{"id":287909,"date":"2024-10-24T07:21:57","date_gmt":"2024-10-24T07:21:57","guid":{"rendered":"https:\/\/www.ziptuning.com\/zh\/?p=287909"},"modified":"2024-11-05T01:47:09","modified_gmt":"2024-11-05T01:47:09","slug":"p249d-closed-loop-reductant-injection-control-at-limit-flow-too-high","status":"publish","type":"post","link":"https:\/\/www.ziptuning.com\/zh\/blog\/p249d-closed-loop-reductant-injection-control-at-limit-flow-too-high\/","title":{"rendered":"P249D &#8211; \u95ed\u73af\u8fd8\u539f\u5242\u55b7\u5c04\u63a7\u5236\u8fbe\u5230\u6781\u9650 &#8211; \u6d41\u91cf\u8fc7\u9ad8"},"content":{"rendered":"<h2 id=\"understanding-p249d-closed-loop-reductant-injection-control-at-limit\">\u7406\u89e3P249D\uff1a\u95ed\u73af\u8fd8\u539f\u5242\u55b7\u5c04\u63a7\u5236\u8fbe\u5230\u6781\u9650<\/h2>\n<p>P249D \u662f\u4e00\u4e2a\u8bca\u65ad\u6545\u969c\u4ee3\u7801\uff08DTC\uff09\uff0c\u8868\u793a\u67f4\u6cb9\u6392\u6c14\u6db2\uff08DEF\uff09\u7cfb\u7edf\u5b58\u5728\u95ee\u9898\uff0c\u7279\u522b\u662f\u95ed\u73af\u8fd8\u539f\u5242\u55b7\u5c04\u63a7\u5236\u8fbe\u5230\u5176\u6781\u9650\uff0c\u6d41\u91cf\u8fc7\u9ad8\u3002\u6b64\u4ee3\u7801\u5e38\u89c1\u4e8e\u914d\u5907\u9009\u62e9\u6027\u50ac\u5316\u8fd8\u539f\uff08SCR\uff09\u7cfb\u7edf\u7684\u67f4\u6cb9\u8f66\u8f86\uff0cSCR \u7cfb\u7edf\u4f7f\u7528 DEF \u6765\u51cf\u5c11\u6c2e\u6c27\u5316\u7269\uff08NOx\uff09\u6392\u653e\u3002<\/p>\n<div class=\"workshop-experience-text\">\n<p>\u5728\u6211\u4eec\u7684\u8f66\u95f4\uff0c\u6211\u4eec\u7ecf\u5e38\u770b\u5230P249D\u4ee3\u7801\uff0c\u5c24\u5176\u662f\u5728\u914d\u5907\u9009\u62e9\u6027\u50ac\u5316\u8fd8\u539f\uff08SCR\uff09\u7cfb\u7edf\u7684\u6b27\u6d32\u67f4\u6cb9\u8f66\u4e0a\u3002\u5c31\u5728\u4e0a\u5468\uff0c\u6211\u4eec\u5904\u7406\u4e86\u4e00\u8f86\u5e26\u6709\u6b64\u4ee3\u7801\u7684\u6377\u8c79XE\uff0c\u5728\u8be6\u7ec6\u68c0\u67e5\u540e\uff0c\u6211\u4eec\u53d1\u73b0\u67f4\u6cb9\u6392\u6c14\u6db2\uff08DEF\uff09\u55b7\u5634\u56e0\u7ed3\u6676\u5316\u7684DEF\u800c\u5835\u585e\u3002\u6211\u4eec\u6e05\u9664\u4e86\u5835\u585e\uff0c\u4ee3\u7801\u4e00\u5ea6\u6e05\u9664\uff0c\u4f46\u51e0\u5929\u540e\u53c8\u56de\u6765\u4e86\u3002\u6700\u7ec8\u6211\u4eec\u53d1\u73b0\uff0cDEF\u7bb1\u5185\u7684DEF\u8d28\u91cf\u4f20\u611f\u5668\u4e5f\u51fa\u73b0\u4e86\u6545\u969c\uff0c\u5bfc\u81f4\u7cfb\u7edf\u9519\u8bef\u68c0\u6d4bDEF\u8d28\u91cf\u5dee\u3002\u66f4\u6362\u4f20\u611f\u5668\u540e\uff0c\u4ee3\u7801\u6ca1\u6709\u518d\u51fa\u73b0\u3002\u4ece\u6211\u4eec\u7684\u7ecf\u9a8c\u6765\u770b\uff0c\u6b27\u6d32\u67f4\u6cb9\u8f66\u4e0a\u7684P249D\u4ee3\u7801\u901a\u5e38\u662f\u7531DEF\u55b7\u5634\u95ee\u9898\u3001DEF\u8d28\u91cf\u4f20\u611f\u5668\u6545\u969c\u6216DEF\u6db2\u4f4d\u8fc7\u4f4e\u5f15\u8d77\u7684\u3002\u53ca\u65f6\u8bca\u65ad\u5e76\u89e3\u51b3\u6839\u672c\u95ee\u9898\u5bf9\u4e8e\u9632\u6b62SCR\u7cfb\u7edf\u7684\u8fdb\u4e00\u6b65\u635f\u574f\u81f3\u5173\u91cd\u8981\u3002<\/p>\n<\/div>\n<h2 