{"id":288029,"date":"2024-10-25T05:54:24","date_gmt":"2024-10-25T05:54:24","guid":{"rendered":"https:\/\/www.ziptuning.com\/zh\/?p=288029"},"modified":"2024-10-28T10:21:14","modified_gmt":"2024-10-28T10:21:14","slug":"spn-4334-aftertreatment-1-diesel-exhaust-fluid-pump-motor-speed","status":"publish","type":"post","link":"https:\/\/www.ziptuning.com\/zh\/blog\/spn-4334-aftertreatment-1-diesel-exhaust-fluid-pump-motor-speed\/","title":{"rendered":"SPN 4334: \u540e\u5904\u74061\u67f4\u6cb9\u6392\u653e\u6db2\u6cf5\u7535\u673a\u901f\u5ea6"},"content":{"rendered":"<p>\u6545\u969c\u4ee3\u7801 SPN 4334\uff1a\u67f4\u6cb9\u6392\u653e\u6db2\u538b\u529b\u8fc7\u4f4e<\/p>\n<h2 id=\"urgency\">\u7d27\u6025\u6027<\/h2>\n<p>\u5982\u679c\u60a8\u6536\u5230\u6545\u969c\u4ee3\u7801 SPN 4334\uff0c\u8868\u793a\u67f4\u6cb9\u6392\u653e\u6db2\u538b\u529b\u8fc7\u4f4e\uff0c<strong>\u60a8\u5e94\u7acb\u5373\u505c\u6b62\u9a7e\u9a76\u5e76\u5bfb\u6c42\u670d\u52a1<\/strong>\u3002\u7ee7\u7eed\u9a7e\u9a76\u6b64\u6545\u969c\u6fc0\u6d3b\u7684\u60c5\u51b5\u4e0b\u53ef\u80fd\u5bfc\u81f4\u53d1\u52a8\u673a\u964d\u901f\u81f35\u82f1\u91cc\u6bcf\u5c0f\u65f6\uff088\u516c\u91cc\u6bcf\u5c0f\u65f6\uff09\uff0c\u5e76\u53ef\u80fd\u5bfc\u81f4SCR\u7cfb\u7edf\u7684\u6c38\u4e45\u6027\u635f\u574f\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\u7801 SPN 4334\uff0c\u867d\u7136\u5b83\u5728\u5404\u79cd\u54c1\u724c\u4e2d\u90fd\u6709\u51fa\u73b0\uff0c\u4f46\u4f3c\u4e4e\u5728\u6b27\u6d32\u5361\u8f66\u4e0a\u66f4\u4e3a\u5e38\u89c1\uff0c\u6bd4\u5982\u6c83\u5c14\u6c83\u3001\u6885\u8d5b\u5fb7\u65af-\u5954\u9a70\u548cMAN\u3002\u5c31\u5728\u4e0a\u5468\uff0c\u6211\u4eec\u63a5\u6536\u4e86\u4e00\u8f86\u6c83\u5c14\u6c83FH16\uff0cDEF\u706f\u4eae\u8d77\u5e76\u964d\u901f\u81f35\u82f1\u91cc\u6bcf\u5c0f\u65f6\u3002\u7ed3\u679c\u53d1\u73b0\u662f\u7ecf\u5178\u7684\u7ed3\u6676\u5316DEF\u5835\u585e\u4e86\u7ba1\u9053\u548c\u5242\u91cf\u9600\uff0c\u89e6\u53d1\u4e86\u4f4e\u538b\u4ee3\u7801\u3002\u6211\u4eec\u5728\u6885\u8d5b\u5fb7\u65af-\u5954\u9a70Actros\u548cMAN TGX\u4e0a\u4e5f\u89c1\u8fc7\u7c7b\u4f3c\u95ee\u9898\u3002\u6bcf\u5f53\u8fd9\u4e2a\u4ee3\u7801\u51fa\u73b0\u65f6\uff0c\u6211\u4eec\u77e5\u9053\u8981\u5148\u68c0\u67e5DEF\u7f50\u3001\u6cf5\u548c\u7ba1\u9053\u662f\u5426\u6709\u6c61\u67d3\u6216\u6cc4\u6f0f\u7684\u8ff9\u8c61\u3002\u901a\u5e38\uff0c\u5f7b\u5e95\u6e05\u6d01\u6216\u66f4\u6362\u51e0\u4ef6\u96f6\u4ef6\u5c31\u80fd\u8ba9\u5b83\u4eec\u91cd\u65b0\u4e0a\u8def\uff0c\u4f46\u8fd9\u786e\u5b9e\u662f\u4e00\u4e2a\u53cd\u590d\u51fa\u73b0\u7684\u5934\u75db\u95ee\u9898\uff0c\u5c24\u5176\u662f\u5728\u8fd9\u4e9b\u6b27\u6d32\u8f66\u578b\u4e0a\u3002<\/p>\n<\/div>\n<h2 id=\"code-details\">\u4ee3\u7801\u8be6\u60c5<\/h2>\n<p>SPN 