{"id":56735,"date":"2019-04-01T10:31:05","date_gmt":"2019-04-01T15:31:05","guid":{"rendered":"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/?p=56735"},"modified":"2024-02-11T12:02:47","modified_gmt":"2024-02-11T20:02:47","slug":"knock-sensor-codes-p0325-and-p0330-1999-lexus-es-300","status":"publish","type":"post","link":"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/2019\/04\/knock-sensor-codes-p0325-and-p0330-1999-lexus-es-300","title":{"rendered":"Knock sensor codes P0325 and P0330 1999 Lexus ES 300"},"content":{"rendered":"<p><img decoding=\"async\" class=\"alignnone size-full wp-image-37434\" src=\"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-content\/uploads\/2016\/11\/2001-lexus-es300.jpg\" alt=\" Lexus ES300\" width=\"600\" height=\"443\" srcset=\"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-content\/uploads\/2016\/11\/2001-lexus-es300.jpg 600w, https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-content\/uploads\/2016\/11\/2001-lexus-es300-300x222.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/p>\n<p>Car was throwing knock sensor codes P0325 and P0330. Check engine light on. Car radio intermittently goes off then comes back on and when that happens dash lights will sort of flicker and if headlights are on, they will turn off then comes right back on. Replaced both sensors and wiring harness. Found a rats nest underneath the intake manifold. After replacing sensors and harness, codes are still there but with them are now P0171 and P0420.<\/p>\n<hr \/>\n<p>I would start by looking at all the wiring at and around the area you found the nest. Then look around other areas specifically around the ECM <a href=\"https:\/\/www.freeautomechanic.com\/wiring-harness.html\">wiring harness.<\/a> I think the P0171 is being caused by an intake leak and at the same time influencing the P0420 code. I have added the code information below.<\/p>\n<h3>Lexus Code P0325 &amp; P0330 Diagnostic Procedure<\/h3>\n<p>(best viewed in Google Chrome Browser)<br \/>\n\n\t\t<div id=\"wppdfemb-frame-container-56755\" style=\"-webkit-overflow-scrolling:auto;\">\n\t\t\t<iframe src=\"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/?index=1&#038;pdfID=56755&#038;pdfemb-serveurl=https%3A%2F%2Fwww.freeautomechanic.com%2Fmechanic%2Fforum%2Fwp-content%2Fuploads%2Fsecurepdfs%2F2019%2F04%2F1999-lexus-es330-codes-P0325-P0330.pdf\"\n\t\t\t\tid=\"wppdf-emb-iframe-56755\"\n\t\t\t\tdata-pdf-index=\"1\"\n\t\t\t\tclass=\"pdfembed-iframe nonfullscreen\"\n\t\t\t\tstyle=\"border:none;width:100%;max-width:500px;min-height:500px\"\n\t\t\t\tscrolling=\"yes\">\n\t\t\t<\/iframe>\n\t\t<\/div>\n\n\t\t<\/p>\n<h3>Lexus Code P0171 &amp; P0172 Diagnostic Procedure<\/h3>\n\n\t\t<div id=\"wppdfemb-frame-container-56756\" style=\"-webkit-overflow-scrolling:auto;\">\n\t\t\t<iframe src=\"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/?index=2&#038;pdfID=56756&#038;pdfemb-serveurl=https%3A%2F%2Fwww.freeautomechanic.com%2Fmechanic%2Fforum%2Fwp-content%2Fuploads%2Fsecurepdfs%2F2019%2F04%2F1999-lexus-es330-codes-P0171-P0172.pdf\"\n\t\t\t\tid=\"wppdf-emb-iframe-56756\"\n\t\t\t\tdata-pdf-index=\"2\"\n\t\t\t\tclass=\"pdfembed-iframe nonfullscreen\"\n\t\t\t\tstyle=\"border:none;width:100%;max-width:500px;min-height:500px\"\n\t\t\t\tscrolling=\"yes\">\n\t\t\t<\/iframe>\n\t\t<\/div>\n\n\t\t\n<h3>Lexus Code P0420 Diagnostic Procedure<\/h3>\n\n\t\t<div id=\"wppdfemb-frame-container-56757\" style=\"-webkit-overflow-scrolling:auto;\">\n\t\t\t<iframe src=\"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/?index=3&#038;pdfID=56757&#038;pdfemb-serveurl=https%3A%2F%2Fwww.freeautomechanic.com%2Fmechanic%2Fforum%2Fwp-content%2Fuploads%2Fsecurepdfs%2F2019%2F04%2F1999-lexus-es330-codes-P0420.pdf\"\n\t\t\t\tid=\"wppdf-emb-iframe-56757\"\n\t\t\t\tdata-pdf-index=\"3\"\n\t\t\t\tclass=\"pdfembed-iframe nonfullscreen\"\n\t\t\t\tstyle=\"border:none;width:100%;max-width:500px;min-height:500px\"\n\t\t\t\tscrolling=\"yes\">\n\t\t\t<\/iframe>\n\t\t<\/div>\n\n\t\t\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Car was throwing knock sensor codes P0325 and P0330. Check engine light on. Car radio intermittently goes off then comes back on and when that happens dash lights will sort of flicker and if headlights are on, they will turn off then comes right