id=\"urgency-and-driving-considerations\">\u7d27\u6025\u7a0b\u5ea6\u53ca\u9a7e\u9a76\u6ce8\u610f\u4e8b\u9879<\/h2>\n<p>\u5f53\u51fa\u73b0P249D\u4ee3\u7801\u65f6\uff0c\u901a\u5e38\u4e0d\u9700\u8981\u7acb\u5373\u505c\u8f66\u3002\u5728\u5927\u591a\u6570\u60c5\u51b5\u4e0b\uff0c\u60a8\u53ef\u4ee5\u7ee7\u7eed\u77ed\u65f6\u95f4\u9a7e\u9a76\u8f66\u8f86\u3002\u7136\u800c\uff0c\u53ca\u65f6\u89e3\u51b3\u6b64\u95ee\u9898\u5bf9\u4e8e\u9632\u6b62SCR\u7cfb\u7edf\u8fdb\u4e00\u6b65\u635f\u574f\u548c\u907f\u514d\u53d1\u52a8\u673a\u964d\u529f\u7387\u6a21\u5f0f\uff08\u8ddb\u884c\u6a21\u5f0f\uff09\u81f3\u5173\u91cd\u8981\u3002<\/p>\n<p>\u5982\u679cDEF\u8b66\u544a\u706f\u4eae\u8d77\u6216\u8f66\u8f86\u8fdb\u5165\u529f\u7387\u53d7\u9650\u6a21\u5f0f\uff0c\u5efa\u8bae\u5c3d\u5feb\u5bfb\u6c42\u4e13\u4e1a\u6280\u5e08\u6216\u7ecf\u9500\u5546\u7684\u5e2e\u52a9\u3002<\/p>\n<h2 id=\"code-specificity-and-affected-parts\">\u4ee3\u7801\u8be6\u7ec6\u4fe1\u606f\u53ca\u53d7\u5f71\u54cd\u7684\u90e8\u4ef6<\/h2>\n<p>P249D \u662f\u4e00\u4e2a\u901a\u7528\u52a8\u529b\u7cfb\u7edf\u4ee3\u7801\uff0c\u9002\u7528\u4e8e\u914d\u5907SCR\u7cfb\u7edf\u7684\u591a\u79cd\u67f4\u6cb9\u8f66\u8f86\u3002\u6d89\u53ca\u6b64\u95ee\u9898\u7684\u4e3b\u8981\u90e8\u4ef6\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>DEF\u55b7\u5634\uff1a\u8d1f\u8d23\u5c06DEF\u55b7\u5c04\u5230\u6392\u6c14\u6d41\u4e2d<\/li>\n<li>DEF\u6cf5\uff1a\u4e3a\u55b7\u5634\u63d0\u4f9b\u52a0\u538b\u7684DEF<\/li>\n<li>DEF\u7bb1\u548c\u4f20\u611f\u5668\uff1a\u50a8\u5b58DEF\u5e76\u76d1\u63a7\u6db2\u4f4d\u548c\u8d28\u91cf<\/li>\n<li>SCR\u50ac\u5316\u5668\uff1a\u4f7f\u7528DEF\u5c06NOx\u8f6c\u5316\u4e3a\u65e0\u5bb3\u7684\u6c2e\u6c14\u548c\u6c34<\/li>\n<li>NOx\u4f20\u611f\u5668\uff1a\u6d4b\u91cfSCR\u50ac\u5316\u5668\u524d\u540e\u7684NOx\u6c34\u5e73<\/li>\n<\/ul>\n<h2 id=\"common-causes-and-diagnostics\">\u5e38\u89c1\u539f\u56e0\u53ca\u8bca\u65ad<\/h2>\n<p>\u89e6\u53d1P249D\u4ee3\u7801\u7684\u56e0\u7d20\u5305\u62ec\uff1a<\/p>\n<ol>\n<li>DEF\u55b7\u5634\u7ed3\u6676\u5835\u585e\u6216\u6545\u969c<\/li>\n<li>DEF\u6db2\u4f4d\u8fc7\u4f4e\u6216\u8d28\u91cf\u5dee<\/li>\n<li>DEF\u6cf5\u6216\u538b\u529b\u4f20\u611f\u5668\u6545\u969c<\/li>\n<li>DEF\u7cfb\u7edf\u4e2d\u6709\u6cc4\u6f0f\uff0c\u4f8b\u5982\u8f6f\u7ba1\u6216\u8fde\u63a5\u4ef6<\/li>\n<li>NOx\u4f20\u611f\u5668\u6545\u969c\uff0c\u63