nhi\u1ec5m ngay c\u1ea3 trong \u0111i\u1ec1u ki\u1ec7n gi\u00e0u nhi\u00ean li\u1ec7u t\u1ea1m th\u1eddi.<\/p>\n\n\n\n<p>B\u1ed9 \u0111i\u1ec1u khi\u1ec3n PCM gi\u00e1m s\u00e1t OSC n\u00e0y \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh hi\u1ec7u qu\u1ea3. N\u00f3 so s\u00e1nh t\u1ed1c \u0111\u1ed9 chuy\u1ec3n m\u1ea1ch c\u1ee7a c\u1ea3m bi\u1ebfn oxy ph\u00eda tr\u01b0\u1edbc v\u1edbi c\u1ea3m bi\u1ebfn oxy ph\u00eda sau. M\u1ed9t h\u1ec7 th\u1ed1ng ho\u1ea1t \u0111\u1ed9ng t\u1ed1t s\u1ebd cho k\u1ebft qu\u1ea3 ch\u00ednh x\u00e1c. <a href=\"https:\/\/3waycatalyst.com\/vi\/three-way-catalytic-converter-twc\/\"><strong>B\u1ed9 chuy\u1ec3n \u0111\u1ed5i x\u00fac t\u00e1c ba chi\u1ec1u<\/strong> <\/a>L\u00e0m gi\u1ea3m b\u1edbt s\u1ef1 dao \u0111\u1ed9ng. N\u1ebfu c\u1ea3m bi\u1ebfn ph\u00eda h\u1ea1 l\u01b0u b\u1eaft ch\u01b0\u1edbc c\u1ea3m bi\u1ebfn ph\u00eda th\u01b0\u1ee3ng l\u01b0u, OSC s\u1ebd b\u1ecb c\u1ea1n ki\u1ec7t. Khi \u0111\u00f3, PCM s\u1ebd b\u00e1o l\u1ed7i P0420.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/3waycatalyst.com\/vi\/the-essential-guide-to-three-way-catalytic-converters\/\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"635\" src=\"https:\/\/3waycatalyst.com\/wp-content\/uploads\/2025\/07\/Guide-to-Three-Way-Catalytic-Converters.jpg\" alt=\"H\u01b0\u1edbng d\u1eabn thi\u1ebft y\u1ebfu v\u1ec1 b\u1ed9 chuy\u1ec3n \u0111\u1ed5i x\u00fac t\u00e1c ba chi\u1ec1u\" class=\"wp-image-1807\" title=\"\" srcset=\"https:\/\/3waycatalyst.com\/wp-content\/uploads\/2025\/07\/Guide-to-Three-Way-Catalytic-Converters.jpg 1024w, https:\/\/3waycatalyst.com\/wp-content\/uploads\/2025\/07\/Guide-to-Three-Way-Catalytic-Converters-300x186.jpg 300w, https:\/\/3waycatalyst.com\/wp-content\/uploads\/2025\/07\/Guide-to-Three-Way-Catalytic-Converters-768x476.jpg 768w, https:\/\/3waycatalyst.com\/wp-content\/uploads\/2025\/07\/Guide-to-Three-Way-Catalytic-Converters-600x372.jpg 600w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption class=\"wp-element-caption\"><a href=\"https:\/\/3waycatalyst.com\/vi\/the-essential-guide-to-three-way-catalytic-converters\/\">H\u01b0\u1edbng d\u1eabn thi\u1ebft y\u1ebfu v\u1ec1 b\u1ed9 chuy\u1ec3n \u0111\u1ed5i x\u00fac t\u00e1c ba chi\u1ec1u<\/a><\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Ch\u1ea9n \u0111o\u00e1n ban \u0111\u1ea7u: Lo\u1ea1i tr\u1eeb c\u00e1c bi\u1ebfn s\u1ed1 b\u00ean ngo\u00e0i<\/h2>\n\n\n\n<p>Tr\u01b0\u1edbc khi l\u00ean \u00e1n <strong>B\u1ed9 chuy\u1ec3n \u0111\u1ed5i x\u00fac t\u00e1c kh\u00ed th\u1ea3i<\/strong>C\u00e1c k\u1ef9 thu\u1eadt vi\u00ean ph\u1ea3i lo\u1ea1i tr\u1eeb c\u00e1c bi\u1ebfn s\u1ed1 b\u00ean ngo\u00e0i. Thi\u1ebft b\u1ecb gi\u00e1m s\u00e1t d\u1ef1a v\u00e0o d\u1eef li\u1ec7u \u0111\u1ea7u v\u00e0o ch\u00ednh x\u00e1c. D\u1eef li\u1ec7u \u0111\u1ea7u v\u00e0o b\u1ecb l\u1ed7i s\u1ebd g\u00e2y ra k\u1ebft qu\u1ea3 d\u01b0\u01a1ng t\u00ednh gi\u1ea3.<\/p>\n\n\n\n<p><strong>1. X\u00e1c minh c\u00e1c m\u00e3 l\u1ed7i DTC kh\u00e1c<\/strong><br>B\u1ed9 \u0111i\u1ec1u khi\u1ec3n \u0111\u1ed9ng c\u01a1 (PCM) th\u01b0\u1eddng \u01b0u ti\u00ean x\u1eed l\u00fd m\u00e3 l\u1ed7i P0420, nh\u01b0ng c\u00e1c m\u00e3 l\u1ed7i kh\u00e1c m\u1edbi ti\u1ebft l\u1ed9 nguy\u00ean nh\u00e2n th\u1ef1c s\u1ef1. C\u00e1c m\u00e3 l\u1ed7i \u0111\u00e1nh l\u1eeda kh\u00f4ng \u0111\u1ec1u (P0300-P0308) cho th\u1ea5y nhi\u00ean li\u1ec7u ch\u01b0a \u0111\u01b0\u1ee3c x\u1eed l\u00fd h\u1ebft b\u1ecb th\u1ea3i ra \u1ed1ng x\u1ea3. Nhi\u00ean li\u1ec7u n\u00e0y l\u00e0m qu\u00e1 nhi\u1ec7t c\u00e1c b\u1ed9 ph\u1eadn. C\u00e1c m\u00e3 l\u1ed7i \u0111i\u1ec1u ch\u1ec9nh nhi\u00ean li\u1ec7u (P0171\/P0174 ho\u1eb7c P0172\/P0175) ch\u1ec9 ra s\u1ef1 m\u1ea5t c\u00e2n b\u1eb1ng h\u1ed7n h\u1ee3p kh\u00f4ng kh\u00ed\/nhi\u00ean li\u1ec7u. C\u00e1c m\u00e3 l\u1ed7i \u0111i\u1ec1u ch\u1ec9nh th\u1eddi \u0111i\u1ec3m tr\u1ee5c cam cho th\u1ea5y c\u00e1c v\u1ea5n \u0111\u1ec1 v\u1ec1 s\u1ef1 ch\u1ed3ng ch\u00e9o van. H\u00e3y x\u1eed l\u00fd c\u00e1c m\u00e3 l\u1ed7i n\u00e0y tr\u01b0\u1edbc ti\u00ean. Ch\u00fang \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn th\u00e0nh ph\u1ea7n kh\u00ed th\u1ea3i.