{"id":288144,"date":"2024-10-25T12:43:09","date_gmt":"2024-10-25T12:43:09","guid":{"rendered":"https:\/\/www.ziptuning.com\/zh\/?p=288144"},"modified":"2024-10-25T12:43:09","modified_gmt":"2024-10-25T12:43:09","slug":"spn-2791-exhaust-gas-recirculation-egr-valve-position","status":"publish","type":"post","link":"https:\/\/www.ziptuning.com\/zh\/blog\/spn-2791-exhaust-gas-recirculation-egr-valve-position\/","title":{"rendered":"SPN 2791: \u6392\u6c14\u518d\u5faa\u73af (EGR) \u9600\u95e8\u4f4d\u7f6e"},"content":{"rendered":"<p>\u6545\u969c\u4ee3\u7801SPN 2791\u8868\u793a\u6392\u6c14\u518d\u5faa\u73af (EGR) \u7cfb\u7edf\u7684\u95ee\u9898\uff0c\u901a\u5e38\u51fa\u73b0\u5728\u56fd\u9645\u54c1\u724c\u548c Freightliner \u578b\u53f7\u7b49\u4e2d\u578b\u548c\u91cd\u578b\u5361\u8f66\u4e2d\u3002<\/p>\n<div class=\"workshop-experience-text\">\n<p>\u5728\u6211\u4eec\u7684\u8f66\u95f4\u4e2d\uff0c\u6211\u4eec\u7ecf\u5e38\u9047\u5230\u6545\u969c\u4ee3\u7801SPN 2791\uff0c\u6d89\u53ca\u5230\u4e0d\u540c\u54c1\u724c\u7684\u8f66\u8f86\u3002\u5c31\u5728\u4e0a\u5468\uff0c\u4e00\u8f862018\u5e74\u7684\u6c83\u5c14\u6c83XC90\u51fa\u73b0\u52a8\u529b\u4e0b\u964d\u548c\u8fd0\u884c\u4e0d\u7545\u7684\u95ee\u9898\u3002\u68c0\u67e5\u5de5\u5177\u663e\u793aSPN 2791 FMI 7\uff0c\u8868\u660eEGR\u9600\u5b58\u5728\u673a\u68b0\u6545\u969c\u3002\u6211\u4eec\u4e5f\u5728\u51e0\u8f86\u5927\u4f17Tiguan\u548c\u5965\u8feaQ5\u4e0a\u89c1\u8fc7\u7c7b\u4f3c\u95ee\u9898\u3002\u8fd9\u4e0d\u4ec5\u9650\u4e8e\u6b27\u6d32\u54c1\u724c\u2014\u2014\u6211\u4eec\u8fd8\u5728Ram 2500\u5361\u8f66\u751a\u81f3\u4e00\u4e9b\u65e5\u4ea7Frontier\u4e0a\u8bca\u65ad\u51fa\u4e86SPN 2791\u3002\u6839\u636e\u6211\u4eec\u7684\u7ecf\u9a8c\uff0c\u78b3\u79ef\u7d2f\u548cEGR\u9600\u5361\u6ede\u662f\u6700\u5e38\u89c1\u7684\u539f\u56e0\u3002\u6e05\u6d01\u9600\u95e8\u548c\u7ba1\u9053\u901a\u5e38\u53ef\u4ee5\u89e3\u51b3\u95ee\u9898\uff0c\u4f46\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u6211\u4eec\u4e0d\u5f97\u4e0d\u66f4\u6362\u6574\u4e2a\u9600\u95e8\u7ec4\u4ef6\u3002<\/p>\n<\/div>\n<h2 id=\"urgency-and-severity\">\u7d27\u6025\u7a0b\u5ea6\u548c\u4e25\u91cd\u6027<\/h2>\n<p>\u5f53SPN 