d0\u4f9b\u4e0d\u6b63\u786e\u7684\u8bfb\u6570<\/li>\n<\/ol>\n<p>\u8bca\u65ad\u6b65\u9aa4\u5982\u4e0b\uff1a<\/p>\n<ol>\n<li>\u68c0\u67e5DEF\u6db2\u4f4d\u548c\u8d28\u91cf\uff0c\u5fc5\u8981\u65f6\u8865\u5145\u65b0\u6db2\u4f53<\/li>\n<li>\u68c0\u67e5DEF\u55b7\u5634\u662f\u5426\u7ed3\u6676\u6216\u5835\u585e\uff0c\u6e05\u6d01\u6216\u66f4\u6362<\/li>\n<li>\u6d4b\u8bd5DEF\u6cf5\u548c\u538b\u529b\u4f20\u611f\u5668\u7684\u6b63\u5e38\u8fd0\u884c<\/li>\n<li>\u68c0\u67e5DEF\u7cfb\u7edf\u662f\u5426\u6709\u6cc4\u6f0f\uff0c\u4fee\u590d\u635f\u574f\u7684\u90e8\u4ef6<\/li>\n<li>\u8bc4\u4f30NOx\u4f20\u611f\u5668\u548cSCR\u50ac\u5316\u5668\u7684\u529f\u80fd\u662f\u5426\u6b63\u5e38<\/li>\n<\/ol>\n<h2 id=\"solutions-and-prevention\">\u89e3\u51b3\u65b9\u6848\u53ca\u9884\u9632<\/h2>\n<p>\u6839\u636e\u6839\u672c\u539f\u56e0\uff0c\u89e3\u51b3\u65b9\u6848\u53ef\u80fd\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>\u6e05\u6d01\u6216\u66f4\u6362DEF\u55b7\u5634<\/li>\n<li>\u8865\u5145\u9ad8\u8d28\u91cf\u7684DEF\u6db2\u4f53<\/li>\n<li>\u66f4\u6362DEF\u6cf5\u3001\u538b\u529b\u4f20\u611f\u5668\u6216\u5176\u4ed6\u6545\u969c\u90e8\u4ef6<\/li>\n<li>\u4fee\u590dDEF\u7cfb\u7edf\u4e2d\u7684\u6cc4\u6f0f<\/li>\n<li>\u66f4\u6362NOx\u4f20\u611f\u5668\u6216\u635f\u574f\u7684SCR\u50ac\u5316\u5668<\/li>\n<\/ul>\n<p>\u9884\u9632P249D\u95ee\u9898\uff0c\u9075\u5faa\u4ee5\u4e0b\u5efa\u8bae\uff1a<\/p>\n<ul>\n<li>\u4fdd\u6301\u9002\u5f53\u7684DEF\u6db2\u4f4d\uff0c\u5e76\u4ec5\u4f7f\u7528\u9ad8\u8d28\u91cf\u7684\u3001\u7ecf\u8fc7OEM\u8ba4\u8bc1\u7684\u6db2\u4f53<\/li>\n<li>\u5b9a\u671f\u68c0\u67e5DEF\u7cfb\u7edf\u662f\u5426\u6709\u6cc4\u6f0f\u6216\u635f\u574f<\/li>\n<li>\u6309\u7167\u5236\u9020\u5546\u7684\u7ef4\u62a4\u65f6\u95f4\u8868\u5bf9SCR\u7cfb\u7edf\u90e8\u4ef6\u8fdb\u884c\u4fdd\u517b<\/li>\n<\/ul>\n<h2 id=\"repair-costs\">\u7ef4\u4fee\u6210\u672c<\/h2>\n<p>\u7ef4\u4feeP249D\u95ee\u9898\u7684\u8d39\u7528\u6839\u636e\u5177\u4f53\u539f\u56e0\u548c\u8f66\u8f86\u578b\u53f7\u800c\u6709\u6240\u4e0d\u540c\u3002\u5e38\u89c1\u90e8\u4ef6\u8d39\u7528\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>DEF\u55b7\u5634\uff1a95\u7f8e\u5143\u81f3150\u6b27\u5143\uff08100\u7f8e\u5143\u81f3160\u6b27\u5143\uff09<\/li>\n<li>DEF\u6cf5\uff1a500\u7f8e\u5143\u81f3800\u6b27\u5143\uff08530\u7f8e\u5143\u81f3850\u6b27\u5143\uff09<\/li>\n<li>NOx\u4f20\u611f\u5668\uff1a300\u7f8e\u5143\u81f3500\u6b27\u5143\uff08320\u7f8e\u5143\u81f3530\u6b27\u5143\uff09<\/li>\n<\/ul>\n<p>\u4eba\u5de5\u8d39\u7528\u901a\u5e38\u4e3a\u6bcf\u5c0f\u65f6100\u7f8e\u5143\u81f3150\u6b27\u5143\uff08106\u7f8e\u5143\u81f3160\u6b27\u5143\uff09\uff0c\u603b\u7ef4\u4fee\u8d39\u7528\u53ef\u80fd\u8fbe\u52301000\u7f8e\u5143\u81f31500\u6b27\u5143\uff081060\u7f8e\u5143\u81f31590\u6b27\u5143\uff09\u6216\u66f4\u591a\uff0c\u89c6\u95ee\u9898\u7684\u590d\u6742\u7a0b\u5ea6\u800c\u5b9a\u3002<\/p>\n<h2 