<\/p>\n\n\n\n<p><strong>2. Ki\u1ec3m tra r\u00f2 r\u1ec9 kh\u00ed th\u1ea3i<\/strong><br>\u0110\u00e2y l\u00e0 nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn nh\u1ea5t g\u00e2y ra m\u00e3 l\u1ed7i P0420 sai. R\u00f2 r\u1ec9 \u1edf ph\u00eda tr\u01b0\u1edbc b\u1ed9 chuy\u1ec3n \u0111\u1ed5i kh\u00ed th\u1ea3i s\u1ebd \u0111\u01b0a oxy kh\u00f4ng \u0111\u01b0\u1ee3c \u0111o l\u01b0\u1eddng v\u00e0o. R\u00f2 r\u1ec9 g\u1ea7n c\u1ea3m bi\u1ebfn ph\u00eda sau t\u1ea1o ra &#034;hi\u1ec7u \u1ee9ng Venturi&#034;. Hi\u1ec7u \u1ee9ng n\u00e0y h\u00fat kh\u00f4ng kh\u00ed b\u00ean ngo\u00e0i v\u00e0o d\u00f2ng kh\u00ed th\u1ea3i. C\u1ea3m bi\u1ebfn ph\u00e1t hi\u1ec7n l\u01b0\u1ee3ng oxy d\u01b0 th\u1eeba n\u00e0y v\u00e0 b\u00e1o c\u00e1o t\u00ecnh tr\u1ea1ng h\u1ed7n h\u1ee3p ngh\u00e8o nhi\u00ean li\u1ec7u. PCM ra l\u1ec7nh cung c\u1ea5p th\u00eam nhi\u00ean li\u1ec7u. H\u1ed7n h\u1ee3p gi\u00e0u nhi\u00ean li\u1ec7u d\u1eabn \u0111\u1ebfn qu\u00e1 nhi\u1ec7t b\u1ed9 chuy\u1ec3n \u0111\u1ed5i kh\u00ed th\u1ea3i.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Ho\u1ea1t \u0111\u1ed9ng:<\/strong> Ki\u1ec3m tra c\u1ed5 g\u00f3p kh\u00ed th\u1ea3i v\u00e0 c\u00e1c \u1ed1ng m\u1ec1m. T\u00ecm ki\u1ebfm c\u00e1c v\u1ebft mu\u1ed9i than \u0111en. N\u1ebfu ki\u1ec3m tra b\u1eb1ng m\u1eaft th\u01b0\u1eddng kh\u00f4ng ph\u00e1t hi\u1ec7n th\u1ea5y g\u00ec, h\u00e3y ti\u1ebfn h\u00e0nh ki\u1ec3m tra h\u1ec7 th\u1ed1ng kh\u00ed th\u1ea3i b\u1eb1ng kh\u00f3i.<\/li>\n<\/ul>\n\n\n\n<p><strong>3. Ki\u1ec3m tra nhi\u1ec7t \u0111\u1ed9<\/strong><br>B\u1ed9 chuy\u1ec3n \u0111\u1ed5i ho\u1ea1t \u0111\u1ed9ng hi\u1ec7u qu\u1ea3 t\u1ea1o ra nhi\u1ec7t th\u00f4ng qua c\u00e1c ph\u1ea3n \u1ee9ng h\u00f3a h\u1ecdc t\u1ecfa nhi\u1ec7t. Nhi\u1ec7t \u0111\u1ed9 \u0111\u1ea7u ra ph\u1ea3i cao h\u01a1n nhi\u1ec7t \u0111\u1ed9 \u0111\u1ea7u v\u00e0o.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Ph\u01b0\u01a1ng ph\u00e1p:<\/strong> S\u1eed d\u1ee5ng nhi\u1ec7t k\u1ebf h\u1ed3ng ngo\u1ea1i. \u0110o v\u00f2ng h\u00e0n \u1edf \u0111\u1ea7u v\u00e0o. \u0110o v\u00f2ng h\u00e0n \u1edf \u0111\u1ea7u ra.<\/li>\n\n\n\n<li><strong>Ti\u00eau chu\u1ea9n:<\/strong> Nhi\u1ec7t \u0111\u1ed9 \u0111\u1ea7u ra ph\u1ea3i cao h\u01a1n nhi\u1ec7t \u0111\u1ed9 \u0111\u1ea7u v\u00e0o \u00edt nh\u1ea5t t\u1eeb \u200b\u200b20\u00b0C \u0111\u1ebfn 50\u00b0C. N\u1ebfu nhi\u1ec7t \u0111\u1ed9 \u0111\u1ea7u ra th\u1ea5p h\u01a1n, ph\u1ea3n \u1ee9ng h\u00f3a h\u1ecdc \u0111\u00e3 ng\u1eebng l\u1ea1i.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Ph\u00e2n t\u00edch TWC: Gi\u1ea3i th\u00edch d\u1ea1ng s\u00f3ng<\/h2>\n\n\n\n<p>Ph\u01b0\u01a1ng ph\u00e1p ch\u00ednh x\u00e1c nh\u1ea5t \u0111\u1ec3 ch\u1ea9n \u0111o\u00e1n m\u1ed9t <strong><a href=\"https:\/\/3waycatalyst.com\/vi\/three-way-catalytic-converter-twc\/\">B\u1ed9 chuy\u1ec3n \u0111\u1ed5i x\u00fac t\u00e1c ba chi\u1ec1u<\/a><\/strong> \u0110\u00e2y l\u00e0 ph\u00e2n t\u00edch d\u1ea1ng s\u00f3ng. Vi\u1ec7c n\u00e0y y\u00eau c\u1ea7u m\u1ed9t c\u00f4ng c\u1ee5 qu\u00e9t \u0111\u1ed3 th\u1ecb ho\u1eb7c m\u00e1y hi\u1ec7n s\u00f3ng. B\u1ea1n ph\u1ea3i quan s\u00e1t m\u1ed1i quan h\u1ec7 \u0111i\u1ec7n \u00e1p gi\u1eefa C\u1ea3m bi\u1ebfn 1 Ng\u00e2n h\u00e0ng 1 (ph\u00eda th\u01b0\u1ee3ng ngu\u1ed3n) v\u00e0 C\u1ea3m bi\u1ebfn 2 Ng\u00e2n h\u00e0ng 1 (ph\u00eda h\u1ea1 ngu\u1ed3n).