{"id":40403,"date":"2022-05-13T05:01:18","date_gmt":"2022-05-13T05:01:18","guid":{"rendered":" https:\/\/dev.way.com\/blog\/?p=40403"},"modified":"2022-05-13T05:01:18","modified_gmt":"2022-05-13T05:01:18","slug":"p0303-code-causes-symptoms-costs","status":"publish","type":"post","link":"https:\/\/dev.way.com\/journal\/p0303-code-causes-symptoms-costs\/","title":{"rendered":"How to Fix a P0303 Code \u2013 Causes, Symptoms and Cost"},"content":{"rendered":"<p style=\"text-align: center;\"><em><span data-preserver-spaces=\"true\">How do I resolve error code P0303? It&#8217;s a straightforward question.\u00a0<\/span><\/em><em><span data-preserver-spaces=\"true\">Unfortunately, there may not be a straightforward remedy, as with many problem codes. We at Way.com appreciate the value of having a fully operating car, and we also realize how frustrating and stressful these little error codes can be.\u00a0<\/span><\/em><\/p>\n<p><span data-preserver-spaces=\"true\">Cars today are extremely complex, relying heavily on a web of interconnected electronic systems to ensure proper operation. As a result, modern cars are as computer and data-driven as mechanical. <\/span><span data-preserver-spaces=\"true\">Today&#8217;s cars can store one or more fault codes when a malfunction occurs. These trouble codes can be useful in determining the source of the problem and reducing vehicle downtime.<\/span><\/p>\n<p><span data-preserver-spaces=\"true\">Let&#8217;s look at the P0303 error code and what it can signify for your car and your wallet.<\/span><\/p>\n<p><img decoding=\"async\" class=\"aligncenter\" src=\"https:\/\/media1.giphy.com\/media\/4158Icix1RBzgWmvyd\/200w.gif?cid=ecf05e47qp67lqqlfp7yp5k0jiy3osfrd720bpgnshlsr2jy&amp;rid=200w.gif&amp;ct=g\" alt=\"Warning Light Neon GIF\" \/><\/p>\n<p style=\"text-align: center;\"><a href=\"https:\/\/giphy.com\/search\/car-engine-light\">via GIPHY<\/a><\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_85 counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">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\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #e71346;color:#e71346\" 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: #e71346;color:#e71346\" 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><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/dev.way.com\/journal\/p0303-code-causes-symptoms-costs\/#P0303_Code_Significance\" >P0303 Code Significance<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/dev.way.com\/journal\/p0303-code-causes-symptoms-costs\/#What_is_the_cause_of_the_P0303_Code\" >What is the cause of the P0303 Code?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/dev.way.com\/journal\/p0303-code-causes-symptoms-costs\/#What_to_look_out_for_in_the_P0303_Code\" >What to look out for in the P0303 Code?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/dev.way.com\/journal\/p0303-code-causes-symptoms-costs\/#How_serious_is_the_P0303_Code\" >How serious is the P0303 Code?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/dev.way.com\/journal\/p0303-code-causes-symptoms-costs\/#Diagnosis_of_P0303_Code\" >Diagnosis of P0303 Code<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/dev.way.com\/journal\/p0303-code-causes-symptoms-costs\/#Common_Mistakes_to_Avoid\" >Common Mistakes to Avoid<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/dev.way.com\/journal\/p0303-code-causes-symptoms-costs\/#Fixing_a_P0303_Code\" >Fixing a P0303 Code<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/dev.way.com\/journal\/p0303-code-causes-symptoms-costs\/#Cost_of_repairing_a_car_with_Code_P0303_issues\" >Cost of repairing a car with Code P0303 issues<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"P0303_Code_Significance\"><\/span><span data-preserver-spaces=\"true\">P0303 Code Significance<\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span data-preserver-spaces=\"true\">&#8220;What does the code P0303 mean?&#8221; is probably the first question on your mind. Unfortunately, this is a typical error message on OBD-II enabled cars and pertains to powertrain difficulties. However, the Code does not always allude to specific measures that should be taken, as these will vary depending on your vehicle&#8217;s make and model.\u00a0<\/span><\/p>\n<p><span data-preserver-spaces=\"true\">However, the Code indicates that the car&#8217;s computer system has detected a problem with at least one cylinder. The computer system in this situation of error code P0303 is informing the driver that cylinder number three is not firing properly.