id=\"related-issues-and-fault-codes\">\u76f8\u5173\u95ee\u9898\u53ca\u6545\u969c\u4ee3\u7801<\/h2>\n<p>\u5176\u4ed6\u53ef\u80fd\u4e0eP249D\u4e00\u8d77\u51fa\u73b0\u7684\u6545\u969c\u4ee3\u7801\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>P20EE\uff1aSCR NOx\u50ac\u5316\u5242\u6548\u7387\u4f4e\u4e8e\u9608\u503c<\/li>\n<li>P2BAE\uff1aDEF\u55b7\u5634\u6027\u80fd<\/li>\n<li><a href=\"https:\/\/www.ziptuning.com\/zh\/blog\/p20e8-scr-nox-catalyst-efficiency-below-threshold\/\" title=\"P20E8\uff1a\u8fd8\u539f\u5242\u538b\u529b\u8fc7\u4f4e\">P20E8\uff1a\u8fd8\u539f\u5242\u538b\u529b\u8fc7\u4f4e<\/a><\/li>\n<li><a href=\"https:\/\/www.ziptuning.com\/zh\/blog\/p20e9-scr-nox-catalyst-conversion-efficiency-warning\/\" title=\"P20E9\uff1a\u8fd8\u539f\u5242\u538b\u529b\u8fc7\u9ad8\">P20E9\uff1a\u8fd8\u539f\u5242\u538b\u529b\u8fc7\u9ad8<\/a><\/li>\n<\/ul>\n<p>\u6b64\u5916\uff0cEGR\u7cfb\u7edf\u3001\u6da1\u8f6e\u589e\u538b\u5668\u6216\u71c3\u6cb9\u55b7\u5c04\u5668\u7684\u95ee\u9898\u4e5f\u53ef\u80fd\u52a0\u5267SCR\u7cfb\u7edf\u95ee\u9898\uff0c\u5e76\u5bfc\u81f4\u51fa\u73b0P249D\u4ee3\u7801\u3002<\/p>\n<p>\u901a\u8fc7\u4e86\u89e3P249D\u4ee3\u7801\u53ca\u5176\u539f\u56e0\uff0c\u6b63\u786e\u7684\u8bca\u65ad\u548c\u7ef4\u4fee\u6b65\u9aa4\uff0c\u8f66\u4e3b\u548c\u6280\u5e08\u53ef\u4ee5\u6709\u6548\u89e3\u51b3\u8be5\u95ee\u9898\uff0c\u4fdd\u6301SCR\u7cfb\u7edf\u7684\u6548\u7387\uff0c\u786e\u4fdd\u6700\u4f73\u6027\u80fd\u548c\u6392\u653e\u5408\u89c4\u6027\u3002<\/p>\n<h2 id=\"frequently-asked-questions-about-p249d\">\u5173\u4e8eP249D\u7684\u5e38\u89c1\u95ee\u9898<\/h2>\n<h3 id=\"1-what-does-the-obd-ii-code-p249d-mean-\">P249D\u4ee3\u7801\u662f\u4ec0\u4e48\u610f\u601d\uff1f<\/h3>\n<p>P249D \u662f\u4e00\u4e2a\u8bca\u65ad\u6545\u969c\u4ee3\u7801\uff08DTC\uff09\uff0c\u8868\u793a\u201c\u95ed\u73af\u8fd8\u539f\u5242\u55b7\u5c04\u63a7\u5236\u8fbe\u5230\u6781\u9650 &#8211; \u6d41\u91cf\u8fc7\u9ad8\u201d\u3002\u6b64\u4ee3\u7801\u8868\u793a\u67f4\u6cb9\u6392\u6c14\u6db2\uff08DEF\uff09\u7cfb\u7edf\u5b58\u5728\u95ee\u9898\uff0c\u7279\u522b\u662f\u95ed\u73af\u8fd8\u539f\u5242\u55b7\u5c04\u63a7\u5236\u56e0\u6d41\u91cf\u8fc7\u9ad8\u800c\u8fbe\u5230\u6781\u9650\u3002<\/p>\n<h3 