<\/p>\n\n\n\n<p><strong>D\u1ea1ng s\u00f3ng kh\u1ecfe m\u1ea1nh<\/strong><br>Kh\u1edfi \u0111\u1ed9ng \u0111\u1ed9ng c\u01a1 \u1edf t\u1ed1c \u0111\u1ed9 2500 v\u00f2ng\/ph\u00fat. \u0110\u1ea3m b\u1ea3o h\u1ec7 th\u1ed1ng \u0111ang \u1edf ch\u1ebf \u0111\u1ed9 V\u00f2ng k\u00edn. C\u1ea3m bi\u1ebfn ph\u00eda tr\u01b0\u1edbc s\u1ebd dao \u0111\u1ed9ng nhanh gi\u1eefa 0,1V (ngh\u00e8o nhi\u00ean li\u1ec7u) v\u00e0 0,9V (gi\u00e0u nhi\u00ean li\u1ec7u). \u0110i\u1ec1u n\u00e0y cho th\u1ea5y PCM \u0111ang ch\u1ee7 \u0111\u1ed9ng \u0111i\u1ec1u ch\u1ec9nh t\u1ef7 l\u1ec7 kh\u00f4ng kh\u00ed\/nhi\u00ean li\u1ec7u. C\u1ea3m bi\u1ebfn ph\u00eda sau s\u1ebd hi\u1ec3n th\u1ecb \u0111i\u1ec7n \u00e1p \u1ed5n \u0111\u1ecbnh, th\u01b0\u1eddng kho\u1ea3ng 0,45V \u0111\u1ebfn 0,6V. \u0110\u01b0\u1eddng \u0111i\u1ec7n \u00e1p \u1ed5n \u0111\u1ecbnh n\u00e0y ch\u1ee9ng t\u1ecf... <strong><a href=\"https:\/\/3waycatalyst.com\/vi\/three-way-catalytic-converter-twc\/\">B\u1ed9 chuy\u1ec3n \u0111\u1ed5i x\u00fac t\u00e1c ba chi\u1ec1u<\/a><\/strong> N\u00f3 \u0111ang h\u1ea5p th\u1ee5 c\u00e1c xung oxy. Qu\u00e1 tr\u00ecnh kh\u1eed h\u00f3a h\u1ecdc \u0111ang di\u1ec5n ra m\u1ea1nh m\u1ebd.<\/p>\n\n\n\n<p><strong>D\u1ea1ng s\u00f3ng b\u1ecb l\u1ed7i (M\u1ea5t t\u00edn hi\u1ec7u OSC)<\/strong><br>Trong m\u1ed9t b\u1ed9 ph\u1eadn b\u1ecb l\u1ed7i, l\u1edbp ph\u1ee7 Cerium kh\u00f4ng c\u00f2n kh\u1ea3 n\u0103ng l\u01b0u tr\u1eef oxy. C\u1ea3m bi\u1ebfn ph\u00eda sau m\u1ea5t kh\u1ea3 n\u0103ng \u0111\u1ec7m t\u00edn hi\u1ec7u. D\u1ea1ng s\u00f3ng ph\u00eda sau b\u1eaft \u0111\u1ea7u ph\u1ea3n chi\u1ebfu d\u1ea1ng s\u00f3ng ph\u00eda tr\u01b0\u1edbc. N\u00f3 chuy\u1ec3n \u0111\u1ed5i nhanh ch\u00f3ng t\u1eeb \u0111i\u1ec7n \u00e1p th\u1ea5p sang \u0111i\u1ec7n \u00e1p cao. Khi t\u1ef7 l\u1ec7 chuy\u1ec3n \u0111\u1ed5i gi\u1eefa c\u1ea3m bi\u1ebfn ph\u00eda tr\u01b0\u1edbc v\u00e0 ph\u00eda sau ti\u1ebfn g\u1ea7n \u0111\u1ebfn 1:1, PCM s\u1ebd thi\u1ebft l\u1eadp m\u00e3 l\u1ed7i P0420.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">So s\u00e1nh c\u00e1c m\u1eabu d\u1eef li\u1ec7u c\u1ea3m bi\u1ebfn<\/h2>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table class=\"has-fixed-layout\"><tbody><tr><td>\u0110i\u1ec3m d\u1eef li\u1ec7u<\/td><td>Kh\u1ecfe m\u1ea1nh <strong>B\u1ed9 chuy\u1ec3n \u0111\u1ed5i x\u00fac t\u00e1c ba chi\u1ec1u<\/strong><\/td><td>B\u1ed9 chuy\u1ec3n \u0111\u1ed5i b\u1ecb l\u1ed7i\/xu\u1ed1ng c\u1ea5p<\/td><\/tr><tr><td><strong>C\u1ea3m bi\u1ebfn O2 ph\u00eda th\u01b0\u1ee3ng ngu\u1ed3n<\/strong><\/td><td>Chuy\u1ec3n m\u1ea1ch nhanh (0,1V \u2013 0,9V)<\/td><td>Chuy\u1ec3n m\u1ea1ch nhanh (0,1V \u2013 0,9V)<\/td><\/tr><tr><td><strong>C\u1ea3m bi\u1ebfn O2 ph\u00eda h\u1ea1 l\u01b0u<\/strong><\/td><td>\u0110i\u1ec7n \u00e1p \u1ed5n \u0111\u1ecbnh (kho\u1ea3ng 0,5V \u2013 0,7V)<\/td><td>Chuy\u1ec3n m\u1ea1ch nhanh (Sao ch\u00e9p l\u00ean ph\u00eda tr\u00ean)<\/td><\/tr><tr><td><strong>S\u1ed1 l\u1ea7n \u0111\u1ebfm ch\u00e9o<\/strong><\/td><td>S\u1ed1 l\u01b0\u1ee3ng cao (ph\u00eda th\u01b0\u1ee3ng ngu\u1ed3n) \/ S\u1ed1 l\u01b0\u1ee3ng th\u1ea5p (ph\u00eda h\u1ea1 ngu\u1ed3n)<\/td><td>S\u1ed1 l\u01b0\u1ee3ng cao tr\u00ean c\u1ea3 hai c\u1ea3m bi\u1ebfn<\/td><\/tr><tr><td><strong>Nhi\u1ec7t \u0111\u1ed9 \u0111\u1ea7u ra<\/strong><\/td><td>Cao h\u01a1n nhi\u1ec7t \u0111\u1ed9 \u0111\u1ea7u v\u00e0o (+50\u00b0F \/ +28\u00b0C)<\/td><td>B\u1eb1ng ho\u1eb7c th\u1ea5p h\u01a1n \u0111\u1ea7u v\u00e0o<\/td><\/tr><tr><td><strong>\u0110i\u1ec1u ch\u1ec9nh nhi\u00ean li\u1ec7u (LTFT)<\/strong><\/td><td>G\u1ea7n 0% (+\/- 5%)<\/td><td>C\u00f3 th\u1ec3 b\u00ecnh th\u01b0\u1eddng, ho\u1eb7c t\u0103ng cao n\u1ebfu c\u00f3 r\u00f2 r\u1ec9.