2791\u6545\u969c\u4ee3\u7801\u51fa\u73b0\u65f6\uff0c\u8bf7\u8bc4\u4f30\u5176\u4e25\u91cd\u6027\uff1a<\/p>\n<ul>\n<li>\u5982\u679c\u4f34\u968f\u6709\u52a8\u529b\u4e0b\u964d\u6216\u8fd0\u884c\u4e0d\u7545\uff0c\u8bf7\u505c\u6b62\u9a7e\u9a76\uff0c\u5e76\u7531\u5408\u683c\u7684\u6280\u672f\u4eba\u5458\u68c0\u67e5\u8f66\u8f86\u3002<\/li>\n<li>\u5728\u8f83\u8f7b\u7684\u60c5\u51b5\u4e0b\uff0c\u53ef\u4ee5\u77ed\u6682\u9a7e\u9a76\uff0c\u4f46\u5e94\u5c3d\u5feb\u89e3\u51b3\u95ee\u9898\u4ee5\u9632\u6b62\u8fdb\u4e00\u6b65\u635f\u574f\u3002<\/li>\n<\/ul>\n<h2 id=\"code-details\">\u4ee3\u7801\u8be6\u60c5<\/h2>\n<ul>\n<li>SPN 2791\u662f\u9002\u7528\u4e8e\u591a\u79cd\u4e2d\u578b\u548c\u91cd\u578b\u5361\u8f66\u54c1\u724c\u548c\u578b\u53f7\u7684\u901a\u7528\u4ee3\u7801\u3002<\/li>\n<li>\u8be5\u4ee3\u7801\u53ef\u80fd\u5177\u6709\u4e0d\u540c\u7684\u6545\u969c\u6a21\u5f0f\u6307\u793a (FMI) \u4ee5\u6307\u5b9a\u6545\u969c\u7c7b\u578b\uff1a\n<ul>\n<li>FMI 7\uff1aEGR\u9600\u7684\u673a\u68b0\u6545\u969c<\/li>\n<li>FMI 13\uff1aEGR\u9600\u63a7\u5236\u5668\u6821\u51c6\u4e0d\u6b63\u786e<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h2 id=\"parts-involved-and-their-roles\">\u6d89\u53ca\u90e8\u4ef6\u53ca\u5176\u4f5c\u7528<\/h2>\n<p>\u4e0eSPN 2791\u76f8\u5173\u7684\u4e3b\u8981\u90e8\u4ef6\u662fEGR\u9600\uff0c\u5176\u63a7\u5236\u5e9f\u6c14\u56de\u6d41\u5230\u53d1\u52a8\u673a\u8fdb\u6c14\u53e3\uff0c\u4ee5\u51cf\u5c11\u6c2e\u6c27\u5316\u7269 (NOx) \u6392\u653e\u3002<\/p>\n<h2 id=\"common-causes\">\u5e38\u89c1\u539f\u56e0<\/h2>\n<ul>\n<li>EGR\u9600\u6545\u969c<\/li>\n<li>EGR\u901a\u9053\u6216\u8fde\u63a5\u7ba1\u9053\u5835\u585e<\/li>\n<li>EGR\u9600\u7535\u8def\u4e2d\u7684\u7ebf\u8def\u95ee\u9898<\/li>\n<li>\u6545\u969c\u7684\u0394-P\u4f20\u611f\u5668<\/li>\n<li>\u9519\u8bef\u7684\u53d1\u52a8\u673a\u8f6f\u4ef6\/\u6821\u51c6<\/li>\n<\/ul>\n<h2 id=\"diagnosing-steps\">\u8bca\u65ad\u6b65\u9aa4<\/h2>\n<ol>\n<li>\u626b\u63cf\u5176\u4ed6\u6545\u969c\u4ee3\u7801\uff0c\u5c24\u5176\u662f\u7535\u538b\u6545\u969c (SPN 168)\u3002<\/li>\n<li>\u68c0\u67e5SPN 2791 FMI 