id=\"2-what-are-the-common-causes-of-code-p249d-\">\u5bfc\u81f4P249D\u4ee3\u7801\u7684\u5e38\u89c1\u539f\u56e0\u662f\u4ec0\u4e48\uff1f<\/h3>\n<p>P249D\u7684\u5e38\u89c1\u539f\u56e0\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>DEF\u55b7\u5634\u56e0\u7ed3\u6676\u5835\u585e\u6216\u6545\u969c<\/li>\n<li>DEF\u6db2\u4f4d\u8fc7\u4f4e\u6216\u8d28\u91cf\u5dee<\/li>\n<li>DEF\u6cf5\u6216\u538b\u529b\u4f20\u611f\u5668\u6545\u969c<\/li>\n<li>DEF\u7cfb\u7edf\u4e2d\u6709\u6cc4\u6f0f\uff0c\u4f8b\u5982\u8f6f\u7ba1\u6216\u8fde\u63a5\u4ef6<\/li>\n<li>NOx\u4f20\u611f\u5668\u6545\u969c\uff0c\u63d0\u4f9b\u4e0d\u6b63\u786e\u7684\u8bfb\u6570<\/li>\n<\/ul>\n<h3 id=\"3-what-are-the-symptoms-of-code-p249d-\">P249D\u4ee3\u7801\u7684\u75c7\u72b6\u662f\u4ec0\u4e48\uff1f<\/h3>\n<p>P249D\u7684\u75c7\u72b6\u53ef\u80fd\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>\u53d1\u52a8\u673a\u68c0\u67e5\u706f\u4eae\u8d77<\/li>\n<li>\u53d1\u52a8\u673a\u529f\u7387\u4e0b\u964d\u6216\u8fdb\u5165\u8ddb\u884c\u6a21\u5f0f<\/li>\n<li>\u71c3\u6cb9\u6d88\u8017\u589e\u52a0<\/li>\n<li>\u542f\u52a8\u56f0\u96be<\/li>\n<li>\u53d1\u52a8\u673a\u8fd0\u884c\u4e0d\u7a33\u6216\u5931\u706b<\/li>\n<\/ul>\n<h3 id=\"4-is-it-safe-to-drive-with-code-p249d-\">\u5e26\u6709P249D\u4ee3\u7801\u7684\u8f66\u8f86\u8fd8\u80fd\u5b89\u5168\u9a7e\u9a76\u5417\uff1f<\/h3>\n<p>\u867d\u7136P249D\u901a\u5e38\u4e0d\u9700\u8981\u7acb\u5373\u505c\u8f66\uff0c\u4f46\u5fc5\u987b\u53ca\u65f6\u89e3\u51b3\u8be5\u95ee\u9898\uff0c\u4ee5\u9632\u6b62SCR\u7cfb\u7edf\u8fdb\u4e00\u6b65\u635f\u574f\u5e76\u907f\u514d\u53d1\u52a8\u673a\u964d\u529f\u7387\u6a21\u5f0f\u3002\u5982\u679cDEF\u8b66\u544a\u706f\u4eae\u8d77\u6216\u8f66\u8f86\u8fdb\u5165\u529f\u7387\u53d7\u9650\u6a21\u5f0f\uff0c\u8bf7\u5c3d\u5feb\u5bfb\u6c42\u4e13\u4e1a\u5e2e\u52a9\u3002<\/p>\n<h3 id=\"5-how-do-you-diagnose-code-p249d-\">\u5982\u4f55\u8bca\u65adP249D\u4ee3\u7801\uff1f<\/h3>\n<p>\u8bca\u65adP249D\u4ee3\u7801\u7684\u6b65\u9aa4\u5982\u4e0b\uff1a<\/p>\n<ol>\n<li>\u68c0\u67e5DEF\u6db2\u4f4d\u548c\u8d28\u91cf\uff0c\u5fc5\u8981\u65f6\u8865\u5145\u65b0\u6db2\u4f53<\/li>\n<li>\u68c0\u67e5DEF\u55b7\u5634\u662f\u5426\u7ed3\u6676\u6216\u5835\u585e\uff0c\u6e05\u6d01\u6216\u66f4\u6362<\/li>\n<li>\u6d4b\u8bd5DEF\u6cf5\u548c\u538b\u529b\u4f20\u611f\u5668\u7684\u6b63\u5e38\u8fd0\u884c<\/li>\n<li>\u68c0\u67e5DEF\u7cfb\u7edf\u662f\u5426\u6709\u6cc4\u6f0f\uff0c\u4fee\u590d\u635f\u574f\u7684\u90e8\u4ef6<\/li>\n<li>\u8bc4\u4f30NOx\u4f20\u611f\u5668\u548cSCR\u50ac\u5316\u5668\u7684\u529f\u80fd\u662f\u5426\u6b63\u5e38<\/li>\n<\/ol>\n<h3 id=\"6-can-low-def-fluid-cause-code-p249d-\">DEF\u6db2\u4f4d\u4f4e\u4f1a\u5bfc\u81f4P249D\u4ee3\u7801\u5417\uff1f<\/h3>\n<p>\u662f\u7684\uff0cDEF\u6db2\u4f4d\u4f4e\u6216\u8d28\u91cf\u5dee\u53ef\u80fd\u4f1a\u89e6\u53d1P249D\u4ee3\u7801\u3002\u8bf7\u59cb\u7ec8\u4fdd\u6301\u9002\u5f53\u7684DEF\u6db2\u4f4d\uff0c\u5e76\u4f7f\u7528\u9ad8\u8d28\u91cf\u7684OEM\u8ba4\u8bc1\u6db2\u4f53\u3002<\/p>\n<h3 