back on. Replaced both sensors and wiring harness. Found a rats&hellip;&nbsp;<a href=\"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/2019\/04\/knock-sensor-codes-p0325-and-p0330-1999-lexus-es-300\" rel=\"bookmark\">Read More &raquo;<span class=\"screen-reader-text\">Knock sensor codes P0325 and P0330 1999 Lexus ES 300<\/span><\/a><\/p>\n","protected":false},"author":14953,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"","neve_meta_content_width":0,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":"","footnotes":""},"categories":[1,318],"tags":[11121,22924,22925,9550,9479],"class_list":["post-56735","post","type-post","status-publish","format-standard","hentry","category-auto-repair-questions","category-lexus-auto-repair-questions","tag-code-p0171","tag-code-p0325","tag-code-p0330","tag-code-p0420","tag-es300"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v23.0 (Yoast SEO v27.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Knock sensor codes P0325 and P0330 1999 Lexus ES 300 - FreeAutoMechanic Advice<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/2019\/04\/knock-sensor-codes-p0325-and-p0330-1999-lexus-es-300\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Knock sensor codes P0325 and P0330 1999 Lexus ES 300\" \/>\n<meta property=\"og:description\" content=\"Car was throwing knock sensor codes P0325 and P0330. Check engine light on. Car radio intermittently goes off then comes back on and when that happens dash lights will sort of flicker and if headlights are on, they will turn off then comes right back on. Replaced both sensors and wiring harness. Found a rats&hellip;&nbsp;Read More &raquo;Knock sensor codes P0325 and P0330 1999 Lexus ES 300\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/2019\/04\/knock-sensor-codes-p0325-and-p0330-1999-lexus-es-300\" \/>\n<meta property=\"og:site_name\" content=\"FreeAutoMechanic Advice\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/freeautomechanic\" \/>\n<meta property=\"article:published_time\" content=\"2019-04-01T15:31:05+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-02-11T20:02:47+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-content\/uploads\/2016\/11\/2001-lexus-es300.jpg\" \/>\n<meta name=\"author\" content=\"Beth Fessenden-Blackburn\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Beth Fessenden-Blackburn\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"Knock sensor codes P0325 and P0330 1999 Lexus ES 300 - FreeAutoMechanic Advice","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/2019\/04\/knock-sensor-codes-p0325-and-p0330-1999-lexus-es-300","og_locale":"en_US","og_type":"article","og_title":"Knock sensor codes P0325 and P0330 1999 Lexus ES 300","og_description":"Car was throwing knock sensor codes P0325 and P0330. Check engine light on. Car radio intermittently goes off then comes back on and when that happens dash lights will sort of flicker and if headlights are on, they will turn off then comes right back on. Replaced both sensors and wiring harness. Found a rats&hellip;&nbsp;Read More &raquo;Knock sensor codes P0325 and P0330 1999 Lexus ES 300","og_url":"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/2019\/04\/knock-sensor-codes-p0325-and-p0330-1999-lexus-es-300","og_site_name":"FreeAutoMechanic Advice","article_publisher":"https:\/\/www.facebook.com\/freeautomechanic","article_published_time":"2019-04-01T15:31:05+00:00","article_modified_time":"2024-02-11T20:02:47+00:00","og_image":[{"url":"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-content\/uploads\/2016\/11\/2001-lexus-es300.jpg","type":"","width":"","height":""}],"author":"Beth Fessenden-Blackburn","twitter_card":"summary_large_image","twitter_misc":{"Written by":"Beth Fessenden-Blackburn","Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/2019\/04\/knock-sensor-codes-p0325-and-p0330-1999-lexus-es-300#article","isPartOf":{"@id":"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/2019\/04\/knock-sensor-codes-p0325-and-p0330-1999-lexus-es-300"},"author":{"name":"Beth Fessenden-Blackburn","@id":"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/#\/schema\/person\/cacb343d94f776f4118e385f43329afd"},"headline":"Knock sensor codes P0325 and P0330 1999 Lexus ES 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