7\u7684\u6269\u5c55\u6570\u636e\u4e2d\u7684\u201c\u4fdd\u7559\u7684\u6781\u7aef\u53c2\u6570\u201d\u503c\u3002<\/li>\n<li>\u68c0\u67e5EGR\u9600\u6267\u884c\u5668\u7684\u62c9\u6746\u548c\u7403\u5ea7\u7684\u81ea\u7531\u8fd0\u52a8\u60c5\u51b5\uff0c\u5982\u6709\u6545\u969c\u5219\u66f4\u6362\u3002<\/li>\n<li>\u6d4b\u91cfEGR\u9600\u6267\u884c\u5668\u7535\u673a\u7ebf\u5708\u7684\u7535\u963b\uff0c\u5e94\u4e3a55-65\u6b27\u59c6\u3002<\/li>\n<li>\u68c0\u67e5EGR\u9600\u548c\u53d1\u52a8\u673a\u63a7\u5236\u6a21\u5757 (ECM) \u4e4b\u95f4\u7684\u7ebf\u8def\u548c\u8fde\u63a5\u5668\u3002<\/li>\n<\/ol>\n<h2 id=\"solutions\">\u89e3\u51b3\u65b9\u6848<\/h2>\n<ul>\n<li>\u6e05\u6d01\u6216\u66f4\u6362EGR\u9600\u548c\u901a\u9053\u3002<\/li>\n<li>\u66f4\u6362\u6545\u969c\u7684\u4f20\u611f\u5668\uff0c\u4f8b\u5982\u0394-P\u4f20\u611f\u5668\u3002<\/li>\n<li>\u5982\u6821\u51c6\u4e0d\u6b63\u786e\uff0c\u5219\u66f4\u65b0\u53d1\u52a8\u673a\u8f6f\u4ef6\/\u6821\u51c6\u3002<\/li>\n<li>\u6839\u636e\u9700\u8981\u4fee\u590d\u7ebf\u8def\u548c\u8fde\u63a5\u5668\u3002<\/li>\n<\/ul>\n<h2 id=\"prevention\">\u9884\u9632<\/h2>\n<ul>\n<li>\u5b9a\u671f\u7ef4\u62a4EGR\u7cfb\u7edf\u3002<\/li>\n<li>\u4f7f\u7528\u9ad8\u8d28\u91cf\u7684\u71c3\u6cb9\u548c\u673a\u6cb9\u3002<\/li>\n<li>\u907f\u514d\u5f71\u54cdEGR\u64cd\u4f5c\u7684\u53d1\u52a8\u673a\u6539\u88c5\u3002<\/li>\n<\/ul>\n<h2 id=\"repair-costs\">\u7ef4\u4fee\u6210\u672c<\/h2>\n<ul>\n<li>EGR\u9600\u66f4\u6362\uff1a$500-$1,000 (\u20ac425-\u20ac850)<\/li>\n<li>EGR\u7cfb\u7edf\u6e05\u6d01\uff1a$100-$300 (\u20ac85-\u20ac255) <\/li>\n<li>\u4eba\u5de5\u6210\u672c\uff1a\u6bcf\u5c0f\u65f6$100-$150 (\u20ac85-\u20ac130)<\/li>\n<\/ul>\n<h2 id=\"related-fault-codes\">\u76f8\u5173\u6545\u969c\u4ee3\u7801<\/h2>\n<p>SPN 2791\u53ef\u80fd\u4e0e\u4ee5\u4e0b\u4ee3\u7801\u4e00\u8d77\u51fa\u73b0\uff1a<\/p>\n<ul>\n<li>SPN 2659: EGR\u9600\u4f4d\u7f6e\u4f20\u611f\u5668\u7535\u8def<\/li>\n<li>SPN 168 FMI (\u4efb\u4f55)\uff1a\u7535\u538b\u6545\u969c<\/li>\n<\/ul>\n<p>\u76f8\u5173\u89c4\u683c\uff1a<\/p>\n<ul>\n<li>EGR\u9600\u76f4\u5f84\uff1a50 mm (2 \u82f1\u5bf8)<\/li>\n<li>EGR\u901a\u9053\u76f4\u5f84\uff1a25 mm (1 \u82f1\u5bf8)<\/li>\n<\/ul>\n<h2 id=\"frequently-asked-questions-about-spn-2791-fault-code\">\u5173\u4e8eSPN 2791\u6545\u969c\u4ee3\u7801\u7684\u5e38\u89c1\u95ee\u9898<\/h2>\n<h3 id=\"what-does-the-spn-2791-fault-code-mean-\">SPN 2791\u6545\u969c\u4ee3\u7801\u662f\u4ec0\u4e48\u610f\u601d\uff1f<\/h3>\n<p>SPN 