id=\"7-how-often-should-the-def-filter-be-replaced-\">DEF\u6ee4\u6e05\u5668\u5e94\u591a\u4e45\u66f4\u6362\u4e00\u6b21\uff1f<\/h3>\n<p>DEF\u6ee4\u6e05\u5668\u5e94\u6839\u636e\u5236\u9020\u5546\u63a8\u8350\u7684\u7ef4\u62a4\u65f6\u95f4\u8868\u8fdb\u884c\u66f4\u6362\uff0c\u901a\u5e38\u4e3a\u6bcf10\u4e07\u81f315\u4e07\u82f1\u91cc\u62167500\u5c0f\u65f6\u8fd0\u884c\u3002<\/p>\n<h3 id=\"8-can-a-faulty-def-injector-cause-code-p249d-\">DEF\u55b7\u5634\u6545\u969c\u4f1a\u5bfc\u81f4P249D\u4ee3\u7801\u5417\uff1f<\/h3>\n<p>\u662f\u7684\uff0cDEF\u55b7\u5634\u56e0\u7ed3\u6676\u5316\u5835\u585e\u6216\u6545\u969c\u53ef\u80fd\u5bfc\u81f4DEF\u6d41\u91cf\u4e0d\u8db3\uff0c\u4ece\u800c\u89e6\u53d1P249D\u4ee3\u7801\u3002\u53ef\u80fd\u9700\u8981\u68c0\u67e5\u3001\u6e05\u6d01\u6216\u66f4\u6362\u55b7\u5634\u3002<\/p>\n<h3 id=\"9-what-should-i-do-if-my-vehicle-has-code-p249d-\">\u5982\u679c\u6211\u7684\u8f66\u8f86\u51fa\u73b0P249D\u4ee3\u7801\uff0c\u6211\u5e94\u8be5\u600e\u4e48\u505a\uff1f<\/h3>\n<p>\u5982\u679c\u60a8\u7684\u8f66\u8f86\u663e\u793aP249D\u4ee3\u7801\uff0c\u8bf7\u53ca\u65f6\u8bca\u65ad\u95ee\u9898\uff0c\u4ee5\u9632\u6b62\u8fdb\u4e00\u6b65\u635f\u574f\u3002\u68c0\u67e5DEF\u6db2\u4f4d\uff0c\u68c0\u67e5DEF\u7cfb\u7edf\u662f\u5426\u6709\u6cc4\u6f0f\u6216\u5835\u585e\uff0c\u5e76\u6d4b\u8bd5DEF\u55b7\u5634\u3001\u6cf5\u548c\u4f20\u611f\u5668\u3002\u5fc5\u8981\u65f6\u4fee\u590d\u6216\u66f4\u6362\u6545\u969c\u90e8\u4ef6\u3002<\/p>\n<h3 id=\"10-how-much-does-it-cost-to-repair-code-p249d-\">\u4fee\u590dP249D\u4ee3\u7801\u7684\u8d39\u7528\u662f\u591a\u5c11\uff1f<\/h3>\n<p>\u4fee\u590dP249D\u7684\u8d39\u7528\u56e0\u6839\u672c\u539f\u56e0\u548c\u8f66\u8f86\u578b\u53f7\u800c\u5f02\u3002\u5e38\u89c1\u90e8\u4ef6\u8d39\u7528\u8303\u56f4\u4e3a95\u7f8e\u5143\u81f3800\u7f8e\u5143\uff0c\u4eba\u5de5\u8d39\u7528\u4e3a\u6bcf\u5c0f\u65f6100\u7f8e\u5143\u81f3150\u6b27\u5143\u3002\u603b\u7ef4\u4fee\u8d39\u7528\u53ef\u80fd\u8fbe\u52301000\u7f8e\u5143\u81f31500\u6b27\u5143\u6216\u66f4\u591a\uff0c\u89c6\u95ee\u9898\u590d\u6742\u6027\u800c\u5b9a\u3002<\/p>\n<h3 id=\"11-can-a-malfunctioning-egr-system-cause-code-p249d-\">EGR\u7cfb\u7edf\u6545\u969c\u4f1a\u5bfc\u81f4P249D\u4ee3\u7801\u5417\uff1f<\/h3>\n<p>\u867d\u7136EGR\u7cfb\u7edf\u95ee\u9898\u4e0d\u4f1a\u76f4\u63a5\u5bfc\u81f4P249D\u4ee3\u7801\uff0c\u4f46\u5b83\u53ef\u80fd\u4f1a\u52a0\u5267SCR\u7cfb\u7edf\u95ee\u9898\uff0c\u5bfc\u81f4P249D\u4ee3\u7801\u51fa\u73b0\u3002\u5efa\u8bae\u91c7\u7528\u5168\u9762\u7684\u8bca\u65ad\u65b9\u6cd5\u3002<\/p>\n<h3 