{"id":287626,"date":"2024-10-23T05:29:07","date_gmt":"2024-10-23T05:29:07","guid":{"rendered":"https:\/\/www.ziptuning.com\/zh\/?p=287626"},"modified":"2024-11-04T09:08:39","modified_gmt":"2024-11-04T09:08:39","slug":"p2049-reductant-injector-circuit-high","status":"publish","type":"post","link":"https:\/\/www.ziptuning.com\/zh\/blog\/p2049-reductant-injector-circuit-high\/","title":{"rendered":"P2049 &#8211; \u8fd8\u539f\u5242\u55b7\u5c04\u5668\u7535\u8def\u7535\u538b\u8fc7\u9ad8"},"content":{"rendered":"<h2 id=\"what-is-code-p2049-and-how-urgent-is-it-\">\u4ec0\u4e48\u662fP2049\u6545\u969c\u7801\uff1f\u7d27\u6025\u7a0b\u5ea6\u5982\u4f55\uff1f<\/h2>\n<p>\u8bca\u65ad\u6545\u969c\u7801\uff08DTC\uff09P2049\u662f\u4e00\u4e2a\u901a\u7528\u7684\u52a8\u529b\u603b\u6210\u6545\u969c\u7801\uff0c\u8868\u793a\u52a8\u529b\u603b\u6210\u63a7\u5236\u6a21\u5757\uff08PCM\uff09\u68c0\u6d4b\u5230\u5728\u7b2c1\u6392\u3001\u7b2c1\u5355\u5143\u7684\u8fd8\u539f\u5242\u55b7\u5c04\u9600\u63a7\u5236\u7535\u8def\u4e2d\u5b58\u5728\u8fc7\u9ad8\u7535\u538b\u3002\u8be5\u6545\u969c\u7801\u88ab\u8ba4\u4e3a\u662f\u4e25\u91cd\u95ee\u9898\uff0c\u5e94\u8be5\u5c3d\u5feb\u89e3\u51b3\uff0c\u56e0\u4e3a\u5b83\u53ef\u80fd\u4f1a\u7981\u7528\u9009\u62e9\u6027\u50ac\u5316\u8fd8\u539f\uff08SCR\uff09\u7cfb\u7edf\uff0c\u5e76\u53ef\u80fd\u5728\u672a\u53ca\u65f6\u4fee\u590d\u7684\u60c5\u51b5\u4e0b\u5bfc\u81f4\u50ac\u5316\u5668\u635f\u574f\u3002\u5efa\u8bae\u4e0d\u8981\u5728\u6b64\u6545\u969c\u5b58\u5728\u7684\u60c5\u51b5\u4e0b\u7ee7\u7eed\u9a7e\u9a76\u8f66\u8f86\u3002<\/p>\n<div class=\"workshop-experience-text\">\n<p>\u5728\u6211\u4eec\u7684\u8f66\u95f4\uff0c\u6211\u4eec\u7ecf\u5e38\u9047\u5230P2049\u6545\u969c\u7801\uff0c\u5c24\u5176\u662f\u5728\u6b27\u6d32\u8f66\u8f86\u4e0a\u3002\u4e0a\u5468\u6211\u4eec\u63a5\u5230\u4e86\u4e00\u8f86\u5927\u4f17\u5e15\u8428\u7279TDI\uff0c\u8f66\u8f86\u8868\u73b0\u4e0d\u4f73\u4e14\u53d1\u52a8\u673a\u6545\u969c\u706f\u4eae\u8d77\u3002\u6211\u4eec\u7684\u626b\u63cf\u7ed3\u679c\u663e\u793a\u5b58\u50a8\u4e86P2049\u6545\u969c\u7801\u3002\u6211\u4eec\u5728\u6885\u8d5b\u5fb7