2791\u8868\u793a\u6392\u6c14\u518d\u5faa\u73af (EGR) \u7cfb\u7edf\u7684\u95ee\u9898\uff0c\u901a\u5e38\u662fEGR\u9600\u6216\u5176\u63a7\u5236\u7535\u8def\u7684\u6545\u969c\u3002\u5177\u4f53\u95ee\u9898\u7531\u4ee3\u7801\u968f\u9644\u7684\u6545\u969c\u6a21\u5f0f\u6307\u793a (FMI) \u786e\u5b9a\u3002<\/p>\n<h3 id=\"what-are-the-common-fmis-associated-with-spn-2791-\">SPN 2791\u7684\u5e38\u89c1FMI\u662f\u4ec0\u4e48\uff1f<\/h3>\n<ul>\n<li>FMI 7\uff1aEGR\u9600\u7684\u673a\u68b0\u6545\u969c\uff0c\u4f8b\u5982\u9600\u95e8\u5361\u5728\u5f00\u542f\u6216\u5173\u95ed\u72b6\u6001\u3002<\/li>\n<li>FMI 13\uff1aEGR\u9600\u63a7\u5236\u5668\u6821\u51c6\u9519\u8bef\u3002\u9600\u95e8\u5728\u521d\u6b21\u70b9\u706b\u65f6\u7684\u81ea\u52a8\u6821\u51c6\u8fc7\u7a0b\u5931\u8d25\u3002<\/li>\n<\/ul>\n<h3 id=\"what-vehicles-are-affected-by-spn-2791-\">\u54ea\u4e9b\u8f66\u8f86\u53d7SPN 2791\u5f71\u54cd\uff1f<\/h3>\n<p>\u6b64\u901a\u7528\u4ee3\u7801\u4e3b\u8981\u5f71\u54cd\u4e2d\u578b\u548c\u91cd\u578b\u5361\u8f66\uff0c\u5982International\u3001Freightliner\u548c\u914d\u5907\u5eb7\u660e\u65af\u53d1\u52a8\u673a\u7684\u8f66\u578b\u3002<\/p>\n<h3 id=\"what-are-the-symptoms-of-an-active-spn-2791-fault-\">SPN 2791\u6545\u969c\u7684\u75c7\u72b6\u662f\u4ec0\u4e48\uff1f<\/h3>\n<p>\u75c7\u72b6\u53ef\u80fd\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>\u70b9\u4eae\u7684\u7425\u73c0\u8272\u201c\u68c0\u67e5\u53d1\u52a8\u673a\u201d\u706f<\/li>\n<li>\u53d1\u52a8\u673a\u52a8\u529b\u4e0b\u964d<\/li>\n<li>\u8fd0\u884c\u4e0d\u7545\u6216\u70b9\u706b\u4e0d\u826f<\/li>\n<li>EGR\u9600\u6fc0\u6d3b\u529f\u80fd\u88ab\u7981\u7528<\/li>\n<\/ul>\n<h3 id=\"can-i-continue-driving-with-spn-2791-\">\u6211\u53ef\u4ee5\u7ee7\u7eed\u9a7e\u9a76\u51fa\u73b0SPN 2791\u7684\u8f66\u8f86\u5417\uff1f<\/h3>\n<p>\u8fd9\u53d6\u51b3\u4e8e\u4e25\u91cd\u6027\u3002\u5982\u679c\u4ee3\u7801\u4f34\u968f\u53ef\u89c1\u7684\u9a7e\u9a76\u95ee\u9898\uff0c\u8bf7\u505c\u6b62\u9a7e\u9a76\u5e76\u8fdb\u884c\u68c0\u67e5\u3002\u5426\u5219\uff0c\u53ef\u4ee5\u77ed\u6682\u9a7e\u9a76\uff0c\u4f46\u5e94\u53ca\u65f6\u89e3\u51b3\u95ee\u9898\u4ee5\u9632\u6b62\u635f\u574f\u3002<\/p>\n<h3 id=\"what-causes-spn-2791-fmi-7-\">\u5bfc\u81f4SPN 2791 FMI 