id=\"12-how-can-i-prevent-code-p249d-from-reoccurring-\">\u5982\u4f55\u9632\u6b62P249D\u4ee3\u7801\u518d\u6b21\u51fa\u73b0\uff1f<\/h3>\n<p>\u4e3a\u4e86\u9632\u6b62P249D\u4ee3\u7801\u518d\u6b21\u51fa\u73b0\uff1a<\/p>\n<ul>\n<li>\u4fdd\u6301\u9002\u5f53\u7684DEF\u6db2\u4f4d\uff0c\u5e76\u4ec5\u4f7f\u7528\u9ad8\u8d28\u91cf\u3001OEM\u8ba4\u8bc1\u7684\u6db2\u4f53<\/li>\n<li>\u5b9a\u671f\u68c0\u67e5DEF\u7cfb\u7edf\u662f\u5426\u6709\u6cc4\u6f0f\u6216\u635f\u574f<\/li>\n<li>\u6309\u7167\u5236\u9020\u5546\u7684\u7ef4\u62a4\u65f6\u95f4\u8868\u5bf9SCR\u7cfb\u7edf\u90e8\u4ef6\u8fdb\u884c\u4fdd\u517b<\/li>\n<\/ul>\n<h3 id=\"13-what-is-the-role-of-the-scr-catalyst-in-relation-to-code-p249d-\">SCR\u50ac\u5316\u5668\u4e0eP249D\u4ee3\u7801\u6709\u4ec0\u4e48\u5173\u7cfb\uff1f<\/h3>\n<p>SCR\u50ac\u5316\u5668\u4f7f\u7528DEF\u5c06NOx\u8f6c\u5316\u4e3a\u65e0\u5bb3\u7684\u6c2e\u6c14\u548c\u6c34\u3002SCR\u50ac\u5316\u5668\u6076\u5316\u6216\u6545\u969c\u53ef\u80fd\u5bfc\u81f4NOx\u6392\u653e\u589e\u52a0\uff0c\u5e76\u53ef\u80fd\u89e6\u53d1P249D\u4ee3\u7801\u3002<\/p>\n<h3 id=\"14-can-code-p249d-cause-damage-to-other-engine-components-\">P249D\u4ee3\u7801\u4f1a\u5bf9\u5176\u4ed6\u53d1\u52a8\u673a\u90e8\u4ef6\u9020\u6210\u635f\u574f\u5417\uff1f<\/h3>\n<p>\u5982\u679c\u4e0d\u53ca\u65f6\u89e3\u51b3\uff0cP249D\u4ee3\u7801\u53ef\u80fd\u5bfc\u81f4NOx\u6392\u653e\u589e\u52a0\u3001\u71c3\u6cb9\u6548\u7387\u4e0b\u964d\uff0c\u5e76\u53ef\u80fd\u635f\u574fSCR\u7cfb\u7edf\u53ca\u5176\u4ed6\u53d1\u52a8\u673a\u90e8\u4ef6\u3002\u53ca\u65f6\u8bca\u65ad\u548c\u7ef4\u4fee\u81f3\u5173\u91cd\u8981\u3002<\/p>\n<h3 id=\"15-how-does-the-def-pump-relate-to-code-p249d-\">DEF\u6cf5\u4e0eP249D\u4ee3\u7801\u6709\u4ec0\u4e48\u5173\u7cfb\uff1f<\/h3>\n<p>DEF\u6cf5\u4e3a\u55b7\u5634\u63d0\u4f9b\u52a0\u538b\u7684DEF\u3002DEF\u6cf5\u6216\u538b\u529b\u4f20\u611f\u5668\u6545\u969c\u53ef\u80fd\u5bfc\u81f4DEF\u6d41\u91cf\u4e0d\u8db3\uff0c\u4ece\u800c\u89e6\u53d1P249D\u4ee3\u7801\u3002<\/p>\n<h3 id=\"16-what-should-i-do-if-code-p249d-returns-after-repairs-\">\u5982\u679c\u4fee\u7406\u540eP249D\u4ee3\u7801\u518d\u6b21\u51fa\u73b0\uff0c\u6211\u8be5\u600e\u4e48\u529e\uff1f<\/h3>\n<p>\u5982\u679c\u4fee\u7406\u540eP249D\u4ee3\u7801\u518d\u6b21\u51fa\u73b0\uff0c\u8bf7\u91cd\u65b0\u68c0\u67e5DEF\u7cfb\u7edf\u4e2d\u7684\u6240\u6709\u90e8\u4ef6\u548c\u8fde\u63a5\uff0c\u786e\u4fdd\u66f4\u6362\u7684\u90e8\u4ef6\u5b89\u88c5\u6b63\u786e\u5e76\u6b63\u5e38\u8fd0\u884c\u3002\u5982\u679c\u95ee\u9898\u4ecd\u7136\u5b58\u5728\uff0c\u5efa\u8bae\u5bfb\u6c42\u4e13\u4e1a\u7684\u8bca\u65ad\u5e2e\u52a9\u3002<\/p>\n<h3 