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Ch\u1ebf \u0111\u1ed9 $06 D\u1eef li\u1ec7u: L\u1edbp Ch\u1ea9n \u0111o\u00e1n N\u00e2ng cao<\/h2>\n\n\n\n<p>Most technicians stop at the live data graph. However, Mode $06 offers deeper insight. This mode displays the raw test results for non-continuous monitors. The PCM runs specific tests on the catalyst monitor to verify OSC.<\/p>\n\n\n\n<p>Access Mode $06 on your scan tool. Locate the TID (Test ID) and CID (Component ID) for the Catalyst Monitor Bank 1. The data will show a \u201cTest Value,\u201d a \u201cMin Limit,\u201d and a \u201cMax Limit.\u201d Even if the Check Engine Light is off, Mode $06 reveals if the converter is marginally passing. A Test Value perilously close to the failure threshold indicates the <strong>B\u1ed9 chuy\u1ec3n \u0111\u1ed5i x\u00fac t\u00e1c OEM<\/strong> is degrading. This confirms that a P0420 code is imminent. This step validates the repair before you order expensive parts.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Causes of Converter Degradation<\/h2>\n\n\n\n<p>M\u1ed8T <strong><a href=\"https:\/\/3waycatalyst.com\/vi\/three-way-catalytic-converter-twc\/\">B\u1ed9 chuy\u1ec3n \u0111\u1ed5i x\u00fac t\u00e1c ba chi\u1ec1u<\/a><\/strong> contains no moving parts. It rarely fails on its own. External factors usually destroy it.<\/p>\n\n\n\n<p><strong>1. Thermal Shock and Melting<\/strong><br>Raw fuel entering the exhaust ignites inside the converter. This causes temperatures to exceed 2000\u00b0F (1100\u00b0C). The ceramic substrate melts. This creates a restriction. Backpressure increases. Engine power plummets. Misfires and leaking injectors are the primary causes.<\/p>\n\n\n\n<p><strong>2. Chemical Poisoning<\/strong><br>Certain contaminants coat the precious metals. This renders the washcoat inert.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Silicone:<\/strong> Enters via leaking coolant (head gasket failure) or non-sensor-safe sealants. It coats the sensor and catalyst glass-like.<\/li>\n\n\n\n<li><strong>Phosphorus:<\/strong> Enters via excessive oil consumption. Worn piston rings or valve guides allow oil into the combustion chamber.<\/li>\n\n\n\n<li><strong>K\u1ebdm:<\/strong> Found in certain oil additives. It accumulates on the catalyst surface.<\/li>\n<\/ul>\n\n\n\n<p><strong>3. Mechanical Damage<\/strong><br>Impacts from road debris fracture the ceramic honeycomb. The pieces rattle inside the shell. They block the gas flow. A \u201crattle test\u201d using a rubber mallet confirms this structural failure.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">High-Flow vs. OEM: Understanding Replacement Options<\/h2>\n\n\n\n<p>When replacement becomes necessary, the choice between an <strong>B\u1ed9 chuy\u1ec3n \u0111\u1ed5i x\u00fac t\u00e1c OEM<\/strong> v\u00e0 m\u1ed9t <strong>High-Flow Catalytic Converter<\/strong> impacts the repair success.<\/p>\n\n\n\n<p>M\u1ed8T <strong>B\u1ed9 chuy\u1ec3n \u0111\u1ed5i x\u00fac t\u00e1c OEM<\/strong> contains a high density of cells (typically 400 to 600 Cells Per Square Inch \u2013 CPSI). It also contains a high loading of precious metals. The PCM calibration expects this specific efficiency.<\/p>\n\n\n\n<p>M\u1ed8T <strong>High-Flow Catalytic Converter<\/strong> typically features a lower cell count (200 CPSI). This reduces backpressure and increases horsepower. However, the lower surface area reduces Oxygen Storage Capacity. On a standard street vehicle, a <strong>High-Flow Catalytic Converter<\/strong> often triggers a P0420 code because it cannot store enough oxygen to satisfy the strict factory monitor. You should only use high-flow units on vehicles with modified ECU software (tuning) that accounts for the different efficiency curve. For standard repairs, an OEM or a high-quality \u201cOEM-grade\u201d aftermarket unit is mandatory to keep the light off.