4334\u662f\u4e00\u4e2a\u901a\u7528\u7684J1939\u6545\u969c\u4ee3\u7801\uff0c\u9002\u7528\u4e8e\u8bb8\u591a\u914d\u5907\u9009\u62e9\u6027\u50ac\u5316\u8fd8\u539f\uff08SCR\uff09\u7cfb\u7edf\u7684\u67f4\u6cb9\u8f66\u8f86\u3002\u8be5\u4ee3\u7801\u8868\u793a\u67f4\u6cb9\u6392\u653e\u6db2\uff08DEF\uff09\u538b\u529b\u4f4e\u4e8e\u6b63\u5e38\u64cd\u4f5c\u8303\u56f4\u3002<\/p>\n<h2 id=\"parts-involved\">\u76f8\u5173\u90e8\u4ef6<\/h2>\n<p>\u4e0eSPN 4334\u76f8\u5173\u7684\u4e3b\u8981\u7ec4\u4ef6\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>DEF\u7f50<\/strong>\uff1a\u50a8\u5b58\u67f4\u6cb9\u6392\u653e\u6db2<\/li>\n<li><strong>DEF\u6cf5<\/strong>\uff1a\u52a0\u538bDEF\u5e76\u5c06\u5176\u53d1\u9001\u5230\u5242\u91cf\u9600<\/li>\n<li><strong>DEF\u538b\u529b\u4f20\u611f\u5668<\/strong>\uff1a\u6d4b\u91cfDEF\u538b\u529b\u5e76\u5411DEF\u63a7\u5236\u6a21\u5757\u53d1\u9001\u4fe1\u53f7<\/li>\n<li><strong>DEF\u5242\u91cf\u9600<\/strong>\uff1a\u5728SCR\u50ac\u5316\u5242\u4e4b\u524d\u5c06DEF\u55b7\u5165\u6392\u6c14\u6d41\u4e2d<\/li>\n<li><strong>DEF\u7ba1\u9053\u548c\u7ebf\u675f<\/strong>\uff1a\u5728\u7ec4\u4ef6\u4e4b\u95f4\u4f20\u9012DEF\u548c\u7535\u4fe1\u53f7<\/li>\n<\/ul>\n<h2 id=\"common-causes\">\u5e38\u89c1\u539f\u56e0<\/h2>\n<p>\u4f4eDEF\u538b\u529b\u7684\u4e00\u4e9b\u5178\u578b\u539f\u56e0\u5305\u62ec\uff1a<\/p>\n<ol>\n<li>\u7ed3\u6676\u5316DEF\u5835\u585e\u7ba1\u9053\u3001\u6cf5\u6216\u5242\u91cf\u9600<\/li>\n<li>\u6545\u969c\u7684DEF\u6cf5\u65e0\u6cd5\u5efa\u7acb\u8db3\u591f\u7684\u538b\u529b<\/li>\n<li>\u6cc4\u6f0f\u7684DEF\u7ba1\u9053\u6216\u8fde\u63a5\u4ef6\u5bfc\u81f4\u538b\u529b\u635f\u5931<\/li>\n<li>\u6545\u969c\u7684DEF\u538b\u529b\u4f20\u611f\u5668\u7ed9\u51fa\u9519\u8bef\u8bfb\u6570<\/li>\n<li>\u6cf5\u6216\u538b\u529b\u4f20\u611f\u5668\u7684\u7535\u7ebf\u95ee\u9898<\/li>\n<li>DEF\u6db2\u4f4d\u4f4e<\/li>\n<li>\u6c61\u67d3\u6216\u964d\u89e3\u7684DEF\u6db2<\/li>\n<\/ol>\n<h2 id=\"diagnosis-steps\">\u8bca\u65ad\u6b65\u9aa4<\/h2>\n<p>\u8981\u6392\u67e5SPN 4334\u6545\u969c\uff1a<\/p>\n<ol>\n<li>\u68c0\u67e5DEF\u6db2\u4f4d\uff0c\u82e5\u6db2\u4f4d\u4f4e\u5219\u52a0\u6ee1<\/li>\n<li>\u76ee\u89c6\u68c0\u67e5DEF\u7f50\u3001\u6cf5\u3001\u7ba1\u9053\u662f\u5426\u6709\u6cc4\u6f0f\u6216\u7ed3\u6676\u73b0\u8c61<\/li>\n<li>\u7528\u538b\u529b\u8868\u786e\u8ba4DEF\u538b\u529b\uff0c\u6b63\u5e38\u8303\u56f4\u5e94\u4e3a517-586 kPa\uff0875-85 psi\uff09<\/li>\n<li>\u6d4b\u8bd5DEF\u6cf5\u7684\u64cd\u4f5c\u548c\u538b\u529b\u8f93\u51fa<\/li>\n<li>\u6d4b\u8bd5\u538b\u529b\u4f20\u611f\u5668\u7684\u7535\u963b\u5e76\u68c0\u67e5\u7535\u7ebf\u662f\u5426\u5f00\u8def\u6216\u77ed\u8def<\/li>\n<li>\u62c6\u5378\u5242\u91cf\u9600\uff0c\u68c0\u67e5\u662f\u5426\u5835\u585e<\/li>\n<\/ol>\n<h2 