I have Code P0641 on my 2007 Chevy 1500, Where should I start?<\/p>\n
RESPONSE<\/p>\n
Check your connections at the computer and the wiring harness<\/a>. If all checks out you will most likely need to replace the ECM itself.<\/p>\nP0641 CHEVROLET – 5 Volt Reference Voltage Incorrect<\/strong><\/p>\nThe control module has 2 internal 5-volt reference buses called 5-volt reference 1 and 5-volt reference 2 . Each reference bus provided 5-volt reference circuit for more than one sensor. Therefore, a fault condition on one 5-volt reference circuit will affect the other 5-volt reference circuits connected to the reference bus. The control module monitors the voltage on the 5-volt reference buses.<\/p>\nWhen is the code detected?<\/div>\nThe Engine Control Module (ECM)<\/a> has detected the sensor 5 volt reference circuit voltage is higher or lower than expected<\/div>\n<\/div>\nCode P0641 Possible causes<\/div>\n– Faulty Engine Control Module (ECM)\n– ECM harness is open or shorted\n– ECM circuit poor electrical connection\n– Shorted sensor on 5 volt circuit<\/p>\nECM – Engine Control Module Replacement 2007 Chevy 1500<\/h3>\n\n\t\t\n\t\t\t\n\t\t\t<\/iframe>\n\t\t<\/div>\n\n\t\t\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>I have Code P0641 on my 2007 Chevy 1500, Where should I start? RESPONSE Check your connections at the computer and the wiring harness. If all checks out you will most likely need to replace the ECM itself. P0641 CHEVROLET – 5 Volt Reference Voltage Incorrect The control module has 2 internal 5-volt reference buses… <a href=\"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/2016\/07\/code-p0641-2007-chevy-1500\" rel=\"bookmark\">Read More »<span class=\"screen-reader-text\">Code P0641 2007 Chevy 1500<\/span><\/a><\/p>\n","protected":false},"author":13732,"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":[467,10679],"class_list":["post-34959","post","type-post","status-publish","format-standard","hentry","category-auto-repair-questions","category-chevy","tag-467","tag-code-p0641"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v23.0 (Yoast SEO v27.1.1) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Code P0641 2007 Chevy 1500 - FreeAutoMechanic Advice<\/title>\n<meta name=\"description\" content=\"I have Code P0641 on my 2007 Chevy 1500, Where should I start? 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P0641 CHEVROLET – 5 Volt Reference Voltage Incorrect<\/strong><\/p>\nThe control module has 2 internal 5-volt reference buses called 5-volt reference 1 and 5-volt reference 2 . Each reference bus provided 5-volt reference circuit for more than one sensor. Therefore, a fault condition on one 5-volt reference circuit will affect the other 5-volt reference circuits connected to the reference bus. The control module monitors the voltage on the 5-volt reference buses.<\/p>\nWhen is the code detected?<\/div>\nThe Engine Control Module (ECM)<\/a> has detected the sensor 5 volt reference circuit voltage is higher or lower than expected<\/div>\n<\/div>\nCode P0641 Possible causes<\/div>\n– Faulty Engine Control Module (ECM)\n– ECM harness is open or shorted\n– ECM circuit poor electrical connection\n– Shorted sensor on 5 volt circuit<\/p>\nECM – Engine Control Module Replacement 2007 Chevy 1500<\/h3>\n\n\t\t\n\t\t\t\n\t\t\t<\/iframe>\n\t\t<\/div>\n\n\t\t\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>I have Code P0641 on my 2007 Chevy 1500, Where should I start? RESPONSE Check your connections at the computer and the wiring harness. If all checks out you will most likely need to replace the ECM itself. P0641 CHEVROLET – 5 Volt Reference Voltage Incorrect The control module has 2 internal 5-volt reference buses… <a href=\"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/2016\/07\/code-p0641-2007-chevy-1500\" rel=\"bookmark\">Read More »<span class=\"screen-reader-text\">Code P0641 2007 Chevy 1500<\/span><\/a><\/p>\n","protected":false},"author":13732,"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":[467,10679],"class_list":["post-34959","post","type-post","status-publish","format-standard","hentry","category-auto-repair-questions","category-chevy","tag-467","tag-code-p0641"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v23.0 (Yoast SEO v27.1.1) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Code P0641 2007 Chevy 1500 - FreeAutoMechanic Advice<\/title>\n<meta name=\"description\" content=\"I have Code P0641 on my 2007 Chevy 1500, Where should I start? 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The control module has 2 internal 5-volt reference buses called 5-volt reference 1 and 5-volt reference 2 . Each reference bus provided 5-volt reference circuit for more than one sensor. Therefore, a fault condition on one 5-volt reference circuit will affect the other 5-volt reference circuits connected to the reference bus. The control module monitors the voltage on the 5-volt reference buses.<\/p>\n
![\"2007](\"\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-content\/uploads\/2016\/07\/2007-chevy-1500.jpg\")
I have Code P0641 on my 2007 Chevy 1500, Where should I start?<\/p>\nI have Code P0641 on my 2007 Chevy 1500, Where should I start?<\/p>\n