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Manufacturer-Specific Diagnostic Nuances<\/h2>\n\n\n\n<p>Different manufacturers utilize distinct strategies to monitor the <strong>B\u1ed9 chuy\u1ec3n \u0111\u1ed5i x\u00fac t\u00e1c kh\u00ed th\u1ea3i<\/strong>.<\/p>\n\n\n\n<p><strong>Honda \/ Acura<\/strong><br>B\u1ed9 \u0111i\u1ec1u khi\u1ec3n \u0111\u1ed9ng c\u01a1 (PCM) c\u1ee7a Honda c\u1ef1c k\u1ef3 nh\u1ea1y c\u1ea3m. Ch\u00fang th\u01b0\u1eddng b\u00e1o l\u1ed7i P0420 tr\u01b0\u1edbc khi b\u1ed9 chuy\u1ec3n \u0111\u1ed5i kh\u00ed th\u1ea3i b\u1ecb h\u1ecfng ho\u00e0n to\u00e0n. C\u1eadp nh\u1eadt ph\u1ea7n m\u1ec1m l\u00e0 b\u01b0\u1edbc \u0111\u1ea7u ti\u00ean r\u1ea5t quan tr\u1ecdng. H\u00e3y ki\u1ec3m tra c\u00e1c b\u1ea3n tin k\u1ef9 thu\u1eadt (TSB) li\u00ean quan \u0111\u1ebfn vi\u1ec7c n\u1ea1p l\u1ea1i ph\u1ea7n m\u1ec1m PCM. Ngo\u00e0i ra, \u0111\u1ed9ng c\u01a1 V6 c\u1ee7a Honda v\u1edbi h\u1ec7 th\u1ed1ng qu\u1ea3n l\u00fd xi-lanh bi\u1ebfn thi\u00ean (VCM) th\u01b0\u1eddng ti\u00eau th\u1ee5 d\u1ea7u. D\u1ea7u n\u00e0y s\u1ebd l\u00e0m b\u1ea9n b\u1ed9 chuy\u1ec3n \u0111\u1ed5i kh\u00ed th\u1ea3i. B\u1ea1n ph\u1ea3i gi\u1ea3i quy\u1ebft v\u1ea5n \u0111\u1ec1 VCM \u0111\u1ec3 ng\u0103n b\u1ed9 chuy\u1ec3n \u0111\u1ed5i kh\u00ed th\u1ea3i m\u1edbi b\u1ecb h\u1ecfng.<\/p>\n\n\n\n<p><strong>Toyota \/ Lexus<\/strong><br>Toyota s\u1eed d\u1ee5ng c\u1ea3m bi\u1ebfn t\u1ef7 l\u1ec7 kh\u00f4ng kh\u00ed\/nhi\u00ean li\u1ec7u (A\/F) \u1edf ph\u00eda tr\u01b0\u1edbc b\u1ed9 chuy\u1ec3n \u0111\u1ed5i x\u00fac t\u00e1c thay v\u00ec c\u00e1c c\u1ea3m bi\u1ebfn Zirconia ti\u00eau chu\u1ea9n. C\u1ea3m bi\u1ebfn A\/F ho\u1ea1t \u0111\u1ed9ng \u1edf m\u1ed9t d\u00f2ng \u0111i\u1ec7n c\u1ee5 th\u1ec3 ch\u1ee9 kh\u00f4ng ph\u1ea3i \u0111i\u1ec7n \u00e1p. Vi\u1ec7c ch\u1ea9n \u0111o\u00e1n y\u00eau c\u1ea7u xem x\u00e9t t\u1ef7 l\u1ec7 t\u01b0\u01a1ng \u0111\u01b0\u01a1ng (Lambda). C\u00e1c c\u1ea3m bi\u1ebfn ph\u00eda sau c\u1ee7a Toyota \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 ho\u1ea1t \u0111\u1ed9ng ch\u1eadm. M\u1ed9t s\u1ef1 gia t\u0103ng nh\u1ecf trong ho\u1ea1t \u0111\u1ed9ng ph\u00eda sau s\u1ebd nhanh ch\u00f3ng k\u00edch ho\u1ea1t m\u00e3 l\u1ed7i. H\u00e3y ki\u1ec3m tra th\u1eddi gian ph\u1ea3n h\u1ed3i c\u1ee7a c\u1ea3m bi\u1ebfn A\/F tr\u01b0\u1edbc khi k\u1ebft lu\u1eadn b\u1ed9 chuy\u1ec3n \u0111\u1ed5i x\u00fac t\u00e1c b\u1ecb h\u1ecfng.<\/p>\n\n\n\n<p><strong>Ford<\/strong><br>\u0110\u1ed9ng c\u01a1 Ford EcoBoost t\u1ea1o ra \u1ee9ng su\u1ea5t nhi\u1ec7t cao l\u00ean... <strong><a href=\"https:\/\/3waycatalyst.com\/vi\/three-way-catalytic-converter-twc\/\">B\u1ed9 chuy\u1ec3n \u0111\u1ed5i x\u00fac t\u00e1c ba chi\u1ec1u<\/a><\/strong>B\u1ed9 t\u0103ng \u00e1p l\u00e0m m\u00e1t kh\u00ed th\u1ea3i khi \u0111\u1ed9ng c\u01a1 ch\u1ea1y kh\u00f4ng t\u1ea3i nh\u01b0ng l\u1ea1i l\u00e0m n\u00f3ng kh\u00ed th\u1ea3i \u0111\u00e1ng k\u1ec3 khi ho\u1ea1t \u0111\u1ed9ng \u1edf t\u1ea3i. Ki\u1ec3m tra xem c\u00f3 &#034;l\u01b0\u1ee3ng mu\u1ed9i than t\u00edch t\u1ee5&#034; t\u1eeb h\u1ec7 th\u1ed1ng phun nhi\u00ean li\u1ec7u tr\u1ef1c ti\u1ebfp hay kh\u00f4ng. Th\u00f4ng th\u01b0\u1eddng, &#034;\u0111i\u1ec1u ch\u1ec9nh ki\u1ec3u \u00dd&#034; (l\u00e1i xe \u1edf v\u00f2ng tua m\u00e1y cao li\u00ean t\u1ee5c) s\u1ebd l\u00e0m s\u1ea1ch mu\u1ed9i than v\u00e0 kh\u00f4i ph\u1ee5c hi\u1ec7u su\u1ea5t t\u1ea1m th\u1eddi. Ford c\u0169ng theo d\u00f5i c\u1ea3m bi\u1ebfn ph\u00eda sau \u0111\u1ec3 ph\u00e1t hi\u1ec7n ph\u1ea3n \u1ee9ng &#034;ng\u1eaft nhi\u00ean li\u1ec7u khi gi\u1ea3m t\u1ed1c&#034;.