id=\"repair-solutions\">\u4fee\u590d\u65b9\u6848<\/h2>\n<p>\u4f4eDEF\u538b\u529b\u7684\u4fee\u590d\u63aa\u65bd\u5c06\u53d6\u51b3\u4e8e\u8bca\u65ad\u51fa\u7684\u539f\u56e0\uff1a<\/p>\n<ul>\n<li>\u5982\u679c\u53d1\u73b0\u7ed3\u6676\u5316DEF\uff0c\u5219\u9700\u8981\u62c6\u5378\u7ba1\u9053\u548c\u7ec4\u4ef6\uff0c\u4f7f\u7528\u70ed\u6c34\u6e05\u6d17\uff0c\u7136\u540e\u5728\u91cd\u65b0\u7ec4\u88c5\u524d\u667e\u5e72<\/li>\n<li>\u6545\u969c\u7684\u6cf5\u3001\u538b\u529b\u4f20\u611f\u5668\u6216\u5242\u91cf\u9600\u9700\u8981\u66f4\u6362<\/li>\n<li>\u6cc4\u6f0f\u7684\u7ba1\u9053\u6216\u8fde\u63a5\u4ef6\u5fc5\u987b\u66f4\u6362\u6216\u7d27\u56fa<\/li>\n<li>\u6545\u969c\u7684\u7535\u7ebf\u9700\u8981\u4fee\u590d<\/li>\n<li>\u6c61\u67d3\u7684DEF\u5e94\u6392\u51fa\u5e76\u66f4\u6362\u7b26\u5408ISO 22241\u6807\u51c6\u7684\u65b0\u6db2\u4f53<\/li>\n<\/ul>\n<h2 id=\"prevention\">\u9884\u9632<\/h2>\n<p>\u4e3a\u907f\u514d\u4f4eDEF\u538b\u529b\u95ee\u9898\uff0c\u8bf7\uff1a<\/p>\n<ul>\n<li>\u4fdd\u6301\u9002\u5f53\u7684DEF\u6db2\u4f4d\uff0c\u786e\u4fdd\u5728\u7f50\u5185\u6db2\u4f53\u8017\u5c3d\u524d\u8fdb\u884c\u52a0\u6ee1<\/li>\n<li>\u4ec5\u4f7f\u7528\u6765\u81ea\u53ef\u9760\u4f9b\u5e94\u5546\u7684\u9ad8\u54c1\u8d28DEF\u6db2\u4f53<\/li>\n<li>\u5b9a\u671f\u68c0\u67e5DEF\u7cfb\u7edf\u4ee5\u53d1\u73b0\u6cc4\u6f0f\u6216\u7ed3\u6676\u73b0\u8c61<\/li>\n<li>\u4fdd\u6301DEF\u7f50\u548c\u52a0\u6cb9\u53e3\u7684\u6e05\u6d01\uff0c\u4ee5\u9632\u6c61\u67d3<\/li>\n<li>\u5728\u5bd2\u51b7\u5929\u6c14\u4e0b\uff0c\u5c06\u8f66\u8f86\u505c\u653e\u5728\u8f66\u5e93\u6216\u6709\u906e\u76d6\u7684\u533a\u57df\uff0c\u5c3d\u91cf\u51cf\u5c11DEF\u6db2\u7ed3\u51b0<\/li>\n<\/ul>\n<h2 id=\"repair-cost\">\u4fee\u7406\u8d39\u7528<\/h2>\n<p>\u4fee\u590d\u4f4eDEF\u538b\u529b\u7684\u603b\u8d39\u7528\u5c06\u6839\u636e\u9700\u8981\u66f4\u6362\u7684\u96f6\u4ef6\u548c\u5f53\u5730\u7684\u4eba\u5de5\u8d39\u800c\u6709\u6240\u4e0d\u540c\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u96f6\u4ef6\u7684\u5927\u81f4\u8d39\u7528\uff1a<\/p>\n<ul>\n<li>DEF\u6cf5\uff1a500-800\u7f8e\u5143 \/ 450-700\u6b27\u5143<\/li>\n<li>DEF\u538b\u529b\u4f20\u611f\u5668\uff1a200-400\u7f8e\u5143 \/ 180-350\u6b27\u5143<\/li>\n<li>DEF\u5242\u91cf\u9600\uff1a600-1200\u7f8e\u5143 \/ 550-1000\u6b27\u5143<\/li>\n<li>DEF\u7ba1\u9053\uff1a\u6bcf\u676150-200\u7f8e\u5143 \/ 45-180\u6b27\u5143<\/li>\n<\/ul>\n<p>\u4eba\u5de5\u65f6\u95f4\u901a\u5e38\u4e3a2-8\u5c0f\u65f6\uff0c\u5177\u4f53\u53d6\u51b3\u4e8e\u6240\u9700\u7684\u4fee\u7406\u7a0b\u5ea6\u3002\u6309\u6bcf\u5c0f\u65f6100\u7f8e\u5143\uff0890\u6b27\u5143\uff09\u7684\u5e73\u5747\u8f66\u95f4\u8d39\u8ba1\u7b97\uff0c\u4eba\u5de5\u8d39\u7528\u7ea6\u4e3a200-800\u7f8e\u5143\uff08180-720\u6b27\u5143\uff09\u3002<\/p>\n<p>\u56e0\u6b64\uff0c\u4fee\u590dSPN 