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-40407 size-large\" src=\"https:\/\/blog.way.com\/wp-content\/uploads\/2022\/05\/Depositphotos_25383553_XL-min-1024x704.jpg\" alt=\"P0303 Code Significance\" width=\"640\" height=\"440\" srcset=\"http:\/\/wordwblog02.way.com\/wp-content\/uploads\/2022\/05\/Depositphotos_25383553_XL-min-1024x704.jpg 1024w, http:\/\/wordwblog02.way.com\/wp-content\/uploads\/2022\/05\/Depositphotos_25383553_XL-min-300x206.jpg 300w, http:\/\/wordwblog02.way.com\/wp-content\/uploads\/2022\/05\/Depositphotos_25383553_XL-min-768x528.jpg 768w, http:\/\/wordwblog02.way.com\/wp-content\/uploads\/2022\/05\/Depositphotos_25383553_XL-min-1536x1057.jpg 1536w, http:\/\/wordwblog02.way.com\/wp-content\/uploads\/2022\/05\/Depositphotos_25383553_XL-min-2048x1409.jpg 2048w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><\/p>\n<h2><span class=\"ez-toc-section\" id=\"What_is_the_cause_of_the_P0303_Code\"><\/span><span data-preserver-spaces=\"true\">What is the cause of the P0303 Code?<\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span data-preserver-spaces=\"true\">While it is usually preferable when the source of a problem is obvious and straightforward to repair, this error code can be caused by various variables ranging from inexpensive to costly.\u00a0<\/span><\/p>\n<p><span data-preserver-spaces=\"true\">For example, the problem could be caused by a defective spark plug or wire, which is quite simple to fix in the great scheme of things. However, the error code could be caused by a damaged catalytic converter or computer system, which can be costly.\u00a0<\/span><\/p>\n<p><span data-preserver-spaces=\"true\">There are, however, a variety of different options.<\/span><\/p>\n<ul>\n<li><span data-preserver-spaces=\"true\">Coil failure<\/span><\/li>\n<li><span data-preserver-spaces=\"true\">Fuel injector failure<\/span><\/li>\n<li><span data-preserver-spaces=\"true\">Oxygen sensor failure Poor compression<\/span><\/li>\n<li><span data-preserver-spaces=\"true\">Exhaust valve on the fire<\/span><\/li>\n<li><span data-preserver-spaces=\"true\">Low or non-existent fuel<\/span><\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"What_to_look_out_for_in_the_P0303_Code\"><\/span><span data-preserver-spaces=\"true\">What to look out for in the P0303 Code?<\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span data-preserver-spaces=\"true\">While everything seems clearer now, it is still beneficial to be aware of the potential warning signals of this issue. For example, if your engine is more difficult to start, or if it stumbles or hesitates when turned on, it could be a sign that one of your cylinders isn&#8217;t working properly.\u00a0<\/span><\/p>\n<p><span data-preserver-spaces=\"true\">However, locating the precise cylinder can be difficult without the help of the problem code message. So if you&#8217;re having trouble with your car but don&#8217;t see an error code, you should get it checked out.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-40408 size-large\" src=\"https:\/\/blog.way.com\/wp-content\/uploads\/2022\/05\/Depositphotos_26934597_XL-min-1024x683.jpg\" alt=\"How serious is the P0303 Code?\" width=\"640\" height=\"427\" srcset=\"http:\/\/wordwblog02.way.com\/wp-content\/uploads\/2022\/05\/Depositphotos_26934597_XL-min-1024x683.jpg 1024w, http:\/\/wordwblog02.way.com\/wp-content\/uploads\/2022\/05\/Depositphotos_26934597_XL-min-300x200.jpg 300w, http:\/\/wordwblog02.way.com\/wp-content\/uploads\/2022\/05\/Depositphotos_26934597_XL-min-768x512.jpg 768w, http:\/\/wordwblog02.way.com\/wp-content\/uploads\/2022\/05\/Depositphotos_26934597_XL-min-1536x1024.jpg 1536w, http:\/\/wordwblog02.way.com\/wp-content\/uploads\/2022\/05\/Depositphotos_26934597_XL-min-2048x1365.jpg 2048w, http:\/\/wordwblog02.way.com\/wp-content\/uploads\/2022\/05\/Depositphotos_26934597_XL-min-600x400.jpg 600w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><\/p>\n<h2><span class=\"ez-toc-section\" id=\"How_serious_is_the_P0303_Code\"><\/span><span data-preserver-spaces=\"true\">How serious is the P0303 Code?<\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span data-preserver-spaces=\"true\">Code P0303 is generally thought to be fairly severe. There are two main reasons for this generalization. First, a slew of driveability difficulties often accompanies code P0303, but an unresolved misfire can also lead to a slew of secondary issues over time.