<\/p>\n\n\n\n<p><strong>Nissan<\/strong><br>Nissan t\u00edch h\u1ee3p b\u1ed9 chuy\u1ec3n \u0111\u1ed5i x\u00fac t\u00e1c v\u00e0o \u1ed1ng x\u1ea3 tr\u00ean nhi\u1ec1u m\u1eabu xe. C\u00e1c \u1ed1ng x\u1ea3 n\u00e0y d\u1ec5 b\u1ecb n\u1ee9t. V\u1ebft n\u1ee9t cho ph\u00e9p kh\u00f4ng kh\u00ed l\u1ecdt v\u00e0o, g\u00e2y ra m\u00e3 l\u1ed7i P0420. H\u01a1n n\u1eefa, khi c\u00e1c b\u1ed9 chuy\u1ec3n \u0111\u1ed5i n\u00e0y b\u1ecb h\u01b0 h\u1ecfng, ch\u00e2n kh\u00f4ng trong \u0111\u1ed9ng c\u01a1 c\u00f3 th\u1ec3 h\u00fat b\u1ee5i g\u1ed1m tr\u1edf l\u1ea1i bu\u1ed3ng \u0111\u1ed1t, l\u00e0m h\u1ecfng th\u00e0nh xi lanh. Ch\u1ea9n \u0111o\u00e1n s\u1edbm tr\u00ean c\u00e1c m\u1eabu xe Nissan l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 b\u1ea3o v\u1ec7 \u0111\u1ed9ng c\u01a1.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Quy tr\u00ecnh ch\u1ea9n \u0111o\u00e1n t\u1eebng b\u01b0\u1edbc<\/h2>\n\n\n\n<p>H\u00e3y tu\u00e2n theo ph\u01b0\u01a1ng ph\u00e1p khoa h\u1ecdc n\u00e0y \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 ch\u00ednh x\u00e1c.<\/p>\n\n\n\n<p><strong>B\u01b0\u1edbc 1: Ph\u00e2n t\u00edch m\u00e3 v\u00e0 \u0111\u00f3ng b\u0103ng khung h\u00ecnh<\/strong><br>K\u1ebft n\u1ed1i thi\u1ebft b\u1ecb qu\u00e9t l\u1ed7i. Ghi l\u1ea1i d\u1eef li\u1ec7u \u0111\u00f3ng b\u0103ng. Ghi ch\u00fa v\u00f2ng tua m\u00e1y (RPM), t\u1ea3i tr\u1ecdng v\u00e0 nhi\u1ec7t \u0111\u1ed9 n\u01b0\u1edbc l\u00e0m m\u00e1t t\u1ea1i th\u1eddi \u0111i\u1ec3m x\u1ea3y ra l\u1ed7i. N\u1ebfu m\u00e3 l\u1ed7i xu\u1ea5t hi\u1ec7n trong qu\u00e1 tr\u00ecnh kh\u1edfi \u0111\u1ed9ng ngu\u1ed9i, h\u00e3y nghi ng\u1edd m\u1ea1ch s\u01b0\u1edfi. N\u1ebfu m\u00e3 l\u1ed7i xu\u1ea5t hi\u1ec7n khi xe \u0111ang ch\u1ea1y \u1ed5n \u0111\u1ecbnh, h\u00e3y nghi ng\u1edd hi\u1ec7u su\u1ea5t b\u1ed9 chuy\u1ec3n \u0111\u1ed5i x\u00fac t\u00e1c.<\/p>\n\n\n\n<p><strong>B\u01b0\u1edbc 2: Ki\u1ec3m tra s\u1ee9c kh\u1ecfe h\u1ec7 th\u1ed1ng c\u01a1 b\u1ea3n<\/strong><br>Ki\u1ec3m tra t\u00ecnh tr\u1ea1ng c\u01a1 kh\u00ed c\u1ee7a \u0111\u1ed9ng c\u01a1. Ki\u1ec3m tra m\u1ee9c d\u1ea7u v\u00e0 t\u00ecnh tr\u1ea1ng d\u1ea7u. Ki\u1ec3m tra m\u1ee9c n\u01b0\u1edbc l\u00e0m m\u00e1t. L\u1eafng nghe xem c\u00f3 r\u00f2 r\u1ec9 kh\u00ed th\u1ea3i hay kh\u00f4ng. Ki\u1ec3m tra tr\u1ef1c quan h\u1ec7 th\u1ed1ng d\u00e2y \u0111i\u1ec7n c\u1ee7a c\u1ea3m bi\u1ebfn O2.<\/p>\n\n\n\n<p><strong>B\u01b0\u1edbc 3: T\u1ea1o \u0111i\u1ec1u ki\u1ec7n gi\u00e0u\/ngh\u00e8o<\/strong><br>X\u00e1c minh quy\u1ec1n h\u1ea1n c\u1ee7a c\u1ea3m bi\u1ebfn.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>L\u00e0m gi\u00e0u propan:<\/strong> Th\u00eam propan v\u00e0o \u0111\u01b0\u1eddng n\u1ea1p. C\u1ea3m bi\u1ebfn ph\u00eda th\u01b0\u1ee3ng ngu\u1ed3n ph\u1ea3i b\u00e1o m\u1ee9c cao (gi\u00e0u nhi\u00ean li\u1ec7u). C\u1ea3m bi\u1ebfn ph\u00eda h\u1ea1 ngu\u1ed3n n\u00ean t\u0103ng d\u1ea7n.<\/li>\n\n\n\n<li><strong>R\u00f2 r\u1ec9 ch\u00e2n kh\u00f4ng:<\/strong> T\u1ea1o ra m\u1ed9t l\u1ed7 r\u00f2 ch\u00e2n kh\u00f4ng. C\u1ea3m bi\u1ebfn ph\u00eda th\u01b0\u1ee3ng ngu\u1ed3n ph\u1ea3i b\u00e1o m\u1ee9c th\u1ea5p (H\u1ed7n h\u1ee3p ngh\u00e8o nhi\u00ean li\u1ec7u).<\/li>\n\n\n\n<li>N\u1ebfu c\u00e1c c\u1ea3m bi\u1ebfn kh\u00f4ng ph\u1ea3n h\u1ed3i, th\u00ec l\u1ed7i n\u1eb1m \u1edf c\u00e1c c\u1ea3m bi\u1ebfn, ch\u1ee9 kh\u00f4ng ph\u1ea3i \u1edf b\u1ed9 chuy\u1ec3n \u0111\u1ed5i.<\/li>\n<\/ul>\n\n\n\n<p><strong>B\u01b0\u1edbc 4: Ki\u1ec3m tra chu k\u1ef3 l\u00e1i xe<\/strong><br>Kh\u1edfi \u0111\u1ed9ng \u0111\u1ed9ng c\u01a1 \u0111\u1ebfn nhi\u1ec7t \u0111\u1ed9 ho\u1ea1t \u0111\u1ed9ng (tr\u00ean 190\u00b0F). L\u00e1i xe \u1edf t\u1ed1c \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh (55 MPH). Quan s\u00e1t lu\u1ed3ng d\u1eef li\u1ec7u t\u1eeb c\u1ea3m bi\u1ebfn O2 ph\u00eda sau.