4334\u7684\u6839\u672c\u539f\u56e0\u7684\u603b\u8d39\u7528\u53ef\u80fd\u4ece\u51e0\u767e\u7f8e\u5143\uff08\u4f8b\u5982\u7b80\u5355\u7684\u6e05\u6d17\u6216\u66f4\u6362\u7ba1\u9053\uff09\u5230\u8d85\u8fc72000\u7f8e\u5143\uff081800\u6b27\u5143\uff09\uff0c\u5982\u679c\u9700\u8981\u66f4\u6362\u591a\u4e2a\u4e3b\u8981\u7ec4\u4ef6\u3002<\/p>\n<h2 id=\"related-faults\">\u76f8\u5173\u6545\u969c<\/h2>\n<p>\u53ef\u80fd\u4e0eSPN 4334\u4e00\u8d77\u51fa\u73b0\u7684\u4e00\u4e9b\u5176\u4ed6\u6545\u969c\u4ee3\u7801\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><a href=\"https:\/\/www.ziptuning.com\/zh\/blog\/spn-3031-aftertreatment-1-outlet-nox-sensor-heater-issues\/\" title=\"SPN 3031 - \u540e\u5904\u74061\u51fa\u53e3NOx\u4f20\u611f\u5668\">SPN 3031 &#8211; \u540e\u5904\u74061\u51fa\u53e3NOx\u4f20\u611f\u5668<\/a><\/li>\n<li><a href=\"https:\/\/www.ziptuning.com\/zh\/blog\/spn-4094-nox-limits-exceeded-due-to-insufficient-def-quality\/\" title=\"SPN 4094 - NOx\u6548\u7387\u4f4e\">SPN 4094 &#8211; NOx\u6548\u7387\u4f4e<\/a><\/li>\n<li><a href=\"https:\/\/www.ziptuning.com\/zh\/blog\/spn-4335-def-air-pressure\/\" title=\"SPN 4335 - DEF\u6c14\u538b\">SPN 4335 &#8211; DEF\u6c14\u538b<\/a><\/li>\n<li><a href=\"https:\/\/www.ziptuning.com\/zh\/blog\/spn-4360-aftertreatment-1-scr-conversion-efficiency\/\" title=\"SPN 4360 - \u540e\u5904\u7406SCR\u6548\u7387\u4f4e\">SPN 4360 &#8211; \u540e\u5904\u7406SCR\u6548\u7387\u4f4e<\/a><\/li>\n<li><a href=\"https:\/\/www.ziptuning.com\/zh\/blog\/spn-5394-def-dosing-valve\/\" title=\"SPN 5394 - DEF\u5242\u91cf\u9600\">SPN 5394 &#8211; DEF\u5242\u91cf\u9600<\/a><\/li>\n<\/ul>\n<p>\u770b\u5230\u8fd9\u4e9b\u4f34\u968f\u7684\u4ee3\u7801\u53ef\u4ee5\u5e2e\u52a9\u6307\u5411\u6f5c\u5728\u7684\u95ee\u9898\u3002\u4f8b\u5982\uff0cSPN 3031\u548c4360\u4e0e4334\u4e00\u8d77\u51fa\u73b0\u5f3a\u70c8\u8868\u660e\u7ed3\u6676\u5316\u7684DEF\u5835\u585e\u4e86\u7cfb\u7edf\u3002<\/p>\n<h2 id=\"frequently-asked-questions-about-spn-4334\">\u5173\u4e8eSPN 4334\u7684\u5e38\u89c1\u95ee\u9898<\/h2>\n<h3 id=\"what-does-fault-code-spn-4334-mean-\">\u6545\u969c\u4ee3\u7801SPN 4334\u610f\u5473\u7740\u4ec0\u4e48\uff1f<\/h3>\n<p>SPN 4334\u8868\u793a\u67f4\u6cb9\u6392\u653e\u6db2\uff08DEF\uff09\u538b\u529b\u8fc7\u4f4e\uff0c\u4f4e\u4e8e\u6b63\u5e38\u64cd\u4f5c\u8303\u56f4\u3002<\/p>\n<h3 id=\"what-are-the-possible-causes-of-spn-4334-\">SPN 