7\u7684\u539f\u56e0\u662f\u4ec0\u4e48\uff1f<\/h3>\n<p>EGR\u9600\u7684\u673a\u68b0\u6545\u969c\uff0c\u4f8b\u5982\uff1a<\/p>\n<ul>\n<li>\u7531\u4e8e\u78b3\u79ef\u7d2f\u800c\u5bfc\u81f4\u9600\u95e8\u5361\u6ede<\/li>\n<li>\u6545\u969c\u7684\u9600\u95e8\u6267\u884c\u5668\u7535\u673a\u6216\u7ebf\u8def<\/li>\n<li>\u65ad\u88c2\u7684\u9600\u95e8\u5f39\u7c27\u6216\u635f\u574f\u7684\u9600\u5ea7<\/li>\n<\/ul>\n<h3 id=\"what-causes-spn-2791-fmi-13-\">\u5bfc\u81f4SPN 2791 FMI 13\u7684\u539f\u56e0\u662f\u4ec0\u4e48\uff1f<\/h3>\n<p>\u5728\u94a5\u5319\u6253\u5f00\u7684\u81ea\u52a8\u6821\u51c6\u8fc7\u7a0b\u4e2d\uff0cEGR\u9600\u88ab\u68c0\u6d4b\u4e3a\u8d85\u8fc720%\u5f00\u542f\uff0c\u901a\u5e38\u662f\u56e0\u4e3a\uff1a<\/p>\n<ul>\n<li>\u78b3\u6c89\u79ef\u5bfc\u81f4\u9600\u95e8\u65e0\u6cd5\u5b8c\u5168\u5173\u95ed<\/li>\n<li>\u6545\u969c\u7684\u9600\u95e8\u4f4d\u7f6e\u4f20\u611f\u5668\u6216\u7ebf\u8def<\/li>\n<li>\u9519\u8bef\u7684ECM\u6821\u51c6<\/li>\n<\/ul>\n<h3 id=\"how-do-you-diagnose-spn-2791-\">\u5982\u4f55\u8bca\u65adSPN 2791\uff1f<\/h3>\n<ol>\n<li>\u626b\u63cf\u5176\u4ed6\u4ee3\u7801\uff0c\u5c24\u5176\u662fSPN 168\u7535\u538b\u6545\u969c\u3002<\/li>\n<li>\u68c0\u67e5SPN 2791 FMI 7\u7684\u6269\u5c55\u6570\u636e\u4e2d\u7684\u201c\u4fdd\u7559\u7684\u6781\u7aef\u53c2\u6570\u201d\u503c\u3002<\/li>\n<li>\u68c0\u67e5EGR\u9600\u6267\u884c\u5668\u62c9\u6746\u548c\u7403\u5ea7\u7684\u81ea\u7531\u8fd0\u52a8\u60c5\u51b5\u3002<\/li>\n<li>\u6d4b\u91cfEGR\u9600\u6267\u884c\u5668\u7535\u673a\u7ebf\u5708\u7684\u7535\u963b\uff08\u5e94\u4e3a55-65\u6b27\u59c6\uff09\u3002<\/li>\n<li>\u68c0\u67e5EGR\u9600\u4e0eECM\u4e4b\u95f4\u7684\u7ebf\u8def\u548c\u8fde\u63a5\u5668\u3002<\/li>\n<\/ol>\n<h3 id=\"can-spn-2791-be-caused-by-issues-other-than-the-egr-valve-\">SPN 2791\u53ef\u80fd\u7531EGR\u9600\u4ee5\u5916\u7684\u95ee\u9898\u5f15\u8d77\u5417\uff1f<\/h3>\n<p>\u662f\u7684\uff0c\u53ef\u80fd\u7531\u4e8e\u4ee5\u4e0b\u539f\u56e0\u5bfc\u81f4\uff1a<\/p>\n<ul>\n<li>EGR\u901a\u9053\u6216\u8fde\u63a5\u7ba1\u9053\u5835\u585e<\/li>\n<li>\u6545\u969c\u7684\u0394-P\u4f20\u611f\u5668<\/li>\n<li>\u9519\u8bef\u7684\u53d1\u52a8\u673a\u8f6f\u4ef6\/\u6821\u51c6<\/li>\n<li>\u5176\u4ed6\u4f20\u611f\u5668\u95ee\u9898\u5bfc\u81f4\u8fc7\u5ea6EGR\u9700\u6c42<\/li>\n<\/ul>\n<h3 