{"id":506768,"date":"2021-03-29T13:19:14","date_gmt":"2021-03-29T19:19:14","guid":{"rendered":"http:\/\/cartreatments.com\/?p=506768"},"modified":"2022-06-07T11:49:04","modified_gmt":"2022-06-07T17:49:04","slug":"p0325","status":"publish","type":"post","link":"https:\/\/cartreatments.com\/p0325\/","title":{"rendered":"P0325 Code (Symptoms, Causes, and How to Fix)"},"content":{"rendered":"<p>The last thing you want to see when you\u2019re driving down the road is the dreaded check engine light. But when it does happen, you need to quickly figure out what\u2019s going on to make sure that you\u2019re not going to cause any further damage by ignoring it.<\/p>\n<p>If after using your <a href=\"http:\/\/cartreatments.com\/best-automotive-scan-tool\/\">OBD2 scanner<\/a> you learn that you have a P0325 engine code, that\u2019s exactly what can happen if you keep driving.<\/p>\n<p>But before your heart comes plummeting out of your chest, keep reading to find out exactly what\u2019s causing your engine code. Because while it\u2019s a serious condition, it\u2019s usually pretty easy to fix.<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_39 counter-hierarchy ez-toc-counter ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" area-label=\"ez-toc-toggle-icon-1\"><label for=\"item-639b078a0b6a9\" aria-label=\"Table of Content\"><span style=\"display: flex;align-items: center;width: 35px;height: 30px;justify-content: center;direction:ltr;\"><svg style=\"fill: #23627c;color:#23627c\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #23627c;color:#23627c\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/label><input type=\"checkbox\" id=\"item-639b078a0b6a9\"><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 eztoc-visibility-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/cartreatments.com\/p0325\/#What-Does-Code-P0325-Mean\" title=\"What Does Code P0325 Mean?\">What Does Code P0325 Mean?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/cartreatments.com\/p0325\/#Symptoms-of-Code-P0325\" title=\"Symptoms of Code P0325\">Symptoms of Code P0325<\/a><ul class='ez-toc-list-level-3'><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/cartreatments.com\/p0325\/#1-Check-Engine-Light\" title=\"#1 \u2013 Check Engine Light\">#1 \u2013 Check Engine Light<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/cartreatments.com\/p0325\/#2-Noises-While-Accelerating\" title=\"#2 \u2013 Noises While Accelerating\">#2 \u2013 Noises While Accelerating<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/cartreatments.com\/p0325\/#3-Excessive-Noise-While-Running\" title=\"#3 \u2013 Excessive Noise While Running\">#3 \u2013 Excessive Noise While Running<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/cartreatments.com\/p0325\/#4-Decreased-Engine-Performance\" title=\"#4 \u2013 Decreased Engine Performance\">#4 \u2013 Decreased Engine Performance<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/cartreatments.com\/p0325\/#Causes-of-Code-P0325\" title=\"Causes of Code P0325\">Causes of Code P0325<\/a><ul class='ez-toc-list-level-3'><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/cartreatments.com\/p0325\/#1-Defective-Knock-Sensor\" title=\"#1 \u2013 Defective Knock Sensor\">#1 \u2013 Defective Knock Sensor<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/cartreatments.com\/p0325\/#2-Wiring-Issues\" title=\"#2 \u2013 Wiring Issues\">#2 \u2013 Wiring Issues<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/cartreatments.com\/p0325\/#3-Defective-EGR-System\" title=\"#3 \u2013 Defective EGR System\">#3 \u2013 Defective EGR System<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/cartreatments.com\/p0325\/#4-Excessive-Engine-Knock\" title=\"#4 \u2013 Excessive Engine Knock\">#4 \u2013 Excessive Engine Knock<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/cartreatments.com\/p0325\/#Is-Code-P0325-Serious\" title=\"Is Code P0325 Serious?\">Is Code P0325 Serious?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/cartreatments.com\/p0325\/#How-to-Fix\" title=\"How to Fix\">How to Fix<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"What-Does-Code-P0325-Mean\"><\/span>What Does Code P0325 Mean?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<div class=\"su-box su-box-style-default\" id=\"\" style=\"border-color:#076b94;border-radius:3px\"><div class=\"su-box-title\" style=\"background-color:#3a9ec7;color:#FFFFFF;border-top-left-radius:1px;border-top-right-radius:1px\">OBD-II Trouble Code P0325 Description<\/div><div class=\"su-box-content su-u-clearfix su-u-trim\" style=\"border-bottom-left-radius:1px;border-bottom-right-radius:1px\"><strong>Knock Sensor Malfunction (Sensor 1 or Bank 1)<\/strong><\/div><\/div>\n<p>When you have a code P0325, it means that your Engine Control Module <a href=\"http:\/\/cartreatments.com\/pcm-vs-ecm-ecu-tcm\/\">(ECM)<\/a> is getting readings from the knock sensor that is far outside of the normal range.<\/p>\n<p>While the issue may be coming from the engine itself, typically, there is something wrong with the circuit or sensor, leading to the errant readings.<\/p>\n<p>Either way, while the code is present, your ECM will default to a preset value, and you\u2019ll be able to continue to drive your vehicle with noticeable symptoms.