id=\"17-can-using-aftermarket-def-cause-code-p249d-\">\u4f7f\u7528\u975eOEM DEF\u4f1a\u5bfc\u81f4P249D\u4ee3\u7801\u5417\uff1f<\/h3>\n<p>\u4f7f\u7528\u975eOEM\u6216\u4f4e\u8d28\u91cf\u7684DEF\u53ef\u80fd\u5bfc\u81f4\u7ed3\u6676\u3001\u5835\u585e\u548c\u4f20\u611f\u5668\u95ee\u9898\uff0c\u53ef\u80fd\u89e6\u53d1P249D\u4ee3\u7801\u3002\u8bf7\u59cb\u7ec8\u4f7f\u7528\u9ad8\u8d28\u91cf\u3001OEM\u8ba4\u8bc1\u7684DEF\uff0c\u4ee5\u786e\u4fdd\u7cfb\u7edf\u6b63\u5e38\u8fd0\u884c\u3002<\/p>\n<h3 id=\"18-how-often-should-i-check-my-def-level-to-prevent-code-p249d-\">\u6211\u5e94\u8be5\u591a\u4e45\u68c0\u67e5\u4e00\u6b21DEF\u6db2\u4f4d\u4ee5\u9632\u6b62P249D\u4ee3\u7801\uff1f<\/h3>\n<p>\u5b9a\u671f\u68c0\u67e5DEF\u6db2\u4f4d\uff0c\u81f3\u5c11\u6bcf\u6b21\u52a0\u6cb9\u65f6\u68c0\u67e5\u3002\u5927\u591a\u6570\u8f66\u8f86\u4f1a\u5728DEF\u6db2\u4f4d\u4f4e\u65f6\u63d0\u9192\u9a7e\u9a76\u5458\uff0c\u4f46\u4e3b\u52a8\u76d1\u6d4b\u53ef\u4ee5\u5e2e\u52a9\u9632\u6b62P249D\u7b49\u95ee\u9898\u3002<\/p>\n<h3 id=\"19-can-extreme-temperatures-affect-the-occurrence-of-code-p249d-\">\u6781\u7aef\u6e29\u5ea6\u4f1a\u5f71\u54cdP249D\u4ee3\u7801\u7684\u51fa\u73b0\u5417\uff1f<\/h3>\n<p>\u6781\u7aef\u5bd2\u51b7\u7684\u6e29\u5ea6\u53ef\u80fd\u5bfc\u81f4DEF\u51bb\u7ed3\uff0c\u4ece\u800c\u5bfc\u81f4\u5835\u585e\u548c\u6d41\u91cf\u95ee\u9898\u3002\u76f8\u53cd\uff0c\u9ad8\u6e29\u53ef\u80fd\u4f1a\u964d\u4f4eDEF\u8d28\u91cf\u3002\u6240\u6709\u6761\u4ef6\u4e0b\u7684\u9002\u5f53\u50a8\u5b58\u548c\u7ef4\u62a4\u81f3\u5173\u91cd\u8981\u3002<\/p>\n<h3 id=\"20-what-other-codes-may-appear-alongside-p249d-\">\u4e0eP249D\u4ee3\u7801\u4e00\u8d77\u53ef\u80fd\u51fa\u73b0\u7684\u5176\u4ed6\u4ee3\u7801\u6709\u54ea\u4e9b\uff1f<\/h3>\n<p>\u4e0eP249D\u4e00\u8d77\u53ef\u80fd\u51fa\u73b0\u7684\u76f8\u5173\u4ee3\u7801\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>P20EE\uff1aSCR NOx\u50ac\u5316\u5242\u6548\u7387\u4f4e\u4e8e\u9608\u503c<\/li>\n<li>P2BAE\uff1aDEF\u55b7\u5634\u6027\u80fd<\/li>\n<li><a href=\"https:\/\/www.ziptuning.com\/zh\/blog\/p20e8-scr-nox-catalyst-efficiency-below-threshold\/\" title=\"P20E8\uff1a\u8fd8\u539f\u5242\u538b\u529b\u8fc7\u4f4e\">P20E8\uff1a\u8fd8\u539f\u5242\u538b\u529b\u8fc7\u4f4e<\/a><\/li>\n<li><a href=\"https:\/\/www.ziptuning.com\/zh\/blog\/p20e9-scr-nox-catalyst-conversion-efficiency-warning\/\" title=\"P20E9\uff1a\u8fd8\u539f\u5242\u538b\u529b\u8fc7\u9ad8\">P20E9\uff1a\u8fd8\u539f\u5242\u538b\u529b\u8fc7\u9ad8<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u7406\u89e3P249D\uff1a\u95ed\u73af\u8fd8\u539f\u5242\u55b7\u5c04\u63a7\u5236\u8fbe\u5230\u6781\u9650 P249D 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