id=\"how-do-you-fix-spn-2791-fmi-7-\">\u5982\u4f55\u4fee\u590dSPN 2791 FMI 7\uff1f<\/h3>\n<ul>\n<li>\u5f7b\u5e95\u6e05\u6d01EGR\u9600\u548c\u901a\u9053\u4ee5\u6e05\u9664\u78b3\u79ef\u7d2f\u3002<\/li>\n<li>\u5982\u679c\u6e05\u6d01\u672a\u80fd\u6062\u590d\u6b63\u5e38\u64cd\u4f5c\uff0c\u5219\u66f4\u6362EGR\u9600\u548c\/\u6216\u6267\u884c\u5668\u7535\u673a\u3002<\/li>\n<li>\u4fee\u590d\u635f\u574f\u7684\u7ebf\u8def\u6216\u8fde\u63a5\u5668\u3002<\/li>\n<\/ul>\n<h3 id=\"how-do-you-fix-spn-2791-fmi-13-\">\u5982\u4f55\u4fee\u590dSPN 2791 FMI 13\uff1f<\/h3>\n<ul>\n<li>\u53d6\u4e0bEGR\u9600\uff0c\u4f7f\u7528\u5316\u6cb9\u5668\u6e05\u6d01\u5242\u5f7b\u5e95\u6e05\u6d01\u3002\u5982\u6709\u9700\u8981\uff0c\u6da6\u6ed1\u4ee5\u91ca\u653e\u9600\u95e8\u8fd0\u52a8\u3002<\/li>\n<li>\u5982\u679c\u6e05\u6d01\u4e0d\u80fd\u89e3\u51b3\u95ee\u9898\uff0c\u5219\u66f4\u6362\u9600\u95e8\u3002<\/li>\n<li>\u7528\u6b63\u786e\u7684\u8f6f\u4ef6\/\u6821\u51c6\u66f4\u65b0ECM\u3002<\/li>\n<li>\u66f4\u6362\u6545\u969c\u7684\u0394-P\u4f20\u611f\u5668\u3002<\/li>\n<\/ul>\n<h3 id=\"can-i-just-clean-the-egr-valve-to-fix-spn-2791-\">\u6211\u53ef\u4ee5\u4ec5\u901a\u8fc7\u6e05\u6d01EGR\u9600\u6765\u4fee\u590dSPN 2791\u5417\uff1f<\/h3>\n<p>\u6e05\u6d01\u9600\u95e8\u548c\u901a\u9053\u662f\u7b2c\u4e00\u6b65\uff0c\u901a\u5e38\u53ef\u4ee5\u89e3\u51b3\u95ee\u9898\u3002\u4f46\u662f\uff0c\u5982\u679c\u9600\u95e8\u6709\u7269\u7406\u635f\u574f\u6216\u6267\u884c\u5668\u5931\u6548\uff0c\u5219\u9700\u8981\u66f4\u6362\u3002<\/p>\n<h3 id=\"how-much-does-it-cost-to-fix-spn-2791-\">\u4fee\u590dSPN 2791\u7684\u8d39\u7528\u662f\u591a\u5c11\uff1f<\/h3>\n<ul>\n<li>EGR\u9600\u66f4\u6362\uff1a$500-$1,000<\/li>\n<li>EGR\u7cfb\u7edf\u6e05\u6d01\uff1a$100-$300<\/li>\n<li>\u4eba\u5de5\u6210\u672c\uff1a\u6bcf\u5c0f\u65f6$100-$150<\/li>\n<\/ul>\n<h3 id=\"how-can-i-prevent-spn-2791-\">\u5982\u4f55\u9884\u9632SPN 2791\uff1f<\/h3>\n<ul>\n<li>\u5b9a\u671f\u7ef4\u62a4EGR\u7cfb\u7edf\u3002<\/li>\n<li>\u4f7f\u7528\u9ad8\u8d28\u91cf\u7684\u71c3\u6cb9\u548c\u673a\u6cb9\uff0c\u4ee5\u51cf\u5c11\u78b3\u79ef\u7d2f\u3002<\/li>\n<li>\u907f\u514d\u5f71\u54cdEGR\u64cd\u4f5c\u7684\u53d1\u52a8\u673a\u6539\u88c5\u3002<\/li>\n<li>\u53ca\u65f6\u5904\u7406\u5176\u4ed6\u53d1\u52a8\u673a\u95ee\u9898\u3002<\/li>\n<\/ul>\n<h3 