\u65af-\u5954\u9a70Sprinter\u548c\u51e0\u8f86\u5965\u8fea\u8f66\u4e0a\u4e5f\u9047\u5230\u8fc7\u7c7b\u4f3c\u95ee\u9898\uff0c\u901a\u5e38\u662f\u7531\u4e8eDEF\u55b7\u5c04\u5668\u5835\u585e\u6216\u6545\u969c\uff0c\u6709\u65f6\u5219\u662f\u7ebf\u8def\u95ee\u9898\u6216DEF\u6db2\u4f4d\u8fc7\u4f4e\u5bfc\u81f4\u3002\u867d\u7136\u5728\u7f8e\u56fd\u5361\u8f66\u548c\u4e9a\u6d32SUV\u4e0a\u4e5f\u5076\u5c14\u4f1a\u770b\u5230\u8fd9\u79cd\u95ee\u9898\uff0c\u4f46\u5728\u6211\u4eec\u8f66\u95f4\u7ef4\u4fee\u7684\u6b27\u6d32\u67f4\u6cb9\u8f66\u4e0a\u66f4\u4e3a\u5e38\u89c1\u3002<\/p>\n<\/div>\n<p>\u5c3d\u7ba1P2049\u662f\u4e00\u4e2a\u53ef\u4ee5\u5e94\u7528\u4e8e1996\u5e74\u4ee5\u540e\u7684\u5404\u79cd\u54c1\u724c\u548c\u8f66\u578b\u7684\u901a\u7528\u6545\u969c\u7801\uff0c\u4f46\u5177\u4f53\u7684\u4fee\u590d\u6b65\u9aa4\u53ef\u80fd\u56e0\u8f66\u8f86\u800c\u5f02\u3002\u5728\u8bca\u65ad\u548c\u4fee\u590d\u6b64\u6545\u969c\u7801\u65f6\uff0c\u8bf7\u52a1\u5fc5\u53c2\u8003\u60a8\u7684\u8f66\u8f86\u7684\u5de5\u5382\u7ef4\u4fee\u4fe1\u606f\u3002<\/p>\n<h2 id=\"systems-and-components-involved\">\u6d89\u53ca\u7684\u7cfb\u7edf\u548c\u90e8\u4ef6<\/h2>\n<p>\u4e0eP2049\u6545\u969c\u7801\u76f8\u5173\u7684\u4e3b\u8981\u90e8\u4ef6\u662f\u8fd8\u539f\u5242\u55b7\u5c04\u9600\uff0c\u4e5f\u79f0\u4e3a\u67f4\u6cb9\u6392\u6c14\u6db2\uff08DEF\uff09\u55b7\u5c04\u5668\u3002\u6b64\u57fa\u4e8e\u7535\u78c1\u9600\u7684\u55b7\u5c04\u5668\u5c06\u8fd8\u539f\u5242\u55b7\u5165\u6392\u6c14\u4e2d\uff0c\u4f5c\u4e3aSCR\u7cfb\u7edf\u7684\u4e00\u90e8\u5206\uff0c\u5e2e\u52a9\u5c06\u6709\u5bb3\u7684\u6c2e\u6c27\u5316\u7269\uff08NOx\uff09\u6392\u653e\u8f6c\u5316\u4e3a\u65e0\u5bb3\u7684\u6c2e\u6c14\u548c\u6c34\u3002<\/p>\n<p>\u5176\u4ed6\u53ef\u80fd\u5bfc\u81f4\u6b64\u6545\u969c\u7801\u7684\u90e8\u4ef6\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>\u8fd8\u539f\u5242\u55b7\u5c04\u9600\u63a7\u5236\u7535\u8def\u7684\u7ebf\u8def\u548c\u8fde\u63a5\u5668<\/li>\n<li>\u9009\u62e9\u6027\u50ac\u5316\u8fd8\u539f\uff08SCR\uff09\u63a7\u5236\u5668<\/li>\n<li>\u52a8\u529b\u603b\u6210\u63a7\u5236\u6a21\u5757\uff08PCM\uff09<\/li>\n<li>\u67f4\u6cb9\u6392\u6c14\u6db2\uff08DEF\uff09\u50a8\u6db2\u7f50\u548c\u7ba1\u8def<\/li>\n<\/ul>\n<h2 