<\/p>\n<p><em>Related: <a href=\"https:\/\/cartreatments.com\/p0327\/\">P0327 Code<\/a>, <a href=\"http:\/\/cartreatments.com\/p0332\/\">P0332 Code<\/a><\/em><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Symptoms-of-Code-P0325\"><\/span>Symptoms of Code P0325<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-full wp-image-505095\" src=\"http:\/\/cartreatments.com\/wp-content\/uploads\/noise-driving.jpg\" alt=\"rattling noise\" width=\"720\" height=\"405\" srcset=\"https:\/\/cartreatments.com\/wp-content\/uploads\/noise-driving.jpg 720w, https:\/\/cartreatments.com\/wp-content\/uploads\/noise-driving-200x112.jpg 200w, https:\/\/cartreatments.com\/wp-content\/uploads\/noise-driving-100x56.jpg 100w\" sizes=\"(max-width: 720px) 100vw, 720px\" \/><\/p>\n<p>While you\u2019ll always have a check engine light with a code P0325, engine noises are common too. Below we\u2019ve highlighted the four most common symptoms of a code P0325 to help you diagnose the issue and get your vehicle running like new.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"1-Check-Engine-Light\"><\/span>#1 \u2013 Check Engine Light<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>While it might seem redundant that an engine light is indicative of an engine code, sometimes it\u2019s the only noticeable sign.<\/p>\n<p>While that\u2019s rare, it\u2019s not rare for an unobservant driver not to notice any of the other symptoms beside that <a href=\"http:\/\/cartreatments.com\/how-to-reset-check-engine-light\/\">Check Engine light<\/a> that illuminates in your dash.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"2-Noises-While-Accelerating\"><\/span>#2 \u2013 Noises While Accelerating<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>When your vehicle has a knock sensor code, it automatically reverts to default values. While this helps protect the engine from further damages, it also throws off the timing a bit. This lag is especially <a href=\"http:\/\/cartreatments.com\/car-hesitates-when-accelerating\/\">noticeable during acceleration<\/a>.<\/p>\n<p>If you listen you\u2019ll likely hear a pinging sound as you accelerate. The longer you leave this problem unaddressed, the louder the sound will become.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"3-Excessive-Noise-While-Running\"><\/span>#3 \u2013 Excessive Noise While Running<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>While noises are most common during acceleration, it\u2019s possible to hear sounds whenever the engine is running. This is especially true if you have a code P0325 because of an underlying engine condition instead of a faulty knock sensor.<\/p>\n<p>If you hear unnatural engine noises while the engine is idling, it\u2019s critical that you take your vehicle in for repairs as soon as possible. Failure to do so can quickly lead to additional damage to your engine.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"4-Decreased-Engine-Performance\"><\/span>#4 \u2013 Decreased Engine Performance<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>When your engine defaults to preset values, one of the first things to go is engine performance. You\u2019ll have a noticeable drop in your ability to accelerate, but you\u2019re also going to have a drop in fuel economy.<\/p>\n<p>While this might seem like a bad thing, it\u2019s actually giving you more time to get your vehicle to a repair shop before further damages occur.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Causes-of-Code-P0325\"><\/span>Causes of Code P0325<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-full wp-image-504462\" src=\"http:\/\/cartreatments.com\/wp-content\/uploads\/2016\/05\/bad-knock-sensor-symptoms.jpg\" alt=\"bad knock sensor symptoms\" width=\"720\" height=\"405\" srcset=\"https:\/\/cartreatments.com\/wp-content\/uploads\/2016\/05\/bad-knock-sensor-symptoms.jpg 720w, https:\/\/cartreatments.com\/wp-content\/uploads\/2016\/05\/bad-knock-sensor-symptoms-200x112.jpg 200w, https:\/\/cartreatments.com\/wp-content\/uploads\/2016\/05\/bad-knock-sensor-symptoms-100x56.jpg 100w\" sizes=\"(max-width: 720px) 100vw, 720px\" \/><\/p>\n<p>While the most common cause of a code P0325 is a defective knock sensor, that\u2019s not the only thing that could be giving you problems. Below we\u2019ve highlighted the four most common causes of a code P0325 that you should check out before you try replacing any parts.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"1-Defective-Knock-Sensor\"><\/span>#1 \u2013 Defective Knock Sensor<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>A <a href=\"http:\/\/cartreatments.com\/bad-knock-sensor-symptoms-function\/\">defective knock sensor <\/a>is by far the most common symptom of a P0325 engine code. When the check engine light turns on, the ECM defaults to standard values, which is why engine performance decreases and engine noises can result.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"2-Wiring-Issues\"><\/span>#2 \u2013 Wiring Issues<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>It doesn\u2019t matter if the sensor is working correctly if there is excessive corrosion or frayed wires. It\u2019s not uncommon for a mechanic to spend a few days driving themselves crazy trying to figure out what\u2019s going on when there\u2019s a wiring issue.