id=\"what-other-components-should-i-check-with-spn-2791-\">SPN 2791\u65f6\u8fd8\u5e94\u68c0\u67e5\u54ea\u4e9b\u5176\u4ed6\u90e8\u4ef6\uff1f<\/h3>\n<p>\u68c0\u67e5\u0394-P\u4f20\u611f\u5668\u3001\u8fde\u63a5\u7ba1\u9053\u3001\u8f6f\u7ba1\u548c\u7ebf\u8def\u662f\u5426\u6709\u635f\u574f\u6216\u5835\u585e\u3002\u67e5\u627e\u8fdb\u6c14\u548c\u6392\u6c14\u4e2d\u7684\u8fc7\u91cf\u70df\u7070\u3001\u71c3\u6cb9\u3001\u51b7\u5374\u6db2\u6216\u673a\u6cb9\uff0c\u9632\u6b62\u6c61\u67d3EGR\u7cfb\u7edf\u3002<\/p>\n<h3 id=\"can-spn-2791-cause-damage-if-left-unrepaired-\">\u5982\u679c\u4e0d\u4fee\u590d\uff0cSPN 2791\u662f\u5426\u4f1a\u5bfc\u81f4\u635f\u574f\uff1f<\/h3>\n<p>\u662f\u7684\uff0cEGR\u9600\u5361\u6ede\u53ef\u80fd\u5bfc\u81f4\uff1a<\/p>\n<ul>\n<li>\u8fd0\u884c\u4e0d\u7545\u548c\u70b9\u706b\u4e0d\u826f<\/li>\n<li>\u8fc7\u91cf\u70df\u7070\u548c\u70df\u96fe<\/li>\n<li>\u8fdb\u6c14\u6b67\u7ba1\u548c\u4f20\u611f\u5668\u5835\u585e<\/li>\n<li>\u6da1\u8f6e\u589e\u538b\u5668\u6545\u969c<\/li>\n<li>\u5982\u679c\u78b3\u6c22\u5316\u5408\u7269\u8fdb\u5165\u6c14\u7f38\uff0c\u53ef\u80fd\u5bfc\u81f4\u4e25\u91cd\u7684\u53d1\u52a8\u673a\u635f\u574f<\/li>\n<\/ul>\n<h3 id=\"is-spn-2791-related-to-any-other-fault-codes-\">SPN 2791\u4e0e\u5176\u4ed6\u6545\u969c\u4ee3\u7801\u6709\u5173\u5417\uff1f<\/h3>\n<p>\u5b83\u53ef\u80fd\u4e0e\u4ee5\u4e0b\u4ee3\u7801\u4e00\u8d77\u51fa\u73b0\uff1a<\/p>\n<ul>\n<li>SPN 2659: EGR\u9600\u4f4d\u7f6e\u4f20\u611f\u5668<\/li>\n<li>SPN 168 FMI (\u4efb\u4f55)\uff1a\u7535\u538b\u6545\u969c<\/li>\n<li>SPN 4334: \u0394-P\u4f20\u611f\u5668<\/li>\n<\/ul>\n<h3 id=\"what-are-the-dimensions-of-a-typical-egr-valve-\">\u5178\u578bEGR\u9600\u7684\u5c3a\u5bf8\u662f\u591a\u5c11\uff1f<\/h3>\n<ul>\n<li>\u9600\u95e8\u76f4\u5f84\uff1a50 mm (2 \u82f1\u5bf8)<\/li>\n<li>\u901a\u9053\u76f4\u5f84\uff1a25 mm (1 \u82f1\u5bf8)<\/li>\n<\/ul>\n<h3 id=\"how-does-the-egr-valve-work-\">EGR\u9600\u5982\u4f55\u5de5\u4f5c\uff1f<\/h3>\n<p>\u9600\u95e8\u7531\u7535\u52a8\u6267\u884c\u5668\u63a7\u5236\u5f00\u542f\uff0c\u4ee5\u5141\u8bb8\u9002\u91cf\u7684\u5e9f\u6c14\u8fdb\u5165\u8fdb\u6c14\u9053\u3002\u8fd9\u6837\u53ef\u4ee5\u964d\u4f4e\u71c3\u70e7\u6e29\u5ea6\uff0c\u4ece\u800c\u51cf\u5c11NOx\u6392\u653e\u3002\u5f53\u4e0d\u6fc0\u6d3b\u65f6\uff0c\u9600\u95e8\u901a\u8fc7\u5f39\u7c27\u529b\u5173\u95ed\u3002<\/p>\n<h3 