{"id":58449,"date":"2019-11-08T06:22:03","date_gmt":"2019-11-08T14:22:03","guid":{"rendered":"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/?p=58449"},"modified":"2019-11-08T06:22:06","modified_gmt":"2019-11-08T14:22:06","slug":"code-p0325-knock-sensor-2004-honda-civic","status":"publish","type":"post","link":"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/2019\/11\/code-p0325-knock-sensor-2004-honda-civic","title":{"rendered":"Code P0325 Knock Sensor 2004 Honda Civic"},"content":{"rendered":"<p><img decoding=\"async\" class=\"alignnone size-full wp-image-34338\" src=\"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-content\/uploads\/2016\/02\/2004-honda-civic-hybrid.jpg\" alt=\"2004 Honda Civic\" width=\"600\" height=\"450\" srcset=\"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-content\/uploads\/2016\/02\/2004-honda-civic-hybrid.jpg 600w, https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-content\/uploads\/2016\/02\/2004-honda-civic-hybrid-300x225.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/p>\n<p>Check engine light came on with code po325 knock sensor; is this why the car is vibrating on idle?\u00a0 already replaced front engine mount.<\/p>\n<hr \/>\n<p><!-- In-Article --><ins class=\"adsbygoogle\" style=\"display: block; text-align: center;\" data-ad-layout=\"in-article\" data-ad-format=\"fluid\" data-ad-client=\"ca-pub-5950293074584657\" data-ad-slot=\"3814845838\"><\/ins> <script>\n     (adsbygoogle = window.adsbygoogle || []).push({});\n<\/script><\/p>\n<hr \/>\n<p>It is a possibility that the code P0325 is causing the vibration at idle. Depending on the signal the engines computer receives from the <a href=\"https:\/\/www.freeautomechanic.com\/ks-knock-sensor.html\">knock sensor<\/a> it will advance or retard the ignition timing.<\/p>\n<h4>Time Saver Tip<\/h4>\n<p>If you decide you need to replace the <a href=\"https:\/\/www.freeautomechanic.com\/ks-knock-sensor.html\">knock sensor<\/a> check out the video below to avoid having to remove the intake manifold as instructed in the <a href=\"https:\/\/www.freeautomechanic.com\/repairmanuals.html\">repair manual<\/a>.<\/p>\n<h3>Honda Code P0325<\/h3>\n<h5>Code P0325 &#8211; Knock Sensor 1 Circuit Bank 1 or Single Sensor<\/h5>\n<h6>DTC P0325 Knock Sensor Circuit Malfunction<\/h6>\n<ol>\n<li>Reset the <a href=\"https:\/\/www.freeautomechanic.com\/pcm-engine-computer.html\">ECM\/PCM<\/a><\/li>\n<li>Start the engine. Hold the engine at 3,000 rpm without load(in Park or neutral) until the <a href=\"https:\/\/www.freeautomechanic.com\/cooling-system-fan.html\">radiator fan<\/a> comes on, then let it idle.<\/li>\n<li>Hold the engine at 3,000-4,000 rpm for at least 10 seconds.\n<ul>Is DTC P0325 Indicated?<\/ul>\n<ul>YES &#8211; Go to step 4.<\/ul>\n<ul>No &#8211; Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the knock sensor and at the ECM\/PCM.<\/ul>\n<\/li>\n<li>Turn the ignition OFF.<\/li>\n<li>Disconnect the knock sensor 3P connector.<\/li>\n<li>Turn the ignition switch ON.<\/li>\n<li>Measure the voltage between knock sensor 3P connector terminal No. 1 and body ground.\n<ul>Is there about 5V?<\/ul>\n<ul>YES &#8211; Go to step 12.<\/ul>\n<ul>No &#8211; Go to step 8.<\/ul>\n<\/li>\n<li>Measure voltage between ECM\/PCM connector terminal A9 and body ground.\n<ul>Is there about 5V?<\/ul>\n<ul>YES &#8211; Repair open in the wire between the ECM\/PCM (A9) and knock sensor.<\/ul>\n<ul>No &#8211; Go to step 9.<\/ul>\n<\/li>\n<li>Turn the ignition OFF.<\/li>\n<li>Disconnect ECM\/PCM connector A (31P) from the ECM\/PCM.<\/li>\n<li>Check for continuity between ECM\/PCM connector terminal A9 and body ground.\n<ul>Is there continuity?<\/ul>\n<ul>YES &#8211; Repair short in the wire between the ECM\/PCM (A9) and knock sensor.<\/ul>\n<ul>No &#8211; Update the ECM\/PCM if it does not have the latest software, or substitute a known-good ECM\/PCM, then recheck. If the symptom\/indication goes away with a known-good ECM\/PCM, replace the original ECM\/PCM.<\/ul>\n<\/li>\n<li>Substitute a known-good knock sensor and recheck.\n<ul>Is DTC P0325 indicated?<\/ul>\n<ul>YES &#8211; Update the ECM\/PCM if it does not have the latest software, or substitute a known-good ECM\/PCM, then recheck. If the symptom\/indication goes away with a known-good ECM\/PCM, replace the original ECM\/PCM..<\/ul>\n<ul>No &#8211; Replace the original knock sensor.<\/ul>\n<\/li>\n<\/ol>\n<h4>How to replace the Knock Sensor without removing the Intake Manifold.