4334\u7684\u53ef\u80fd\u539f\u56e0\u662f\u4ec0\u4e48\uff1f<\/h3>\n<p>\u5e38\u89c1\u539f\u56e0\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>\u7ed3\u6676\u5316DEF\u5835\u585e\u7ba1\u9053\u3001\u6cf5\u6216\u5242\u91cf\u9600<\/li>\n<li>\u6545\u969c\u7684DEF\u6cf5\u65e0\u6cd5\u5efa\u7acb\u8db3\u591f\u7684\u538b\u529b<\/li>\n<li>\u6cc4\u6f0f\u7684DEF\u7ba1\u9053\u6216\u8fde\u63a5\u4ef6\u5bfc\u81f4\u538b\u529b\u635f\u5931<\/li>\n<li>\u6545\u969c\u7684DEF\u538b\u529b\u4f20\u611f\u5668\u7ed9\u51fa\u9519\u8bef\u8bfb\u6570<\/li>\n<li>\u6cf5\u6216\u538b\u529b\u4f20\u611f\u5668\u7684\n<p>\u7535\u7ebf\u95ee\u9898<\/li>\n<li>DEF\u6db2\u4f4d\u4f4e<\/li>\n<li>\u6c61\u67d3\u6216\u964d\u89e3\u7684DEF\u6db2<\/li>\n<\/ul>\n<h3 id=\"what-systems-are-affected-by-spn-4334-\">\u54ea\u4e9b\u7cfb\u7edf\u53d7\u5230SPN 4334\u7684\u5f71\u54cd\uff1f<\/h3>\n<p>\u6b64\u4ee3\u7801\u4e0e\u4f7f\u7528DEF\u51cf\u5c11NOx\u6392\u653e\u7684\u9009\u62e9\u6027\u50ac\u5316\u8fd8\u539f\uff08SCR\uff09\u540e\u5904\u7406\u7cfb\u7edf\u76f8\u5173\u3002\u4e3b\u8981\u6d89\u53ca\u7684\u7ec4\u4ef6\u5305\u62ecDEF\u7f50\u3001\u6cf5\u3001\u538b\u529b\u4f20\u611f\u5668\u3001\u5242\u91cf\u9600\u3001\u7ba1\u9053\u548c\u7ebf\u675f\u3002<\/p>\n<h3 id=\"is-it-safe-to-drive-with-an-active-spn-4334-\">\u5728SPN 4334\u6fc0\u6d3b\u65f6\u9a7e\u9a76\u662f\u5426\u5b89\u5168\uff1f<\/h3>\n<p>\u4e0d\u5b89\u5168\uff0c\u5982\u679c\u60a8\u6536\u5230\u6b64\u6545\u969c\u4ee3\u7801\uff0c\u5e94\u7acb\u5373\u505c\u6b62\u9a7e\u9a76\u5e76\u8ba9\u8f66\u8f86\u63a5\u53d7\u670d\u52a1\u3002\u7ee7\u7eed\u64cd\u4f5c\u53d1\u52a8\u673a\u53ef\u80fd\u5bfc\u81f4\u5176\u964d\u901f\u81f35\u82f1\u91cc\u6bcf\u5c0f\u65f6\uff088\u516c\u91cc\u6bcf\u5c0f\u65f6\uff09\uff0c\u5e76\u53ef\u80fd\u5bfc\u81f4SCR\u7cfb\u7edf\u7684\u6c38\u4e45\u6027\u635f\u574f\u3002<\/p>\n<h3 id=\"what-are-the-symptoms-of-low-def-pressure-\">\u4f4eDEF\u538b\u529b\u7684\u75c7\u72b6\u662f\u4ec0\u4e48\uff1f<\/h3>\n<p>\u9664\u4e86\u53d1\u52a8\u673a\u6545\u969c\u706f\u548c\u6545\u969c\u4ee3\u7801\u5916\uff0c\u60a8\u53ef\u80fd\u4f1a\u6ce8\u610f\u5230\u7531\u4e8e\u964d\u901f\u5bfc\u81f4\u7684\u53d1\u52a8\u673a\u52a8\u529b\u4e27\u5931\u3002DEF\u7cfb\u7edf\u7ec4\u4ef6\u5468\u56f4\u53ef\u80fd\u8fd8\u4f1a\u51fa\u73b0\u53ef\u89c1\u7684\u6cc4\u6f0f\u6216\u7ed3\u6676\u3002<\/p>\n<h3 id=\"how-is-spn-4334-diagnosed-\">\u5982\u4f55\u8bca\u65adSPN 4334\uff1f<\/h3>\n<p>\u5173\u952e\u7684\u6545\u969c\u6392\u67e5\u6b65\u9aa4\u5305\u62ec\uff1a<\/p>\n<ol>\n<li>\u68c0\u67e5DEF\u6db2\u4f4d\u548c\u8d28\u91cf<\/li>\n<li>\u76ee\u89c6\u68c0\u67e5\u6cc4\u6f0f\u6216\u7ed3\u6676\u73b0\u8c61<\/li>\n<li>\u4f7f\u7528\u538b\u529b\u8868\u9a8c\u8bc1\u5b9e\u9645DEF\u538b\u529b<\/li>\n<li>\u6d4b\u8bd5\u6cf5\u7684\u64cd\u4f5c\u548c\u538b\u529b\u8f93\u51fa<\/li>\n<li>\u68c0\u67e5\u538b\u529b\u4f20\u611f\u5668\u548c\u7535\u7ebf\u662f\u5426\u5b58\u5728\u6545\u969c<\/li>\n<li>\u68c0\u67e5\u5242\u91cf\u9600\u662f\u5426\u5835\u585e<\/li>\n<\/ol>\n<h3 