id=\"what-special-tools-are-needed-to-diagnose-spn-2791-\">\u8bca\u65adSPN 2791\u9700\u8981\u54ea\u4e9b\u7279\u6b8a\u5de5\u5177\uff1f<\/h3>\n<p>\u63a8\u8350\u4f7f\u7528\u4e13\u4e1a\u626b\u63cf\u5de5\u5177\u6216\u7ecf\u9500\u5546\u7ea7\u522b\u7684\u8bca\u65ad\u8f6f\u4ef6\u6765\u8bfb\u53d6\u6269\u5c55\u6545\u969c\u6570\u636e\u3001\u67e5\u770b\u5b9e\u65f6\u4f20\u611f\u5668\u503c\u5e76\u547d\u4ee4EGR\u9600\u8fdb\u884c\u6d4b\u8bd5\u3002\u7535\u963b\u6d4b\u91cf\u65f6\u9700\u8981\u6570\u5b57\u4e07\u7528\u8868\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6545\u969c\u4ee3\u7801SPN 2791\u8868\u793a\u6392\u6c14\u518d\u5faa\u73af (EGR) \u7cfb\u7edf\u7684\u95ee\u9898\uff0c\u901a\u5e38\u51fa\u73b0\u5728\u56fd\u9645\u54c1\u724c\u548c Freightliner<\/p>\n","protected":false},"author":13,"featured_media":288145,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-288144","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.ziptuning.com\/zh\/wp-json\/wp\/v2\/posts\/288144","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ziptuning.com\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ziptuning.com\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ziptuning.com\/zh\/wp-json\/wp\/v2\/users\/13"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ziptuning.com\/zh\/wp-json\/wp\/v2\/comments?post=288144"}],"version-history":[{"count":2,"href":"https:\/\/www.ziptuning.com\/zh\/wp-json\/wp\/v2\/posts\/288144\/revisions"}],"predecessor-version":[{"id":288150,"href":"https:\/\/www.ziptuning.com\/zh\/wp-json\/wp\/v2\/posts\/288144\/revisions\/288150"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.ziptuning.com\/zh\/wp-json\/wp\/v2\/media\/288145"}],"wp:attachment":[{"href":"https:\/\/www.ziptuning.com\/zh\/wp-json\/wp\/v2\/media?parent=288144"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ziptuning.com\/zh\/wp-json\/wp\/v2\/categories?post=288144"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ziptuning.com\/zh\/wp-json\/wp\/v2\/tags?post=288144"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}