{"id":53472,"date":"2017-10-24T08:13:17","date_gmt":"2017-10-24T13:13:17","guid":{"rendered":"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/?p=53472"},"modified":"2017-10-24T08:13:17","modified_gmt":"2017-10-24T13:13:17","slug":"oil-pressure-sensor-2002-dodge-ram-1500","status":"publish","type":"post","link":"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/2017\/10\/oil-pressure-sensor-2002-dodge-ram-1500","title":{"rendered":"Oil pressure sensor 2002 Dodge Ram 1500 6 cyl"},"content":{"rendered":"<p><img decoding=\"async\" class=\"alignnone size-full wp-image-36212\" src=\"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-content\/uploads\/2016\/08\/2002-dodge-ram-1500.jpg\" alt=\"2002 Dodge Ram 1500\" width=\"600\" height=\"247\" srcset=\"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-content\/uploads\/2016\/08\/2002-dodge-ram-1500.jpg 600w, https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-content\/uploads\/2016\/08\/2002-dodge-ram-1500-300x124.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/p>\n<p>Oil pressure gauge drops to zero then back to half normal pressure after engine warms up. Has good pressure when first cranked ? Is oil sending unit on exterior or interior of motor ?<\/p>\n<hr \/>\n<p>Most common cause for this would be a faulty oil pressure sending unit. It is a fairly in expensive part and would be the first place to look. Check the connections and if any sign of oil is around, replace it.<\/p>\n<h3>\nOil Pressure Sensor Description<\/h3>\n<p>The 3\u2013wire, solid-state engine oil pressure sensor (sending unit) is located in an engine oil pressure gallery.<\/p>\n<h4>Operation<\/h4>\n<p>The oil pressure sensor uses three circuits. They are:<\/p>\n<ul>\n<li>A 5\u2013volt power supply from the Powertrain Control Module (PCM)<\/li>\n<li>A sensor ground through the PCM&#8217;s sensor return<\/li>\n<li>A signal to the PCM relating to engine oil pressure<\/li>\n<\/ul>\n<p>The oil pressure sensor has a 3\u2013wire electrical function very much like the Manifold Absolute Pressure (MAP) sensor. Meaning different pressures relate to different output voltages.<\/p>\n<p>A 5\u2013volt supply is sent to the sensor from the PCM to power up the sensor. The sensor returns a voltage signal back to the PCM relating to engine oil pressure. This signal is then transferred (bussed) to the instrument panel on either a CCD or PCI bus circuit (depending on vehicle line) to operate the oil pressure gauge and the check gauges lamp. Ground for the sensor is provided by the PCM through a low-noise sensor return.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Oil pressure gauge drops to zero then back to half normal pressure after engine warms up. Has good pressure when first cranked ? Is oil sending unit on exterior or interior of motor ? Most common cause for this would be a faulty oil pressure sending unit. It is a fairly in expensive part and&hellip;&nbsp;<a href=\"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/2017\/10\/oil-pressure-sensor-2002-dodge-ram-1500\" rel=\"bookmark\">Read More &raquo;<span class=\"screen-reader-text\">Oil pressure sensor 2002 Dodge Ram 1500 6 cyl<\/span><\/a><\/p>\n","protected":false},"author":14751,"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":[1,20],"tags":[10869,7541,20315],"class_list":["post-53472","post","type-post","status-publish","format-standard","hentry","category-auto-repair-questions","category-dodge","tag-oil-pressure-sending-unit","tag-oil-pressure-sensor","tag-rasm-1500"],"_links":{"self":[{"href":"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-json\/wp\/v2\/posts\/53472","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-json\/wp\/v2\/users\/14751"}],"replies":[{"embeddable":true,"href":"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-json\/wp\/v2\/comments?post=53472"}],"version-history":[{"count":0,"href":"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-json\/wp\/v2\/posts\/53472\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-json\/wp\/v2\/media?parent=53472"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-json\/wp\/v2\/categories?post=53472"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-json\/wp\/v2\/tags?post=53472"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}