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>K\u1ebft qu\u1ea3 A:<\/strong> \u0110\u01b0\u1eddng bi\u1ec3u \u0111\u1ed3 ph\u1eb3ng. B\u1ed9 chuy\u1ec3n \u0111\u1ed5i ho\u1ea1t \u0111\u1ed9ng t\u1ed1t. M\u00e3 l\u1ed7i c\u00f3 th\u1ec3 xu\u1ea5t hi\u1ec7n kh\u00f4ng th\u01b0\u1eddng xuy\u00ean ho\u1eb7c do r\u00f2 r\u1ec9 g\u00e2y ra.<\/li>\n\n\n\n<li><strong>K\u1ebft qu\u1ea3 B:<\/strong> \u0110\u01b0\u1eddng d\u00e2y dao \u0111\u1ed9ng \u0111\u1ed3ng b\u1ed9 v\u1edbi c\u1ea3m bi\u1ebfn ph\u00eda th\u01b0\u1ee3ng ngu\u1ed3n.<a href=\"https:\/\/3waycatalyst.com\/vi\/three-way-catalytic-converter-twc\/\"> <strong>B\u1ed9 chuy\u1ec3n \u0111\u1ed5i x\u00fac t\u00e1c ba chi\u1ec1u<\/strong> <\/a>\u0110\u00e3 b\u1ecb h\u1ecfng v\u1ec1 m\u1eb7t h\u00f3a h\u1ecdc.<\/li>\n<\/ul>\n\n\n\n<p><strong>B\u01b0\u1edbc 5: Ki\u1ec3m tra \u00e1p su\u1ea5t ng\u01b0\u1ee3c<\/strong><br>Th\u00e1o c\u1ea3m bi\u1ebfn oxy ph\u00eda tr\u01b0\u1edbc. L\u1eafp \u0111\u1ed3ng h\u1ed3 \u0111o \u00e1p su\u1ea5t. T\u0103ng t\u1ed1c \u0111\u1ed9ng c\u01a1 l\u00ean \u200b\u200b2500 v\u00f2ng\/ph\u00fat.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Gi\u1edbi h\u1ea1n:<\/strong> \u00c1p su\u1ea5t ng\u01b0\u1ee3c kh\u00f4ng \u0111\u01b0\u1ee3c v\u01b0\u1ee3t qu\u00e1 1,5 PSI.<\/li>\n\n\n\n<li><strong>Ph\u00e2n t\u00edch:<\/strong> \u00c1p su\u1ea5t cao cho th\u1ea5y c\u00f3 th\u1ec3 b\u1ecb ch\u1ea3y ho\u1eb7c t\u1eafc ngh\u1ebdn. <strong>B\u1ed9 chuy\u1ec3n \u0111\u1ed5i x\u00fac t\u00e1c kh\u00ed th\u1ea3i<\/strong>.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">S\u1eeda ch\u1eefa v\u00e0 x\u00e1c nh\u1eadn<\/h2>\n\n\n\n<p>N\u1ebfu qu\u00e1 tr\u00ecnh ch\u1ea9n \u0111o\u00e1n x\u00e1c nh\u1eadn l\u1ed7i <strong><a href=\"https:\/\/3waycatalyst.com\/vi\/three-way-catalytic-converter-twc\/\">B\u1ed9 chuy\u1ec3n \u0111\u1ed5i x\u00fac t\u00e1c ba chi\u1ec1u<\/a><\/strong>Thay th\u1ebf l\u00e0 l\u1ef1a ch\u1ecdn duy nh\u1ea5t. C\u00e1c ch\u1ea5t ph\u1ee5 gia l\u00e0m s\u1ea1ch hi\u1ebfm khi kh\u1eafc ph\u1ee5c \u0111\u01b0\u1ee3c l\u1edbp ph\u1ee7 \u0111\u00e3 b\u1ecb hao m\u00f2n v\u1ec1 m\u1eb7t h\u00f3a h\u1ecdc.<\/p>\n\n\n\n<p>Ch\u1ecdn ph\u1ea7n \u0111\u00fang. M\u1ed9t <strong>B\u1ed9 chuy\u1ec3n \u0111\u1ed5i x\u00fac t\u00e1c OEM<\/strong> \u0110\u1ea3m b\u1ea3o x\u00e1c su\u1ea5t th\u00e0nh c\u00f4ng cao nh\u1ea5t. N\u1ebfu ch\u1ecdn h\u00e0ng ph\u1ee5 t\u00f9ng thay th\u1ebf, h\u00e3y x\u00e1c minh xem n\u00f3 c\u00f3 \u0111\u01b0\u1ee3c \u201cCh\u1ee9ng nh\u1eadn EPA\u201d ho\u1eb7c \u201cTu\u00e2n th\u1ee7 CARB\u201d t\u00f9y thu\u1ed9c v\u00e0o khu v\u1ef1c c\u1ee7a b\u1ea1n hay kh\u00f4ng. Tr\u00e1nh s\u1eed d\u1ee5ng b\u1ed9 chuy\u1ec3n \u0111\u1ed5i \u201c\u0111a n\u0103ng\u201d tr\u00ean c\u00e1c ph\u01b0\u01a1ng ti\u1ec7n ph\u00e1t th\u1ea3i th\u1ea5p (LEV) hi\u1ec7n \u0111\u1ea1i; ch\u00fang thi\u1ebfu l\u01b0\u1ee3ng kim lo\u1ea1i qu\u00fd c\u1ea7n thi\u1ebft.<\/p>\n\n\n\n<p>Sau khi l\u1eafp \u0111\u1eb7t, h\u00e3y \u0111\u1eb7t l\u1ea1i b\u1ed9 nh\u1edb Keep Alive (KAM) trong PCM. Thao t\u00e1c n\u00e0y s\u1ebd x\u00f3a c\u00e1c th\u00f4ng s\u1ed1 \u0111i\u1ec1u ch\u1ec9nh nhi\u00ean li\u1ec7u v\u00e0 h\u1ec7 s\u1ed1 l\u00e3o h\u00f3a \u0111\u00e3 h\u1ecdc. PCM c\u1ea7n ph\u1ea3i h\u1ecdc l\u1ea1i c\u00e1c \u0111\u1eb7c t\u00ednh c\u1ee7a b\u1ed9 chuy\u1ec3n \u0111\u1ed5i m\u1edbi. Th\u1ef1c hi\u1ec7n chu tr\u00ecnh l\u00e1i xe do nh\u00e0 s\u1ea3n xu\u1ea5t quy \u0111\u1ecbnh \u0111\u1ec3 \u0111\u1eb7t \u201cCatalyst Monitor\u201d v\u1ec1 tr\u1ea1ng th\u00e1i \u201cReady\u201d.