{"id":288028,"date":"2024-10-25T05:54:13","date_gmt":"2024-10-25T05:54:13","guid":{"rendered":"https:\/\/www.ziptuning.com\/zh\/?p=288028"},"modified":"2024-10-28T10:16:35","modified_gmt":"2024-10-28T10:16:35","slug":"spn-4339-aftertreatment-1-scr-operator-inducement-active","status":"publish","type":"post","link":"https:\/\/www.ziptuning.com\/zh\/blog\/spn-4339-aftertreatment-1-scr-operator-inducement-active\/","title":{"rendered":"SPN 4339 &#8211; \u540e\u5904\u74061 SCR\u64cd\u4f5c\u5458\u8bf1\u5bfc\u6d3b\u52a8"},"content":{"rendered":"<h2 id=\"fault-code-spn-4339-a-comprehensive-guide-for-engineers-and-mechanics\">\u6545\u969c\u4ee3\u7801SPN 4339\uff1a\u5de5\u7a0b\u5e08\u548c\u673a\u68b0\u5e08\u7684\u7efc\u5408\u6307\u5357<\/h2>\n<p>SPN 4339\u662f\u4e0e\u73b0\u4ee3\u67f4\u6cb9\u53d1\u52a8\u673a\u4e2d\u7684\u9009\u62e9\u6027\u50ac\u5316\u8fd8\u539f\uff08SCR\uff09\u7cfb\u7edf\u76f8\u5173\u7684\u6545\u969c\u4ee3\u7801\u3002\u672c\u6587\u63d0\u4f9b\u4e86\u5bf9\u8be5\u4ee3\u7801\u7684\u8be6\u7ec6\u5206\u6790\u3001\u5176\u5f71\u54cd\u4ee5\u53ca\u5982\u4f55\u6709\u6548\u89e3\u51b3\u8be5\u95ee\u9898\u3002<\/p>\n<div class=\"workshop-experience-text\">\n<p>\u5728\u6211\u4eec\u7684\u8f66\u95f4\u4e2d\uff0c\u6211\u4eec\u6ce8\u610f\u5230\u6545\u969c\u4ee3\u7801SPN 4339\u662f\u4e00\u4e2a\u53cd\u590d\u51fa\u73b0\u7684\u95ee\u9898\uff0c\u7279\u522b\u662f\u5728\u6b27\u6d32\u91cd\u578b\u5361\u8f66\u548c\u5546\u7528\u8f66\u8f86\u4e2d\u3002\u6211\u4eec\u7ecf\u5e38\u5728\u6c83\u5c14\u6c83\u3001\u65af\u582a\u5c3c\u4e9a\u548cMAN\u5361\u8f66\u4ee5\u53ca\u4e00\u4e9b\u6885\u8d5b\u5fb7\u65af-\u5954\u9a70\u8f66\u578b\u4e2d\u770b\u5230\u5b83\u3002\u8be5\u4ee3\u7801\u901a\u5e38\u4e0eSCR\u7cfb\u7edf\u7684\u95ee\u9898\u6709\u5173\uff0c\u901a\u5e38\u6d89\u53caDEF\uff08\u67f4\u6cb9\u6392\u6c14\u6db2\uff09\u538b\u529b\u6216\u8d28\u91cf\u95ee\u9898\u3002\u867d\u7136\u6211\u4eec\u5728\u4e00\u4e9b\u7f8e\u7cfb\u8f66\u578b\u5982Freightliner\u548cKenworth\u4e2d\u4e5f\u9047\u5230\u8fc7\uff0c\u4f46\u5728\u4e9a\u6d32\u54c1\u724c\u4e2d\u5219\u8f83\u5c11\u89c1\u3002\u4ece\u6211\u4eec\u7684\u7ecf\u9a8c\u6765\u770b\uff0cSPN 4339\u57282010\u5e74\u81f32020\u5e74\u95f4\u751f\u4ea7\u7684\u8f66\u8f86\u4e2d\u6700\u4e3a\u5e38\u89c1\uff0c\u8fd9\u4e0eSCR\u6280\u672f\u7684\u5e7f\u6cdb\u5e94\u7528\u4ee5\u6ee1\u8db3\u66f4\u4e25\u683c\u7684\u6392\u653e\u6807\u51c6\u76f8\u4e00\u81f4\u3002<\/p>\n<\/div>\n<h2 