id=\"what-repairs-are-needed-to-fix-low-def-pressure-\">\u4fee\u590d\u4f4eDEF\u538b\u529b\u9700\u8981\u54ea\u4e9b\u4fee\u7406\uff1f<\/h3>\n<p>\u8fd9\u5c06\u53d6\u51b3\u4e8e\u6839\u672c\u539f\u56e0\u3002\u7ed3\u6676\u5316DEF\u5c06\u9700\u8981\u6e05\u6d17\u7ba1\u9053\u548c\u7ec4\u4ef6\u3002\u6545\u969c\u7684\u6cf5\u3001\u4f20\u611f\u5668\u6216\u9600\u95e8\u9700\u8981\u66f4\u6362\u3002\u6cc4\u6f0f\u5fc5\u987b\u5bc6\u5c01\uff0c\u7535\u7ebf\u9700\u8981\u4fee\u590d\u3002\u6c61\u67d3\u7684\u6db2\u4f53\u5e94\u6392\u51fa\u5e76\u66f4\u6362\u3002<\/p>\n<h3 id=\"can-i-just-delete-the-def-system-to-avoid-this-problem-\">\u6211\u53ef\u4ee5\u5220\u9664DEF\u7cfb\u7edf\u4ee5\u907f\u514d\u8fd9\u4e2a\u95ee\u9898\u5417\uff1f<\/h3>\n<p>\u4e0d\u53ef\u4ee5\uff0c\u975e\u6cd5\u5e72\u6270\u6216\u62c6\u9664SCR\u7cfb\u7edf\u3002\u8fd9\u6837\u505a\u5c06\u5bfc\u81f4\u8f66\u8f86\u65e0\u6cd5\u6ee1\u8db3\u6392\u653e\u6cd5\u89c4\uff0c\u5e76\u53ef\u80fd\u5bfc\u81f4\u7f5a\u6b3e\u3002\u59cb\u7ec8\u8bca\u65ad\u548c\u4fee\u590d\u4efb\u4f55DEF\u6545\u969c\u7684\u6839\u672c\u539f\u56e0\u3002<\/p>\n<h3 id=\"how-much-does-it-cost-to-fix-spn-4334-\">\u4fee\u590dSPN 4334\u7684\u8d39\u7528\u662f\u591a\u5c11\uff1f<\/h3>\n<p>\u603b\u4fee\u7406\u8d39\u7528\u53ef\u80fd\u4ece\u51e0\u767e\u7f8e\u5143\u5230\u51e0\u5343\u7f8e\u5143\u4e0d\u7b49\uff0c\u5177\u4f53\u53d6\u51b3\u4e8e\u9700\u8981\u66f4\u6362\u7684\u96f6\u4ef6\u3002\u4f8b\u5982\uff0c\u4ec5\u4e00\u4e2a\u538b\u529b\u4f20\u611f\u5668\u53ef\u80fd\u9700\u8981200-400\u7f8e\u5143\uff0c\u800c\u4e00\u4e2a\u5242\u91cf\u9600\u53ef\u80fd\u9700\u8981600-1200\u7f8e\u5143\u52a0\u4e0a\u4eba\u5de5\u8d39\u7528\u3002<\/p>\n<h3 id=\"how-can-i-prevent-def-pressure-issues-\">\u6211\u5982\u4f55\u9632\u6b62DEF\u538b\u529b\u95ee\u9898\uff1f<\/h3>\n<p>\u9002\u5f53\u7684\u7ef4\u62a4\u662f\u5173\u952e\uff0c\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>\u4fdd\u6301DEF\u7f50\u5145\u6ee1\u9ad8\u8d28\u91cf\u7684\u6db2\u4f53<\/li>\n<li>\u5b9a\u671f\u68c0\u67e5\u6cc4\u6f0f\u6216\u7ed3\u6676\u73b0\u8c61<\/li>\n<li>\u4fdd\u6301\u7f50\u4f53\u548c\u52a0\u6cb9\u53e3\u6e05\u6d01<\/li>\n<li>\u5728\u5bd2\u51b7\u5929\u6c14\u4e2d\u5c3d\u53ef\u80fd\u5c06\u8f66\u8f86\u5b58\u653e\u5728\u5ba4\u5185<\/li>\n<\/ul>\n<h3 id=\"what-other-fault-codes-may-appear-with-spn-4334-\">\u4e0eSPN 4334\u53ef\u80fd\u4e00\u8d77\u51fa\u73b0\u7684\u5176\u4ed6\u6545\u969c\u4ee3\u7801\u6709\u54ea\u4e9b\uff1f<\/h3>\n<p>\u6307\u793aSCR\u95ee\u9898\u7684\u76f8\u5173\u6545\u969c\u5305\u62ecSPN <a