id=\"common-causes-of-code-p2049\">P2049\u6545\u969c\u7801\u7684\u5e38\u89c1\u539f\u56e0<\/h2>\n<p>\u89e6\u53d1P2049\u6545\u969c\u7801\u7684\u5e38\u89c1\u539f\u56e0\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>\u8fd8\u539f\u5242\u55b7\u5c04\u9600\/DEF\u55b7\u5c04\u5668\u6545\u969c<\/li>\n<li>\u8fd8\u539f\u5242\u55b7\u5c04\u9600\u63a7\u5236\u7ebf\u8def\u4e2d\u7684\u5f00\u8def\u3001\u77ed\u8def\u6216\u5176\u4ed6\u635f\u574f<\/li>\n<li>DEF\u50a8\u6db2\u7f50\u6db2\u4f4d\u4e0d\u8db3<\/li>\n<li>SCR\u63a7\u5236\u5668\u6216PCM\u56e0\u5185\u90e8\u6545\u969c\u6216\u7f16\u7a0b\u9519\u8bef\u5bfc\u81f4\u7684\u6545\u969c<\/li>\n<\/ul>\n<h2 id=\"symptoms-of-code-p2049\">P2049\u6545\u969c\u7801\u7684\u75c7\u72b6<\/h2>\n<p>\u5f53\u8bbe\u7f6eP2049\u6545\u969c\u7801\u65f6\uff0c\u60a8\u53ef\u80fd\u4f1a\u6ce8\u610f\u5230\u4ee5\u4e0b\u4e00\u79cd\u6216\u591a\u79cd\u75c7\u72b6\uff1a<\/p>\n<ul>\n<li>\u6545\u969c\u6307\u793a\u706f\uff08MIL\uff09\u70b9\u4eae<\/li>\n<li>\u53d1\u52a8\u673a\u6027\u80fd\u4e0b\u964d<\/li>\n<li>\u6392\u6c14\u7ba1\u5192\u51fa\u5927\u91cf\u9ed1\u70df<\/li>\n<li>\u71c3\u6cb9\u6548\u7387\u964d\u4f4e<\/li>\n<li>\u51fa\u73b0\u5176\u4ed6\u4e0eSCR\u7cfb\u7edf\u76f8\u5173\u7684\u6545\u969c\u7801<\/li>\n<\/ul>\n<h2 id=\"diagnosing-code-p2049\">\u8bca\u65adP2049\u6545\u969c\u7801<\/h2>\n<p>\u8981\u6b63\u786e\u8bca\u65adP2049\u6545\u969c\u7801\uff0c\u60a8\u9700\u8981\u4e00\u53f0\u80fd\u591f\u8bfb\u53d6\u52a8\u529b\u603b\u6210\u6545\u969c\u7801\u7684\u626b\u63cf\u5de5\u5177\u3001\u4e00\u53f0\u6570\u5b57\u7535\u538b\u6b27\u59c6\u8868\uff08DVOM\uff09\u548c\u8f66\u8f86\u7684\u5de5\u5382\u7ebf\u8def\u56fe\u548c\u8bca\u65ad\u7a0b\u5e8f\u3002<\/p>\n<p>\u8bca\u65ad\u6b65\u9aa4\uff1a<\/p>\n<ol>\n<li>\n<p>\u76ee\u89c6\u68c0\u67e5\u8fd8\u539f\u5242\u55b7\u5c04\u7cfb\u7edf\u7684\u7ebf\u8def\u548c\u8fde\u63a5\u5668\u3002\u4fee\u590d\u6216\u66f4\u6362\u4efb\u4f55\u635f\u574f\u7684\u7ebf\u8def\u6216\u8fde\u63a5\u5668\u3002<\/p>\n<\/li>\n<li>\n<p>\u8fde\u63a5\u626b\