id=\"urgency-and-immediate-action\">\u7d27\u6025\u6027\u4e0e\u7acb\u5373\u884c\u52a8<\/h2>\n<p>SPN 4339\u901a\u5e38\u662f\u4e00\u4e2a\u4fe1\u606f\u6027\u6545\u969c\u4ee3\u7801\uff0c\u8868\u660e\u5df2\u5b9e\u65bd\u53d1\u52a8\u673a\u529f\u7387\u9650\u5236\u3002\u867d\u7136\u53ef\u80fd\u4e0d\u9700\u8981\u7acb\u5373\u505c\u8f66\uff0c\u4f46\u5efa\u8bae\u5c3d\u5feb\u89e3\u51b3\u6b64\u95ee\u9898\uff0c\u4ee5\u9632\u6b62\u5bf9SCR\u7cfb\u7edf\u7684\u8fdb\u4e00\u6b65\u635f\u574f\u6216\u6f5c\u5728\u7684\u590d\u6742\u95ee\u9898\u3002<\/p>\n<h2 id=\"detailed-code-information\">\u8be6\u7ec6\u4ee3\u7801\u4fe1\u606f<\/h2>\n<p>SPN 4339\u4e0eSCR\u7cfb\u7edf\u76d1\u6d4b\u76f8\u5173\uff0c\u901a\u5e38\u8868\u660eDEF\u538b\u529b\u6216\u7cfb\u7edf\u56de\u9000\u5230\u5148\u524d\u72b6\u6001\u7684\u95ee\u9898\u3002\u8be5\u4ee3\u7801\u901a\u5e38\u9002\u7528\u4e8e\u5404\u79cd\u914d\u5907SCR\u6280\u672f\u7684\u67f4\u6cb9\u53d1\u52a8\u673a\uff0c\u5c24\u5176\u662f\u4e2d\u578b\u548c\u91cd\u578b\u5361\u8f66\u3002<\/p>\n<h2 id=\"components-involved\">\u6d89\u53ca\u7684\u7ec4\u4ef6<\/h2>\n<p>\u4e0eSPN 4339\u76f8\u5173\u7684\u4e3b\u8981\u7ec4\u4ef6\u5305\u62ec\uff1a<\/p>\n<ol>\n<li>SCR\u7cfb\u7edf<\/li>\n<li>DEF\u8ba1\u91cf\u5355\u5143<\/li>\n<li>DEF\u538b\u529b\u4f20\u611f\u5668<\/li>\n<li>DEF\u7ba1\u7ebf\u548c\u55b7\u5c04\u5668<\/li>\n<\/ol>\n<p>SCR\u7cfb\u7edf\u901a\u8fc7\u5411\u6392\u6c14\u6d41\u6ce8\u5165DEF\u6765\u51cf\u5c11\u6c2e\u6c27\u5316\u7269\uff08NOx\uff09\u6392\u653e\u3002DEF\u8ba1\u91cf\u5355\u5143\u63a7\u5236DEF\u7684\u6ce8\u5165\uff0c\u800c\u538b\u529b\u4f20\u611f\u5668\u76d1\u6d4b\u7cfb\u7edf\u7684\u538b\u529b\u4ee5\u786e\u4fdd\u6b63\u5e38\u8fd0\u884c\u3002<\/p>\n<h2 id=\"common-causes\">\u5e38\u89c1\u539f\u56e0<\/h2>\n<p>SPN 4339\u7684\u5e38\u89c1\u539f\u56e0\u5305\u62ec\uff1a<\/p>\n<ol>\n<li>DEF\u538b\u529b\u8fc7\u4f4e<\/li>\n<li>\u6545\u969c\u7684DEF\u8ba1\u91cf\u5355\u5143<\/li>\n<li>\u5835\u585e\u7684DEF\u55b7\u5c04\u5668<\/li>\n<li>\u635f\u574f\u7684DEF\u7ba1\u7ebf<\/li>\n<li>\u6545\u969c\u7684DEF\u538b\u529b\u4f20\u611f\u5668<\/li>\n<\/ol>\n<h2 id=\"diagnostic-procedure\">\u8bca\u65ad\u7a0b\u5e8f<\/h2>\n<p>\u8981\u8bca\u65adSPN 