href=\"https:\/\/www.ziptuning.com\/zh\/blog\/spn-3031-aftertreatment-1-outlet-nox-sensor-heater-issues\/\" title=\"3031\uff08NOx\u4f20\u611f\u5668\uff09\">3031\uff08NOx\u4f20\u611f\u5668\uff09<\/a>\u3001<a href=\"https:\/\/www.ziptuning.com\/zh\/blog\/spn-4094-nox-limits-exceeded-due-to-insufficient-def-quality\/\" title=\"SPN 4094\uff08NOx\u6548\u7387\uff09\">SPN 4094\uff08NOx\u6548\u7387\uff09<\/a>\u3001<a href=\"https:\/\/www.ziptuning.com\/zh\/blog\/spn-4360-aftertreatment-1-scr-conversion-efficiency\/\" title=\"SPN 4360\uff08SCR\u6548\u7387\uff09\">SPN 4360\uff08SCR\u6548\u7387\uff09<\/a><a href=\"https:\/\/www.ziptuning.com\/zh\/blog\/spn-5394-def-dosing-valve\/\" title=\"\u548cSPN 5394\uff08DEF\u5242\u91cf\u9600\uff09\">\u548cSPN 5394\uff08DEF\u5242\u91cf\u9600\uff09<\/a>\u3002\u770b\u5230\u8fd9\u4e9b\u4ee3\u7801\u4e00\u8d77\u51fa\u73b0\u6709\u52a9\u4e8e\u7f29\u5c0f\u95ee\u9898\u8303\u56f4\u3002<\/p>\n<h3 id=\"what-is-the-normal-operating-pressure-for-the-def-system-\">DEF\u7cfb\u7edf\u7684\u6b63\u5e38\u64cd\u4f5c\u538b\u529b\u662f\u591a\u5c11\uff1f<\/h3>\n<p>DEF\u538b\u529b\u901a\u5e38\u5e94\u572845-90 psi\uff08310-621 kPa\uff09\u8303\u56f4\u5185\u3002\u786e\u5207\u7684\u89c4\u683c\u56e0\u53d1\u52a8\u673a\u54c1\u724c\u548c\u578b\u53f7\u800c\u5f02\u3002<\/p>\n<h3 id=\"can-bad-def-fluid-cause-low-pressure-\">\u52a3\u8d28DEF\u6db2\u4f1a\u5bfc\u81f4\u4f4e\u538b\u529b\u5417\uff1f<\/h3>\n<p>\u662f\u7684\uff0c\u5982\u679c\u6db2\u4f53\u53d7\u5230\u6c61\u67d3\u3001\u964d\u89e3\u6216\u7c7b\u578b\u4e0d\u5f53\uff0c\u53ef\u80fd\u4f1a\u7ed3\u6676\u5e76\u5835\u585e\u7ba1\u9053\u548c\u7ec4\u4ef6\uff0c\u963b\u6b62\u6b63\u5e38\u6d41\u52a8\u548c\u538b\u529b\u3002\u59cb\u7ec8\u4f7f\u7528\u7b26\u5408ISO 22241\u6807\u51c6\u7684\u6765\u81ea\u53ef\u9760\u4f9b\u5e94\u5546\u7684DEF\u3002<\/p>\n<h3 id=\"how-do-i-check-the-def-pressure-\">\u6211\u5982\u4f55\u68c0\u67e5DEF\u538b\u529b\uff1f<\/h3>\n<p>\u6700\u51c6\u786e\u7684\u65b9\u6cd5\u662f\u5c06\u538b\u529b\u8868\u8fde\u63a5\u5230\u6cf5\u51fa\u53e3\u7ba1\u9053\u4e0a\u7684\u65bd\u62c9\u5fb7\u9600\u3002\u60a8\u8fd8\u53ef\u4ee5\u4f7f\u7528\u8bca\u65ad\u626b\u63cf\u5de5\u5177\u8bfb\u53d6\u538b\u529b\u4f20\u611f\u5668\u7535\u538b\uff0c\u5e76\u4f7f\u7528\u56fe\u8868\u5c06\u5176\u8f6c\u6362\u4e3a\u538b\u529b\u3002<\/p>\n<h3 id=\"can-a-bad-def-pump-cause-spn-4334-\">\u6545\u969c\u7684DEF\u6cf5\u4f1a\u5bfc\u81f4SPN 4334\u5417\uff1f<\/h3>\n<p>\u662f\u7684\uff0c\u5982\u679c\u6cf5\u6545\u969c\u6216\u65e0\u6cd5\u4ea7\u751f\u8db3\u591f\u7684\u538b\u529b\uff0c\u60a8\u5c06\u6536\u5230\u4f4e\u538b\u4ee3\u7801\u3002\u6cf5\u5e94\u81f3\u5c11\u80fd\u591f\u5728\u6700\u4f4e\u7535\u538b\u4e0b\u4ea7\u751f65 psi\uff08450 