u63cf\u5de5\u5177\u5e76\u68c0\u7d22\u6240\u6709\u5b58\u50a8\u7684DTC\u548c\u51bb\u7ed3\u5e27\u6570\u636e\u3002\u8bb0\u5f55\u6570\u636e\uff0c\u7136\u540e\u6e05\u9664\u6545\u969c\u7801\u3002<\/p>\n<\/li>\n<li>\n<p>\u5982\u679c\u6545\u969c\u7801\u672a\u7acb\u5373\u91cd\u7f6e\uff0c\u8bd5\u9a7e\u8f66\u8f86\uff0c\u76f4\u5230PCM\u6267\u884c\u81ea\u68c0\u6216\u6545\u969c\u7801\u91cd\u7f6e\u3002\u95f4\u6b47\u6027\u6545\u969c\u53ef\u80fd\u8f83\u96be\u8bca\u65ad\u3002<\/p>\n<\/li>\n<li>\n<p>\u5982\u679c\u6545\u969c\u7801\u91cd\u7f6e\uff0c\u4f7f\u7528DVOM\u6839\u636e\u7ebf\u8def\u56fe\u6d4b\u8bd5\u8fd8\u539f\u5242\u55b7\u5c04\u9600\u7684\u7535\u6e90\u548c\u63a5\u5730\u7535\u8def\u3002\u4fee\u590d\u53d1\u73b0\u7684\u4efb\u4f55\u95ee\u9898\u3002<\/p>\n<\/li>\n<li>\n<p>\u5982\u679c\u7535\u6e90\u548c\u63a5\u5730\u6b63\u5e38\uff0c\u4f7f\u7528\u626b\u63cf\u5de5\u5177\u547d\u4ee4\u8fd8\u539f\u5242\u55b7\u5c04\u9600\u5f00\u542f\uff0c\u540c\u65f6\u6d4b\u91cf\u63a7\u5236\u7535\u8def\u7684\u7535\u538b\u3002\u5982\u679c\u7535\u538b\u8d85\u51fa\u8303\u56f4\uff0c\u5219\u6000\u7591SCR\u63a7\u5236\u5668\u6216PCM\u6709\u95ee\u9898\u3002<\/p>\n<\/li>\n<li>\n<p>\u5982\u679c\u63a7\u5236\u7535\u8def\u7535\u538b\u6b63\u5e38\uff0c\u6309\u7167\u5de5\u5382\u8bca\u65ad\u7a0b\u5e8f\u6d4b\u8bd5\u8fd8\u539f\u5242\u55b7\u5c04\u9600\u672c\u8eab\u3002\u5982\u679c\u6d4b\u8bd5\u5931\u8d25\uff0c\u66ff\u6362\u9600\u95e8\u3002<\/p>\n<\/li>\n<\/ol>\n<h2 id=\"repairing-code-p2049\">\u4fee\u590dP2049\u6545\u969c\u7801<\/h2>\n<p>\u4fee\u590dP2049\u6545\u969c\u7801\u6240\u9700\u7684\u5177\u4f53\u4fee\u590d\u63aa\u65bd\u53d6\u51b3\u4e8e\u8bca\u65ad\u51fa\u7684\u6839\u672c\u539f\u56e0\u3002\u6f5c\u5728\u4fee\u590d\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>\u66f4\u6362\u6545\u969c\u7684\u8fd8\u539f\u5242\u55b7\u5c04\u9600<\/li>\n<li>\u4fee\u590d\u8fd8\u539f\u5242\u55b7\u5c04\u9600\u63a7\u5236\u7535\u8def\u4e2d\u7684\u635f\u574f\u7ebf\u8def\u6216\u8fde\u63a5\u5668<\/li>\n<li>\u5982\u679cDEF\u6db2\u4f4d\u4f4e\uff0c\u8865\u5145DEF\u50a8\u6db2\u7f50<\/li>\n<li>\u66f4\u6362\u5931\u6548\u7684SCR\u63a7\u5236\u5668\u6216PCM\uff08\u7f55\u89c1\uff09<\/li>\n<\/ul>\n<p>\u66f4\u6362\u4efb\u4f55\u90e8\u4ef6\u540e\uff0c\u52a1\u5fc5\u6e05\u9664\u6545\u969c\u7801\u5e76\u9a8c\u8bc1\u4fee\u590d\u6548\u679c\u3002<\/p>\n<h2 