{"id":53015,"date":"2017-09-18T14:05:19","date_gmt":"2017-09-18T19:05:19","guid":{"rendered":"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/?p=53015"},"modified":"2024-02-11T11:41:28","modified_gmt":"2024-02-11T19:41:28","slug":"code-p0306-2001-chevy-suburban-1500","status":"publish","type":"post","link":"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/2017\/09\/code-p0306-2001-chevy-suburban-1500","title":{"rendered":"Code P0306 2001 Chevy Suburban 1500 5.3L"},"content":{"rendered":"<p><img decoding=\"async\" class=\"alignnone size-full wp-image-33833\" src=\"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-content\/uploads\/2016\/05\/2005-chevy-suburban.jpg\" alt=\"Chevy Suburban 2005\" width=\"600\" height=\"359\" srcset=\"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-content\/uploads\/2016\/05\/2005-chevy-suburban.jpg 600w, https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-content\/uploads\/2016\/05\/2005-chevy-suburban-300x180.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/p>\n<p>I am getting code P0306 NO. 6 Cylinder <a href=\"https:\/\/www.freeautomechanic.com\/engine-misfire.html\">misfire<\/a>. I have changed out the injector, coil, spark plug wire &amp; spark plug. My car is still running rough and code still shows up. What is wrong?<\/p>\n<hr \/>\n<h3>Chevy Code P0306<\/h3>\n<p>Chevy Code P0306 means that the cylinder 6 is misfiring or is randomly misfiring. Start by checking for intake leaks and if no leaks are found the next step is to replace the spark plugs on cylinder 6.<\/p>\n<p>When a misfire occurs, engine speed will fluctuate. If the engine speed fluctuates enough to cause the Crankshaft Position (<a href=\"https:\/\/www.freeautomechanic.com\/ckp-crank-position-sensor.html\">CKP<\/a>) sensor signal to vary, the Engine Control Module (<a href=\"https:\/\/www.freeautomechanic.com\/pcm-engine-computer.html\">ECM<\/a>) can determine that a misfire is occurring.<\/p>\n<h3>Chevy Code P0306 Possible causes<\/h3>\n<ul>\n<li>Faulty spark plug 6<\/li>\n<li>Clogged or faulty fuel injector 6<\/li>\n<li>Faulty ignition coil 6<\/li>\n<li>Fuel injector 6 harness is open or shorted<\/li>\n<li>Fuel injector 6 circuit poor electrical connection<\/li>\n<li>Ignition coil 6 harness is open or shorted<\/li>\n<li>Ignition coil 6 circuit poor electrical connection<\/li>\n<li>Insufficient cylinder 6 compression<\/li>\n<li>Incorrect fuel pressure<\/li>\n<li>Intake air leak<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>I am getting code P0306 NO. 6 Cylinder misfire. I have changed out the injector, coil, spark plug wire &amp; spark plug. My car is still running rough and code still shows up. What is wrong? Chevy Code P0306 Chevy Code P0306 means that the cylinder 6 is misfiring or is randomly misfiring. Start by&hellip;&nbsp;<a href=\"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/2017\/09\/code-p0306-2001-chevy-suburban-1500\" rel=\"bookmark\">Read More &raquo;<span class=\"screen-reader-text\">Code P0306 2001 Chevy Suburban 1500 5.3L<\/span><\/a><\/p>\n","protected":false},"author":14680,"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":[1,3],"tags":[19854,19855,526],"class_list":["post-53015","post","type-post","status-publish","format-standard","hentry","category-auto-repair-questions","category-chevy","tag-chevy-code-p0306","tag-code-p0306","tag-suburban"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v23.0 (Yoast SEO v28.1) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Code P0306 2001 Chevy Suburban 1500 5.3L - FreeAutoMechanic Advice<\/title>\n<meta name=\"description\" content=\"I am getting code P0306 NO. 6 Cylinder misfire. 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