4339\uff0c\u8bf7\u6267\u884c\u4ee5\u4e0b\u6b65\u9aa4\uff1a<\/p>\n<ol>\n<li>\u5c06\u8bca\u65ad\u5de5\u5177\u8fde\u63a5\u5230\u53d1\u52a8\u673a\u7684ECM<\/li>\n<li>\u68c0\u7d22\u5e76\u5206\u6790\u6240\u6709\u6d3b\u52a8\u548c\u5b58\u50a8\u7684\u6545\u969c\u4ee3\u7801<\/li>\n<li>\u68c0\u67e5DEF\u7684\u6c34\u5e73\u548c\u8d28\u91cf<\/li>\n<li>\u68c0\u67e5DEF\u7ba1\u7ebf\u662f\u5426\u6709\u6cc4\u6f0f\u6216\u5835\u585e<\/li>\n<li>\u6d4b\u8bd5DEF\u538b\u529b\u4f20\u611f\u5668\u7684\u529f\u80fd<\/li>\n<li>\u68c0\u67e5DEF\u8ba1\u91cf\u5355\u5143\u7684\u6b63\u5e38\u8fd0\u884c<\/li>\n<li>\u9a8c\u8bc1DEF\u55b7\u5c04\u5668\u7684\u6027\u80fd<\/li>\n<\/ol>\n<p>\u51c6\u786e\u8bca\u65ad\u53ef\u80fd\u9700\u8981\u4e13\u7528\u7684\u8bca\u65ad\u8bbe\u5907\uff0c\u4f8b\u5982DEF\u7cfb\u7edf\u7684\u538b\u529b\u6d4b\u8bd5\u4eea\u3002<\/p>\n<h2 id=\"solutions-and-repairs\">\u89e3\u51b3\u65b9\u6848\u4e0e\u4fee\u590d<\/h2>\n<p>\u9488\u5bf9SPN 4339\u7684\u6f5c\u5728\u4fee\u590d\u65b9\u6cd5\u5305\u62ec\uff1a<\/p>\n<ol>\n<li>\u8865\u5145DEF\u5982\u679c\u5176\u6c34\u5e73\u8f83\u4f4e<\/li>\n<li>\u66f4\u6362\u6545\u969c\u7684DEF\u538b\u529b\u4f20\u611f\u5668<\/li>\n<li>\u6e05\u6d01\u6216\u66f4\u6362\u5835\u585e\u7684DEF\u55b7\u5c04\u5668<\/li>\n<li>\u4fee\u590d\u6216\u66f4\u6362\u635f\u574f\u7684DEF\u7ba1\u7ebf<\/li>\n<li>\u66f4\u6362\u6545\u969c\u7684DEF\u8ba1\u91cf\u5355\u5143<\/li>\n<\/ol>\n<h2 id=\"prevention-strategies\">\u9884\u9632\u7b56\u7565<\/h2>\n<p>\u4e3a\u9632\u6b62SPN 4339\u7684\u51fa\u73b0\uff1a<\/p>\n<ol>\n<li>\u5b9a\u671f\u68c0\u67e5\u548c\u4fdd\u6301\u9002\u5f53\u7684DEF\u6c34\u5e73<\/li>\n<li>\u4f7f\u7528\u7b26\u5408ISO 22241\u6807\u51c6\u7684\u9ad8\u8d28\u91cfDEF<\/li>\n<li>\u5bf9SCR\u7cfb\u7edf\u8fdb\u884c\u5b9a\u671f\u7ef4\u62a4<\/li>\n<li>\u4fdd\u6301DEF\u7ba1\u7ebf\u548c\u55b7\u5c04\u5668\u7684\u6e05\u6d01\uff0c\u907f\u514d\u6c61\u67d3<\/li>\n<li>\u53ca\u65f6\u5904\u7406\u4efb\u4f55\u4e0eSCR\u76f8\u5173\u7684\u8b66\u544a\u706f\u6216\u6545\u969c\u4ee3\u7801<\/li>\n<\/ol>\n<h2 id=\"cost-analysis\">\u8d39\u7528\u5206\u6790<\/h2>\n<p>\u4fee\u590d\u8d39\u7528\u53ef\u80fd\u56e0\u5177\u4f53\u95ee\u9898\u548c\u8f66\u8f86\u578b\u53f7\u800c\u5927\u76f8\u5f84\u5ead\u3002\u4f30\u8ba1\u8d39\u7528\u5982\u4e0b\uff1a<\/p>\n<table>\n<thead>\n<tr>\n<th>\u4fee\u590d<\/th>\n<th>\u7f8e\u5143<\/th>\n<th>\u6b27\u5143<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>DEF\u8865\u5145<\/td>\n<td>$20-$50<\/td>\n<td>\u20ac17-\u20ac42<\/td>\n<\/tr>\n<tr>\n<td>DEF\u538b\u529b\u4f20\u611f\u5668\u