<\/span><\/p>\n<p><span data-preserver-spaces=\"true\">Unburned fuel is sent downstream, through a car&#8217;s exhaust, when fuel is not combusted as intended, such as in a cylinder misfire. After that, the fuel is superheated, causing damage to many components, including the catalytic converter. <\/span><span data-preserver-spaces=\"true\">A P0303 misfire code should be resolved as quickly as possible to reduce the danger of further damage. If you are unsure about diagnosing an issue on your own, take your vehicle to a reputable service center as soon as possible.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Diagnosis_of_P0303_Code\"><\/span><span data-preserver-spaces=\"true\">Diagnosis of P0303 Code<\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span data-preserver-spaces=\"true\">A mechanic can detect a cylinder three misfiring problem in a few different ways:<\/span><\/p>\n<ul>\n<li><span data-preserver-spaces=\"true\">The mechanic can use their scan tool to examine the vehicle for any current, pending, or history codes.<\/span><\/li>\n<li><span data-preserver-spaces=\"true\">They can then take that freeze frame data when they test drive the car.<\/span><\/li>\n<li><span data-preserver-spaces=\"true\">The mechanic will next clear all of the codes from the OBD2 while driving the car to confirm any faults that could indicate a P0303 trouble code.<\/span><\/li>\n<li><span data-preserver-spaces=\"true\">They should then conduct a thorough visual inspection to search for any broken components, wear and tear, leaks, and damaged wiring that could be the source of the problem or the code.<\/span><\/li>\n<li><span data-preserver-spaces=\"true\">The mechanic will then use an OBD2 scan tool to verify the cylinder three misfire counter during operation.<\/span><\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Common_Mistakes_to_Avoid\"><\/span><span data-preserver-spaces=\"true\">Common Mistakes to Avoid<\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span data-preserver-spaces=\"true\">There will be an opportunity for error and blunders when diagnosing and correcting the cylinder three misfiring issues if these diagnosis stages are not followed properly. The most typical blunder is neglecting fuel or air intake leaks as the primary cause of the misfire. Even though spark plugs are the most typical source of this error code, they are not the primary cause of cylinder three misfirings.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-40409 size-large\" src=\"https:\/\/blog.way.com\/wp-content\/uploads\/2022\/05\/Depositphotos_211943650_XL-min-1024x683.jpg\" alt=\"Common Mistakes to Avoid\" width=\"640\" height=\"427\" srcset=\"http:\/\/wordwblog02.way.com\/wp-content\/uploads\/2022\/05\/Depositphotos_211943650_XL-min-1024x683.jpg 1024w, http:\/\/wordwblog02.way.com\/wp-content\/uploads\/2022\/05\/Depositphotos_211943650_XL-min-300x200.jpg 300w, http:\/\/wordwblog02.way.com\/wp-content\/uploads\/2022\/05\/Depositphotos_211943650_XL-min-768x513.jpg 768w, http:\/\/wordwblog02.way.com\/wp-content\/uploads\/2022\/05\/Depositphotos_211943650_XL-min-1536x1025.jpg 1536w, http:\/\/wordwblog02.way.com\/wp-content\/uploads\/2022\/05\/Depositphotos_211943650_XL-min-2048x1367.jpg 2048w, http:\/\/wordwblog02.way.com\/wp-content\/uploads\/2022\/05\/Depositphotos_211943650_XL-min-600x400.jpg 600w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Fixing_a_P0303_Code\"><\/span><span data-preserver-spaces=\"true\">Fixing a P0303 Code<\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span data-preserver-spaces=\"true\">If you&#8217;re experiencing hesitancy or stumbling of the engine in addition to the error number, the issue is most likely with the spark plugs or wiring.\u00a0<\/span><\/p>\n<p><span data-preserver-spaces=\"true\">Check that the connectors and wiring leading to the malfunctioning cylinder are secure and in excellent working order.\u00a0<\/span><span data-preserver-spaces=\"true\">However, replacing these ignition components as routine maintenance may be useful depending on the car&#8217;s age. It&#8217;s also possible that the catalytic converter has failed.\u00a0<\/span><\/p>\n<p><span data-preserver-spaces=\"true\">If the exhaust smells like rotten eggs, you may be sure this is the case.\u00a0<\/span><span data-preserver-spaces=\"true\">It is advisable to analyze your skills before attempting any of these replacements because you do not want to cause any additional damage to your car. In certain cases, though, the computer has just failed and needs to be reset.