<\/h4>\n<div class=\"lyte-wrapper fourthree\" title=\"5 minute video on how to install a knock sensor on a 2001-2005 Honda Civic Si\" style=\"width:420px;max-width:100%;margin:5px;\"><div class=\"lyMe hidef\" id=\"WYL_ZijHrK4DqOU\" itemprop=\"video\" itemscope itemtype=\"https:\/\/schema.org\/VideoObject\"><div><meta itemprop=\"thumbnailUrl\" content=\"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-content\/plugins\/wp-youtube-lyte\/lyteCache.php?origThumbUrl=https%3A%2F%2Fi.ytimg.com%2Fvi%2FZijHrK4DqOU%2Fmaxresdefault.jpg\" \/><meta itemprop=\"embedURL\" content=\"https:\/\/www.youtube.com\/embed\/ZijHrK4DqOU\" \/><meta itemprop=\"duration\" content=\"PT5M4S\" \/><meta itemprop=\"uploadDate\" content=\"2018-11-24T01:56:28Z\" \/><\/div><div id=\"lyte_ZijHrK4DqOU\" data-src=\"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-content\/plugins\/wp-youtube-lyte\/lyteCache.php?origThumbUrl=https%3A%2F%2Fi.ytimg.com%2Fvi%2FZijHrK4DqOU%2Fmaxresdefault.jpg\" class=\"pL\"><div class=\"tC\"><div class=\"tT\" itemprop=\"name\">5 minute video on how to install a knock sensor on a 2001-2005 Honda Civic Si<\/div><\/div><div class=\"play\"><\/div><div class=\"ctrl\"><div class=\"Lctrl\"><\/div><div class=\"Rctrl\"><\/div><\/div><\/div><noscript><a href=\"https:\/\/youtu.be\/ZijHrK4DqOU\" rel=\"nofollow\"><img decoding=\"async\" src=\"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-content\/plugins\/wp-youtube-lyte\/lyteCache.php?origThumbUrl=https%3A%2F%2Fi.ytimg.com%2Fvi%2FZijHrK4DqOU%2F0.jpg\" alt=\"5 minute video on how to install a knock sensor on a 2001-2005 Honda Civic Si\" width=\"420\" height=\"295\" \/><br \/>Watch this video on YouTube<\/a><\/noscript><meta itemprop=\"description\" content=\"A quick video on how to install the knock sensor (ks) for average Honda K series motors. You&#039;re supposed to take the intake manifold off, but I didn&#039;t. In fact, it took me all of 10 minutes.\"><\/div><\/div><div class=\"lL\" style=\"max-width:100%;width:420px;margin:5px;\"><\/div><\/p>\n<h6>Purchase Knock Sensor<\/h6>\n<p>I looked this one up for a 2004 Honda Civic SI<\/p>\n<p><iframe style=\"width: 120px; height: 240px;\" src=\"\/\/ws-na.amazon-adsystem.com\/widgets\/q?ServiceVersion=20070822&amp;OneJS=1&amp;Operation=GetAdHtml&amp;MarketPlace=US&amp;source=ss&amp;ref=as_ss_li_til&amp;ad_type=product_link&amp;tracking_id=freea08-20&amp;language=en_US&amp;marketplace=amazon&amp;region=US&amp;placement=B003ULRAOK&amp;asins=B003ULRAOK&amp;linkId=e72b9e4a2f31f3f247197a4e271ecfec&amp;show_border=true&amp;link_opens_in_new_window=true\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\"><\/iframe><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Check engine light came on with code po325 knock sensor; is this why the car is vibrating on idle?\u00a0 already replaced front engine mount. It is a possibility that the code P0325 is causing the vibration at idle. Depending on the signal the engines computer receives from the knock sensor it will advance or retard&hellip;&nbsp;<a href=\"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/2019\/11\/code-p0325-knock-sensor-2004-honda-civic\" rel=\"bookmark\">Read More &raquo;<span class=\"screen-reader-text\">Code P0325 Knock Sensor 2004 Honda Civic<\/span><\/a><\/p>\n","protected":false},"author":15478,"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":[1,4],"tags":[394,22924,23986,23987,23985],"class_list":["post-58449","post","type-post","status-publish","format-standard","hentry","category-auto-repair-questions","category-honda","tag-civic","tag-code-p0325","tag-code-po325","tag-honda-code-p0325","tag-p0325"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v23.0 (Yoast SEO v27.1.1) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Code P0325 Knock Sensor 2004 Honda Civic - 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\/11\/code-p0325-knock-sensor-2004-honda-civic\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Code P0325 Knock Sensor 2004 Honda Civic\" \/>\n<meta property=\"og:description\" content=\"Check engine light came on with code po325 knock sensor; is this why the car is vibrating on idle?\u00a0 already replaced front engine mount. It is a possibility that the code P0325 is causing the vibration at idle. 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It is a possibility that the code P0325 is causing the vibration at idle. Depending on the signal the engines computer receives from the knock sensor it will advance or retard&hellip;&nbsp;Read More &raquo;Code P0325 Knock Sensor 2004 Honda Civic","og_url":"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/2019\/11\/code-p0325-knock-sensor-2004-honda-civic","og_site_name":"FreeAutoMechanic Advice","article_publisher":"https:\/\/www.facebook.com\/freeautomechanic","article_published_time":"2019-11-08T14:22:03+00:00","article_modified_time":"2019-11-08T14:22:06+00:00","og_image":[{"url":"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-content\/uploads\/2016\/02\/2004-honda-civic-hybrid.jpg","type":"","width":"","height":""}],"author":"Jak Pak","twitter_card":"summary_large_image","twitter_misc":{"Written by":"Jak Pak","Est. reading time":"2 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