66f4\u6362<\/td>\n<td>$150-$300<\/td>\n<td>\u20ac127-\u20ac254<\/td>\n<\/tr>\n<tr>\n<td>DEF\u55b7\u5c04\u5668\u6e05\u6d01\/\u66f4\u6362<\/td>\n<td>$200-$500<\/td>\n<td>\u20ac169-\u20ac423<\/td>\n<\/tr>\n<tr>\n<td>DEF\u8ba1\u91cf\u5355\u5143\u66f4\u6362<\/td>\n<td>$500-$1500<\/td>\n<td>\u20ac423-\u20ac1270<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u4eba\u5de5\u6210\u672c\u901a\u5e38\u5728\u6bcf\u5c0f\u65f6100\u5230200\u7f8e\u5143\uff0885\u5230169\u6b27\u5143\uff09\u4e4b\u95f4\uff0c\u5177\u4f53\u53d6\u51b3\u4e8e\u5730\u533a\u548c\u4fee\u7406\u8bbe\u65bd\u3002<\/p>\n<h2 id=\"related-issues-and-fault-codes\">\u76f8\u5173\u95ee\u9898\u548c\u6545\u969c\u4ee3\u7801<\/h2>\n<p>\u53ef\u80fd\u4e0eSPN 4339\u4e00\u8d77\u51fa\u73b0\u7684\u5e38\u89c1\u95ee\u9898\u5305\u62ec\uff1a<\/p>\n<ol>\n<li>DEF\u8d28\u91cf\u95ee\u9898<\/li>\n<li>SCR\u7cfb\u7edf\u6548\u7387\u964d\u4f4e<\/li>\n<li>\u71c3\u6cb9\u6d88\u8017\u589e\u52a0<\/li>\n<\/ol>\n<p>\u76f8\u5173\u6545\u969c\u4ee3\u7801\uff1a<\/p>\n<ol>\n<li>SPN 4364\uff1a\u901a\u5e38\u4e0eSPN 4339\u4e00\u8d77\u51fa\u73b0\uff0c\u6307\u793aSCR\u7cfb\u7edf\u95ee\u9898<\/li>\n<li><a href=\"https:\/\/www.ziptuning.com\/zh\/blog\/spn-5246-aftertreatment-scr-operator-inducement-severity-2\/\" title=\"SPN 5246\uff1a\u4e0eDEF\u8d28\u91cf\u6216\u6db2\u4f4d\u95ee\u9898\u76f8\u5173\">SPN 5246\uff1a\u4e0eDEF\u8d28\u91cf\u6216\u6db2\u4f4d\u95ee\u9898\u76f8\u5173<\/a><\/li>\n<\/ol>\n<h2 id=\"additional-information\">\u9644\u52a0\u4fe1\u606f<\/h2>\n<p>DEF\u6d88\u8017\u901a\u5e38\u5360\u71c3\u6cb9\u6d88\u8017\u76842-3%\u3002\u4f8b\u5982\uff0c\u4e00\u8f86\u5361\u8f66\u6bcf100\u516c\u91cc\uff0862\u82f1\u91cc\uff09\u6d88\u8017100\u5347\uff0826.4\u52a0\u4ed1\uff09\u67f4\u6cb9\uff0c\u5219\u5728\u76f8\u540c\u8ddd\u79bb\u5185\u5927\u7ea6\u4f1a\u6d88\u80172-3\u5347\uff080.5-0.8\u52a0\u4ed1\uff09\u7684DEF\u3002<\/p>\n<p>SCR\u7cfb\u7edf\u7684\u6b63\u786e\u7ef4\u62a4\u5bf9\u4e8e\u6ee1\u8db3\u6392\u653e\u6807\u51c6\u81f3\u5173\u91cd\u8981\uff0c\u4ee5\u907f\u514d\u53ef\u80fd\u5bfc\u81f4\u53d1\u52a8\u673a\u964d\u989d\u7684\u6f5c\u5728\u95ee\u9898\uff0c\u8fd9\u53ef\u80fd\u663e\u8457\u5f71\u54cd\u8f66\u8f86\u6027\u80fd\u548c\u8fd0\u8425\u6210\u672c\u3002<\/p>\n<h2 id=\"fault-code-spn-4339-faq\">\u6545\u969c\u4ee3\u7801SPN 4339\u5e38\u89c1\u95ee\u9898\u89e3\u7b54\uff08FAQ\uff09<\/h2>\n<h3 