{"id":16023,"date":"2022-03-16T09:37:03","date_gmt":"2022-03-16T13:37:03","guid":{"rendered":"https:\/\/gm-techlink.com\/?p=16023"},"modified":"2022-03-16T09:37:03","modified_gmt":"2022-03-16T13:37:03","slug":"possible-condensation-in-crankcase-pressure-sensor-assembly","status":"publish","type":"post","link":"https:\/\/gm-techlink.com\/?p=16023","title":{"rendered":"Possible Condensation in Crankcase Pressure Sensor Assembly"},"content":{"rendered":"<p>There may be possible moisture or condensation freezing in the crankcase pressure sensor assembly on some 2019 CT6; 2019-2022 XT4; 2020-2022 CT4, CT5, XT5, XT6, Blazer, Acadia; and 2021-2022 Envision models equipped with the 2.0L engine (RPO LSY). As a result, DTC P04FB (Crankcase Ventilation Hose Connection Pressure Sensor Performance) may be set.<\/p>\n<p>If DTC P04FB is setting in temperatures below freezing, follow the published diagnostics in the appropriate Service Information.<\/p>\n<p>If a root cause cannot be determined, check the PCV\/crankcase pressure sensor assembly. Remove the PCV\/crankcase pressure sensor and hose assembly and inspect it for any frozen moisture or condensation. (Fig. 11)<\/p>\n<p>&nbsp;<\/p>\n<p style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-16010\" src=\"https:\/\/gm-techlink.com\/wp-content\/uploads\/2022\/03\/F11-crankcase-1.jpg\" alt=\"\" width=\"740\" height=\"480\" srcset=\"https:\/\/gm-techlink.com\/wp-content\/uploads\/2022\/03\/F11-crankcase-1.jpg 740w, https:\/\/gm-techlink.com\/wp-content\/uploads\/2022\/03\/F11-crankcase-1-300x195.jpg 300w, https:\/\/gm-techlink.com\/wp-content\/uploads\/2022\/03\/F11-crankcase-1-85x55.jpg 85w, https:\/\/gm-techlink.com\/wp-content\/uploads\/2022\/03\/F11-crankcase-1-200x130.jpg 200w\" sizes=\"auto, (max-width: 740px) 100vw, 740px\" \/><strong>Fig. 11<\/strong><\/p>\n<p>&nbsp;<\/p>\n<p>If frozen moisture is present, allow the crankcase pressure sensor and hose assembly to thaw out and the moisture to drain. Next, using a combination of light compressed air and a shop towel, remove any residual condensation\/moisture. Once completed, clear any remaining DTCs using GDS and evaluate the condition.<\/p>\n<p>&nbsp;<\/p>\n<p><em>&#8211; Thanks to Robert Halas<\/em><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>There may be possible moisture or condensation freezing in the crankcase pressure sensor assembly on some 2019 CT6; 2019-2022 XT4; 2020-2022 CT4, CT5, XT5, XT6, Blazer, Acadia; and 2021-2022 Envision [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"footnotes":""},"categories":[108],"tags":[],"class_list":["post-16023","post","type-post","status-publish","format-standard","hentry","category-2022-march-b"],"_links":{"self":[{"href":"https:\/\/gm-techlink.com\/index.php?rest_route=\/wp\/v2\/posts\/16023","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gm-techlink.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/gm-techlink.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/gm-techlink.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/gm-techlink.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=16023"}],"version-history":[{"count":1,"href":"https:\/\/gm-techlink.com\/index.php?rest_route=\/wp\/v2\/posts\/16023\/revisions"}],"predecessor-version":[{"id":16024,"href":"https:\/\/gm-techlink.com\/index.php?rest_route=\/wp\/v2\/posts\/16023\/revisions\/16024"}],"wp:attachment":[{"href":"https:\/\/gm-techlink.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=16023"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gm-techlink.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=16023"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gm-techlink.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=16023"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}