kPa\uff09\u7684\u538b\u529b\u3002\u6d4b\u8bd5\u6cf5\u7684\u538b\u529b\u8f93\u51fa\u548c\u7535\u6d41\uff0c\u4ee5\u9a8c\u8bc1\u5176\u662f\u5426\u6b63\u5e38\u5de5\u4f5c\u3002<\/p>\n<h3 id=\"what-are-the-signs-of-a-failing-def-pressure-sensor-\">\u6545\u969c\u7684DEF\u538b\u529b\u4f20\u611f\u5668\u7684\u8ff9\u8c61\u662f\u4ec0\u4e48\uff1f<\/h3>\n<p>\u5982\u679c\u4f20\u611f\u5668\u4e0e\u5b9e\u9645\u538b\u529b\u7684\u8bfb\u6570\u4e0d\u7b26\uff0c\u53ef\u80fd\u662f\u7f3a\u9677\u3002\u68c0\u67e5\u4f20\u611f\u5668\u4fe1\u53f7\u7535\u538b\u5e76\u4e0e\u5236\u9020\u5546\u89c4\u683c\u8fdb\u884c\u6bd4\u8f83\u3002\u540c\u65f6\uff0c\u68c0\u67e5\u7535\u7ebf\u548c\u8fde\u63a5\u5668\u662f\u5426\u6709\u635f\u574f\u6216\u8150\u8680\u3002<\/p>\n<h3 id=\"how-do-i-test-for-leaking-def-lines-\">\u6211\u5982\u4f55\u68c0\u6d4bDEF\u7ba1\u9053\u662f\u5426\u6cc4\u6f0f\uff1f<\/h3>\n<p>\u76ee\u89c6\u68c0\u67e5\u6240\u6709\u7ba1\u9053\u3001\u63a5\u5934\u548c\u8fde\u63a5\u5668\uff0c\u5bfb\u627e\u6f6e\u6e7f\u3001\u7ed3\u6676\u6216\u635f\u574f\u7684\u8ff9\u8c61\u3002\u4ece\u7f50\u4f53\u8ffd\u8e2a\u5230\u5242\u91cf\u9600\u7684\u7ba1\u7ebf\u3002\u6cc4\u6f0f\u901a\u5e38\u4f1a\u7559\u4e0b\u7ed3\u6676DEF\u7684\u53ef\u89c1\u767d\u8272\u6b8b\u7559\u7269\u3002\u60a8\u8fd8\u53ef\u4ee5\u52a0\u538b\u7cfb\u7edf\u5e76\u68c0\u67e5\u538b\u529b\u4e0b\u964d\uff0c\u4ee5\u6307\u793a\u6cc4\u6f0f\u3002<\/p>\n<h3 id=\"can-a-clogged-def-dosing-valve-cause-low-pressure-\">\u5835\u585e\u7684DEF\u5242\u91cf\u9600\u4f1a\u5bfc\u81f4\u4f4e\u538b\u529b\u5417\uff1f<\/h3>\n<p>\u662f\u7684\uff0c\u5982\u679c\u9600\u95e8\u88ab\u7ed3\u6676\u5316\u7684DEF\u7c98\u4f4f\uff0c\u5b83\u53ef\u80fd\u4f1a\u9020\u6210\u963b\u788d\u5e76\u964d\u4f4e\u538b\u529b\u3002\u62c6\u5378\u9600\u95e8\u5e76\u6839\u636e\u9700\u8981\u6e05\u6d01\u6216\u66f4\u6362\u3002\u907f\u514d\u4f7f\u7528\u81ea\u6765\u6c34\uff0c\u56e0\u4e3a\u5b83\u53ef\u80fd\u4f1a\u7559\u4e0b\u77ff\u7269\u6c89\u79ef\u7269\uff1b\u4f7f\u7528\u84b8\u998f\u6c34\u6216DEF\u6db2\u3002<\/p>\n<h3 id=\"what-happens-if-i-run-the-def-tank-empty-\">\u5982\u679c\u6211\u628aDEF\u7f50\u7528\u7a7a\u4e86\u4f1a\u53d1\u751f\u4ec0\u4e48\uff1f<\/h3>\n<p>\u5982\u679c\u6db2\u4f4d\u8fc7\u4f4e\uff0c\u53ef\u80fd\u4f1a\u5bfc\u81f4\u7a7a\u6c14\u8fdb\u5165\u7cfb\u7edf\uff0c\u4ece\u800c\u9020\u6210\u538b\u529b\u4e0b\u964d\u3002\u5982\u679c\u53d1\u52a8\u673a\u68c0\u6d4b\u5230\u7f50\u5185\u6db2\u4f53\u4e3a\u7a7a\uff0c\u5b83\u4e5f\u53ef\u80fd\u964d\u901f\uff0c\u4ee5\u9632\u6b62\u5bf9SCR\u7ec4\u4ef6\u9020\u6210\u635f\u5bb3\u3002\u4fdd\u6301\u7f50\u5185\u5145\u6ee1\u6db2\u4f53\uff0c\u5e76\u81f3\u5c11\u5728\u6bcf\u6b21\u52a0\u6cb9\u65f6\u8fdb\u884c\u8865\u5145\u3002<\/p>\n<h3 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