id=\"what-does-spn-4339-indicate-\">SPN 4339\u8868\u793a\u4ec0\u4e48\uff1f<\/h3>\n<p>SPN 4339\u4e0e\u9009\u62e9\u6027\u50ac\u5316\u8fd8\u539f\uff08SCR\uff09\u7cfb\u7edf\u76f8\u5173\uff0c\u901a\u5e38\u8868\u793aDEF\uff08\u67f4\u6cb9\u6392\u6c14\u6db2\uff09\u538b\u529b\u6216\u7cfb\u7edf\u56de\u9000\u5230\u5148\u524d\u72b6\u6001\u7684\u95ee\u9898\u3002<\/p>\n<h3 id=\"is-it-safe-to-continue-driving-with-spn-4339-active-\">\u5e26\u6709SPN 4339\u4ee3\u7801\u7ee7\u7eed\u9a7e\u9a76\u662f\u5426\u5b89\u5168\uff1f<\/h3>\n<p>\u5c3d\u7ba1\u53ef\u80fd\u4e0d\u9700\u8981\u7acb\u5373\u505c\u8f66\uff0c\u4f46\u5efa\u8bae\u5c3d\u5feb\u89e3\u51b3\u6b64\u95ee\u9898\uff0c\u4ee5\u9632\u6b62\u5bf9SCR\u7cfb\u7edf\u7684\u6f5c\u5728\u635f\u574f\u6216\u8fdb\u4e00\u6b65\u590d\u6742\u95ee\u9898\u3002<\/p>\n<h3 id=\"what-vehicles-commonly-experience-spn-4339-\">\u54ea\u4e9b\u8f66\u8f86\u5e38\u89c1SPN 4339\u4ee3\u7801\uff1f<\/h3>\n<p>SPN 4339\u901a\u5e38\u9002\u7528\u4e8e\u914d\u5907SCR\u6280\u672f\u7684\u5404\u79cd\u67f4\u6cb9\u53d1\u52a8\u673a\uff0c\u5c24\u5176\u662f\u4e2d\u578b\u548c\u91cd\u578b\u5361\u8f66\u3002<\/p>\n<h3 id=\"what-are-the-main-components-involved-with-spn-4339-\">\u4e0eSPN 4339\u76f8\u5173\u7684\u4e3b\u8981\u7ec4\u4ef6\u662f\u4ec0\u4e48\uff1f<\/h3>\n<p>\u4e0eSPN 4339\u76f8\u5173\u7684\u4e3b\u8981\u7ec4\u4ef6\u5305\u62ecSCR\u7cfb\u7edf\u3001DEF\u8ba1\u91cf\u5355\u5143\u3001DEF\u538b\u529b\u4f20\u611f\u5668\u548cDEF\u7ba1\u7ebf\u53ca\u55b7\u5c04\u5668\u3002<\/p>\n<h3 id=\"what-are-common-causes-of-spn-4339-\">SPN 4339\u7684\u5e38\u89c1\u539f\u56e0\u662f\u4ec0\u4e48\uff1f<\/h3>\n<p>\u5e38\u89c1\u539f\u56e0\u5305\u62ecDEF\u538b\u529b\u8fc7\u4f4e\u3001\u6545\u969c\u7684DEF\u8ba1\u91cf\u5355\u5143<\/p>\n<p>\u3001\u5835\u585e\u7684DEF\u55b7\u5c04\u5668\u3001\u635f\u574f\u7684DEF\u7ba1\u7ebf\u548c\u6545\u969c\u7684DEF\u538b\u529b\u4f20\u611f\u5668\u3002<\/p>\n<h3 id=\"how-do-i-diagnose-spn-4339-\">\u5982\u4f55\u8bca\u65adSPN 4339\uff1f<\/h3>\n<p>\u8bca\u65ad\u8fc7\u7a0b\u6d89\u53ca\u5c06\u8bca\u65ad\u5de5\u5177\u8fde\u63a5\u5230\u53d1\u52a8\u673aECM\uff0c\u68c0\u7d22\u6545\u969c\u4ee3\u7801\uff0c\u68c0\u67e5DEF\u6c34\u5e73\u548c\u8d28\u91cf\uff0c\u68c0\u67e5DEF\u7ba1\u7ebf\uff0c\u6d4b\u8bd5\u538b\u529b\u4f20\u611f\u5668\uff0c\u4ee5\u53ca\u68c0\u67e5\u8ba1\u91cf\u5355\u5143\u548c\u55b7\u5c04\u5668\u3002<\/p>\n<h3 