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Ph\u1ea7n k\u1ebft lu\u1eadn<\/h2>\n\n\n\n<p>M\u00e3 l\u1ed7i P0420 l\u00e0 m\u1ed9t ch\u1ec9 b\u00e1o \u0111\u00e1ng tin c\u1eady v\u1ec1\u2026 <strong><a href=\"https:\/\/3waycatalyst.com\/vi\/three-way-catalytic-converter-twc\/\">B\u1ed9 chuy\u1ec3n \u0111\u1ed5i x\u00fac t\u00e1c ba chi\u1ec1u<\/a><\/strong> S\u1ef1 thi\u1ebfu hi\u1ec7u qu\u1ea3 l\u00e0 k\u1ebft qu\u1ea3 cu\u1ed1i c\u00f9ng c\u1ee7a qu\u00e1 tr\u00ecnh ch\u1ea9n \u0111o\u00e1n, ch\u1ee9 kh\u00f4ng ph\u1ea3i l\u00e0 \u0111i\u1ec3m kh\u1edfi \u0111\u1ea7u. Ph\u01b0\u01a1ng ph\u00e1p khoa h\u1ecdc ph\u00e2n bi\u1ec7t gi\u1eefa tri\u1ec7u ch\u1ee9ng v\u00e0 nguy\u00ean nh\u00e2n g\u1ed1c r\u1ec5. K\u1ef9 thu\u1eadt vi\u00ean ph\u1ea3i ph\u00e2n t\u00edch d\u1ea1ng s\u00f3ng, x\u00e1c minh vi\u1ec7c ki\u1ec3m so\u00e1t nhi\u00ean li\u1ec7u v\u00e0 ki\u1ec3m tra r\u00f2 r\u1ec9 v\u1eadt l\u00fd.<\/p>\n\n\n\n<p>Cho d\u00f9 \u0111ang x\u1eed l\u00fd m\u1ed9t ti\u00eau chu\u1ea9n <strong>B\u1ed9 chuy\u1ec3n \u0111\u1ed5i x\u00fac t\u00e1c OEM<\/strong> ho\u1eb7c m\u1ed9t bu\u1ed5i bi\u1ec3u di\u1ec5n <strong>High-Flow Catalytic Converter<\/strong>V\u1ec1 c\u01a1 b\u1ea3n, c\u00e1c nguy\u00ean t\u1eafc v\u1eabn gi\u1eef nguy\u00ean. B\u1ed9 chuy\u1ec3n \u0111\u1ed5i x\u00fac t\u00e1c c\u1ea7n m\u1ed9t m\u00f4i tr\u01b0\u1eddng h\u00f3a h\u1ecdc c\u00e2n b\u1eb1ng \u0111\u1ec3 ho\u1ea1t \u0111\u1ed9ng. Vi\u1ec7c b\u1ecf qua nguy\u00ean nh\u00e2n g\u1ed1c r\u1ec5\u2014cho d\u00f9 \u0111\u00f3 l\u00e0 ti\u00eau hao d\u1ea7u, \u0111\u00e1nh l\u1eeda sai ho\u1eb7c r\u00f2 r\u1ec9 kh\u00ed th\u1ea3i\u2014s\u1ebd d\u1eabn \u0111\u1ebfn h\u01b0 h\u1ecfng b\u1ed9 ph\u1eadn thay th\u1ebf. Ch\u1ea9n \u0111o\u00e1n ch\u00ednh x\u00e1c gi\u00fap ti\u1ebft ki\u1ec7m th\u1eddi gian, ti\u1ec1n b\u1ea1c v\u00e0 \u0111\u1ea3m b\u1ea3o xe \u0111\u00e1p \u1ee9ng c\u00e1c ti\u00eau chu\u1ea9n m\u00f4i tr\u01b0\u1eddng.<\/p>","protected":false},"excerpt":{"rendered":"<p>H\u01b0\u1edbng d\u1eabn n\u00e0y tr\u00ecnh b\u00e0y chi ti\u1ebft c\u00e1ch ch\u1ea9n \u0111o\u00e1n m\u00e3 l\u1ed7i P0420 \u0111\u1ed1i v\u1edbi b\u1ed9 chuy\u1ec3n \u0111\u1ed5i x\u00fac t\u00e1c ba chi\u1ec1u, bao g\u1ed3m ph\u00e2n t\u00edch d\u1ea1ng s\u00f3ng c\u1ea3m bi\u1ebfn O2, nguy\u00ean nh\u00e2n g\u1ed1c r\u1ec5 c\u1ee7a l\u1ed7i v\u00e0 l\u1ef1a ch\u1ecdn gi\u1eefa b\u1ed9 chuy\u1ec3n \u0111\u1ed5i ch\u00ednh h\u00e3ng (OEM) v\u00e0 b\u1ed9 chuy\u1ec3n \u0111\u1ed5i l\u01b0u l\u01b0\u1ee3ng cao (High-Flow).<\/p>","protected":false},"author":1,"featured_media":6280,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"googlesitekit_rrm_CAowgdPcCw:productID":"","footnotes":""},"categories":[98],"tags":[1288,1539,1540,550,1541,26,1542],"class_list":["post-6279","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-guide","tag-catalyst-efficiency","tag-exhaust-catalytic-converter","tag-high-flow-catalytic-converter-2","tag-oem-catalytic-converter","tag-p0420-code","tag-three-way-catalytic-converter","tag-twc-analysis"],"_links":{"self":[{"href":"https:\/\/3waycatalyst.com\/vi\/wp-json\/wp\/v2\/posts\/6279","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/3waycatalyst.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/3waycatalyst.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/3waycatalyst.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/3waycatalyst.com\/vi\/wp-json\/wp\/v2\/comments?post=6279"}],"version-history":[{"count":0,"href":"https:\/\/3waycatalyst.com\/vi\/wp-json\/wp\/v2\/posts\/6279\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/3waycatalyst.com\/vi\/wp-json\/wp\/v2\/media\/6280"}],"wp:attachment":[{"href":"https:\/\/3waycatalyst.com\/vi\/wp-json\/wp\/v2\/media?parent=6279"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/3waycatalyst.com\/vi\/wp-json\/wp\/v2\/categories?post=6279"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/3waycatalyst.com\/vi\/wp-json\/wp\/v2\/tags?post=6279"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}