<\/span><\/p>\n<p><span data-preserver-spaces=\"true\">The P0303 OBD-II scanner error code can be aggravating. However, with time and the required expertise, you can find the source of the problem and restore your car to its full capacity.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Cost_of_repairing_a_car_with_Code_P0303_issues\"><\/span><span data-preserver-spaces=\"true\">Cost of repairing a car with Code P0303 issues<\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span data-preserver-spaces=\"true\">For $120, hire a licensed car mechanic to come to your home or workplace and perform a Check Engine Light diagnostic.\u00a0<\/span><span data-preserver-spaces=\"true\">These prices include components and labor and are based on national averages. Your pricing will vary depending on your location and vehicle type.<\/span><\/p>\n<ul>\n<li><span data-preserver-spaces=\"true\">Spark plugs: $66-$250<\/span><\/li>\n<li><span data-preserver-spaces=\"true\">Ignition Coils: $230-$640<\/span><\/li>\n<li><span data-preserver-spaces=\"true\">Spark plug wires: $180-$240<\/span><\/li>\n<li><span data-preserver-spaces=\"true\">Fuel injectors: $1500-$1900<\/span><\/li>\n<li><span data-preserver-spaces=\"true\">Vacuum leak: $100-$200<\/span><\/li>\n<li><span data-preserver-spaces=\"true\">Fuel pump: $1300-$1700<\/span><\/li>\n<li><span data-preserver-spaces=\"true\">Fuel pressure regulator: $200-$400<\/span><\/li>\n<\/ul>\n<p><a href=\"https:\/\/www.way.com\/way-plus\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter\" src=\"https:\/\/blog.way.com\/wp-content\/uploads\/2021\/08\/1148169_BlogAdBanner_Opt8_970x90px_V01_080921.jpg\" alt=\"Save on car services with Way.com\" width=\"970\" height=\"90\" \/><\/a><\/p>\n<hr \/>\n<p style=\"text-align: center;\"><em>Here\u2019s more info on\u00a0<a tabindex=\"-1\" title=\"https:\/\/www.way.com\/airport-parking\" href=\"https:\/\/www.way.com\/airport-parking\" target=\"_blank\" rel=\"noopener noreferrer\" aria-label=\"Link top-rated airport parking\">top-rated airport parking<\/a>,\u00a0<a tabindex=\"-1\" title=\"https:\/\/www.way.com\/cities\" href=\"https:\/\/www.way.com\/cities\" target=\"_blank\" rel=\"noopener noreferrer\" aria-label=\"Link the best parking spots in your city\">the best parking spots in your city<\/a>, affordable\u00a0<a tabindex=\"-1\" title=\"https:\/\/www.way.com\/auto-insurance\" href=\"https:\/\/www.way.com\/auto-insurance\" target=\"_blank\" rel=\"noopener noreferrer\" aria-label=\"Link auto insurance\">auto insurance<\/a>, easy\u00a0<a tabindex=\"-1\" title=\"https:\/\/www.way.com\/auto-refinance\" href=\"https:\/\/www.way.com\/auto-refinance\" target=\"_blank\" rel=\"noopener noreferrer\" aria-label=\"Link auto refinance\">auto refinance<\/a>,\u00a0and\u00a0<a tabindex=\"-1\" title=\"https:\/\/www.way.com\/car-wash-near-me\" href=\"https:\/\/www.way.com\/car-wash-near-me\" target=\"_blank\" rel=\"noopener noreferrer\" aria-label=\"Link high-quality car washes near you\">high-quality car washes near you<\/a>.\u00a0<\/em><\/p>\n<hr \/>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>How do I resolve error code P0303? It&#8217;s a straightforward question.\u00a0Unfortunately, there may not be a straightforward remedy, as with many problem codes. We at Way.com appreciate the value of having a fully operating car, and we also realize how frustrating and stressful these little error codes can be.\u00a0 Cars today are extremely complex, relying&hellip; <a class=\"more-link\" href=\"https:\/\/dev.way.com\/journal\/p0303-code-causes-symptoms-costs\/\">Continue reading <span class=\"screen-reader-text\">How to Fix a P0303 Code \u2013 Causes, Symptoms and Cost<\/span><\/a><\/p>\n","protected":false},"author":46,"featured_media":40406,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1,5676,5276],"tags":[],"class_list":["post-40403","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cars-explained","category-engine-codes","category-catalytic-converter","entry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v20.3 (Yoast SEO v28.0) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>P0303 Code: What to look out for and how to deal with it?<\/title>\n<meta name=\"description\" content=\"How do I resolve error code P0303? It&#039;s a straightforward question.\u00a0Unfortunately, there may not be a straightforward answer.\" \/>\n<meta name=\"robots\" content=\"noindex, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How to Fix a P0303 Code \u2013 Causes, Symptoms and Cost\" \/>\n<meta property=\"og:description\" content=\"How do I resolve error code P0303? 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