id=\"what-tools-are-needed-to-diagnose-spn-4339-\">\u8bca\u65adSPN 4339\u9700\u8981\u54ea\u4e9b\u5de5\u5177\uff1f<\/h3>\n<p>\u9700\u8981\u8bca\u65ad\u626b\u63cf\u4eea\u548c\u53ef\u80fd\u7684DEF\u7cfb\u7edf\u538b\u529b\u6d4b\u8bd5\u4eea\uff0c\u4ee5\u8fdb\u884c\u51c6\u786e\u7684\u8bca\u65ad\u3002<\/p>\n<h3 id=\"can-spn-4339-be-fixed-without-visiting-a-dealer-\">SPN 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id=\"how-does-spn-4339-affect-vehicle-performance-\">SPN 4339\u5982\u4f55\u5f71\u54cd\u8f66\u8f86\u6027\u80fd\uff1f<\/h3>\n<p>SPN 4339\u53ef\u80fd\u5bfc\u81f4\u53d1\u52a8\u673a\u529f\u7387\u964d\u4f4e\u3001SCR\u7cfb\u7edf\u6548\u7387\u964d\u4f4e\u548c\u71c3\u6cb9\u6d88\u8017\u589e\u52a0\u3002<\/p>\n<h3 id=\"what-is-the-role-of-def-in-relation-to-spn-4339-\">DEF\u5728SPN 4339\u4e2d\u8d77\u4ec0\u4e48\u4f5c\u7528\uff1f<\/h3>\n<p>DEF\u5bf9\u4e8eSCR\u7cfb\u7edf\u7684\u64cd\u4f5c\u81f3\u5173\u91cd\u8981\u3002DEF\u7684\u538b\u529b\u3001\u8d28\u91cf\u6216\u4f9b\u5e94\u95ee\u9898\u53ef\u80fd\u4f1a\u89e6\u53d1SPN 4339\u3002<\/p>\n<h3 id=\"can-weather-conditions-affect-the-occurrence-of-spn-4339-\">\u5929\u6c14\u6761\u4ef6\u4f1a\u5f71\u54cdSPN 4339\u7684\u51fa\u73b0\u5417\uff1f<\/h3>\n<p>\u6781\u7aef\u6e29\u5ea6\u53ef\u80fd\u5f71\u54cdDEF\u8d28\u91cf\u548cSCR\u7cfb\u7edf\u6027\u80fd\uff0c\u4ece\u800c\u53ef\u80fd\u5bfc\u81f4SPN 4339\u7684\u53d1\u751f\u3002<\/p>\n<h3 id=\"how-often-should-the-scr-system-be-maintained-to-prevent-spn-4339-\">SCR\u7cfb\u7edf\u5e94\u591a\u4e45\u7ef4\u62a4\u4e00\u6b21\u4ee5\u9632\u6b62SPN 4339\uff1f<\/h3>\n<p>\u9075\u5faa\u5236\u9020\u5546\u7684\u63a8\u8350\u7ef4\u62a4\u8ba1\u5212\uff0c\u901a\u5e38\u6d89\u53ca\u5b9a\u671f\u68c0\u67e5DEF\u8d28\u91cf\u548c\u7cfb\u7edf\u3002<\/p>\n<h3 id=\"what-is-the-impact-of-spn-4339-on-emissions-compliance-\">SPN 4339\u5bf9\u6392\u653e\u5408\u89c4\u7684\u5f71\u54cd\u662f\u4ec0\u4e48\uff1f<\/h3>\n<p>SPN 4339\u53ef\u80fd\u8868\u660e\u4f1a\u5f71\u54cd\u8f66\u8f86\u6392\u653e\u5408\u89c4\u6027\u7684\u95ee\u9898\uff0c\u53ef\u80fd\u5bfc\u81f4NOx\u6392\u653e\u589e\u52a0\u3002<\/p>\n<h3 id=\"is-spn-4339-specific-to-certain-engine-manufacturers-\">SPN 4339\u662f\u7279\u5b9a\u53d1\u52a8\u673a\u5236\u9020\u5546\u7279\u6709\u7684\u5417\uff1f<\/h3>\n<p>\u867d\u7136\u5e76\u975e\u7279\u5b9a\u4e8e\u67d0\u4e00\u5236\u9020\u5546\uff0c\u4f46SPN 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