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"3-Defective-EGR-System\"><\/span>#3 \u2013 Defective EGR System<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Your <a href=\"http:\/\/cartreatments.com\/egr-valve-symptoms-replacement-cost\/\">EGR system<\/a> does more than just emissions &#8211; it also keeps your engine performance-optimized. But when things aren\u2019t running the way they should, it\u2019s not uncommon for the engine to start making noises that it shouldn\u2019t.<\/p>\n<p>When that happens, a code P0325 can result. The sensor is working the way that it should &#8211; your engine is just making noises that it shouldn\u2019t.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"4-Excessive-Engine-Knock\"><\/span>#4 \u2013 Excessive Engine Knock<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Just like a defective EGR system can cause an engine knock, many conditions can lead to excessive engine noises. Broken components, a mistimed engine, and compression leaks are just a few issues that could be happening.<\/p>\n<p>However, keep in mind a code P0325 typically only comes on when the readings are far out of a typical reading. So, a slight engine knock won\u2019t usually cause this code.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Is-Code-P0325-Serious\"><\/span>Is Code P0325 Serious?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>A P0325 code is a very serious engine code. If you leave a P0325 engine code unrepaired and continue to drive your vehicle, the problem will worsen. Furthermore, you can expect that the code to have adverse effects on your vehicle\u2019s performance.<\/p>\n<p>That means even if you\u2019re lucky and the damage doesn\u2019t get worse right away, you could still find yourself in an accident because your vehicle isn\u2019t performing like you\u2019re used to.<\/p>\n<p>If you have a code P0325, don\u2019t delay taking it to the shop, you\u2019re only asking for more significant problems to come up.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"How-to-Fix\"><\/span>How to Fix<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-full wp-image-509907\" src=\"https:\/\/cartreatments.com\/wp-content\/uploads\/test-knock-sensor.jpg\" alt=\"test knock sensor\" width=\"720\" height=\"405\" srcset=\"https:\/\/cartreatments.com\/wp-content\/uploads\/test-knock-sensor.jpg 720w, https:\/\/cartreatments.com\/wp-content\/uploads\/test-knock-sensor-200x112.jpg 200w, https:\/\/cartreatments.com\/wp-content\/uploads\/test-knock-sensor-100x56.jpg 100w, https:\/\/cartreatments.com\/wp-content\/uploads\/test-knock-sensor-213x120.jpg 213w\" sizes=\"(max-width: 720px) 100vw, 720px\" \/><\/p>\n<p>While the only surefire way to replace the right part the first time is to hook up an <a href=\"http:\/\/cartreatments.com\/best-automotive-scan-tool\/\">automotive scan tool<\/a> and see exactly what\u2019s going on, if you\u2019re looking to take a risk and potentially save a few bucks, you can try replacing the knock sensor and hoping that was the problem.<\/p>\n<p>However, if it\u2019s not, you\u2019ll need to start a little more troubleshooting. Double-check the wiring and use a multimeter to determine if you have excessive resistance in the circuit and ensure that you have power when you\u2019re supposed to.<\/p>\n<p>If you\u2019re still not finding the cause of your problem, you might need to take it to a mechanic. They\u2019ll be able to hook up all the proper diagnostic equipment to get a better look at what\u2019s going on inside your engine.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The last thing you want to see when you\u2019re driving down the road is the dreaded check engine light. But when it does happen, you need to quickly figure out what\u2019s going on to make sure that you\u2019re not going &#8230; <a title=\"P0325 Code (Symptoms, Causes, and How to Fix)\" class=\"read-more\" href=\"https:\/\/cartreatments.com\/p0325\/\" aria-label=\"More on P0325 Code (Symptoms, Causes, and How to Fix)\">Read more<\/a><\/p>\n","protected":false},"author":1009,"featured_media":506121,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_lmt_disableupdate":"no","_lmt_disable":"no"},"categories":[320],"tags":[279,100343],"modified_by":"Mark Stevens","_links":{"self":[{"href":"https:\/\/cartreatments.com\/wp-json\/wp\/v2\/posts\/506768"}],"collection":[{"href":"https:\/\/cartreatments.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cartreatments.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cartreatments.com\/wp-json\/wp\/v2\/users\/1009"}],"replies":[{"embeddable":true,"href":"https:\/\/cartreatments.com\/wp-json\/wp\/v2\/comments?post=506768"}],"version-history":[{"count":0,"href":"https:\/\/cartreatments.com\/wp-json\/wp\/v2\/posts\/506768\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cartreatments.com\/wp-json\/wp\/v2\/media\/506121"}],"wp:attachment":[{"href":"https:\/\/cartreatments.com\/wp-json\/wp\/v2\/media?parent=506768"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cartreatments.com\/wp-json\/wp\/v2\/categories?post=506768"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cartreatments.com\/wp-json\/wp\/v2\/tags?post=506768"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}