id=\"preventing-p2049\">\u9884\u9632P2049\u6545\u969c\u7801<\/h2>\n<p>\u5c3d\u7ba1\u5e76\u975e\u6240\u6709\u5f15\u53d1P2049\u7684\u539f\u56e0\u90fd\u53ef\u4ee5\u9884\u9632\uff0c\u4f46\u4ee5\u4e0b\u5efa\u8bae\u53ef\u4ee5\u5e2e\u52a9\u907f\u514d\u4e00\u4e9b\u5e38\u89c1\u7684\u89e6\u53d1\u56e0\u7d20\uff1a<\/p>\n<ul>\n<li>\u4fdd\u6301DEF\u50a8\u6db2\u7f50\u6db2\u4f4d\u5145\u8db3\uff0c\u5e76\u4f7f\u7528\u6b63\u786e\u7684\u6db2\u4f53<\/li>\n<li>\u53ca\u65f6\u5904\u7406\u4efb\u4f55DEF\u7cfb\u7edf\u6cc4\u6f0f<\/li>\n<li>\u907f\u514d\u4fee\u6539\u6216\u7981\u7528\u4efb\u4f55\u6392\u653e\u7cfb\u7edf\u90e8\u4ef6<\/li>\n<li>\u9075\u5faa\u5236\u9020\u5546\u63a8\u8350\u7684\u7ef4\u62a4\u8ba1\u5212<\/li>\n<\/ul>\n<h2 id=\"repair-cost-estimates\">\u4fee\u590d\u6210\u672c\u4f30\u7b97<\/h2>\n<p>\u4fee\u590dP2049\u6545\u969c\u7801\u7684\u6210\u672c\u56e0\u6839\u672c\u539f\u56e0\u548c\u5de5\u65f6\u8d39\u7387\u800c\u5f02\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u89c1\u4fee\u590d\u7684\u7c97\u7565\u4f30\u7b97\uff08\u96f6\u4ef6+\u4eba\u5de5\uff09\uff1a<\/p>\n<ul>\n<li>\u8fd8\u539f\u5242\u55b7\u5c04\u9600\u66f4\u6362\uff1a400-800\u7f8e\u5143\/340-680\u6b27\u5143<\/li>\n<li>\u7ebf\u8def\u4fee\u590d\uff1a100-300\u7f8e\u5143\/85-255\u6b27\u5143<\/li>\n<li>SCR\u63a7\u5236\u5668\u66f4\u6362\uff1a1000-2000\u7f8e\u5143\/850-1700\u6b27\u5143<\/li>\n<li>PCM\u66f4\u6362\uff1a1000-2000\u7f8e\u5143\/850-1700\u6b27\u5143<\/li>\n<\/ul>\n<h2 id=\"related-faults\">\u76f8\u5173\u6545\u969c\u7801<\/h2>\n<p>\u5176\u4ed6\u53ef\u80fd\u4e0eP2049\u540c\u65f6\u51fa\u73b0\u7684\u6545\u969c\u7801\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>P20EE &#8211; SCR NOx\u50ac\u5316\u5242\u6548\u7387\u4f4e\u4e8e\u9608\u503c\u7b2c1\u6392<\/li>\n<li><a href=\"https:\/\/www.ziptuning.com\/zh\/blog\/p204f-reductant-system-performance\/\" title=\"P204F - \u8fd8\u539f\u5242\u7cfb\u7edf\u6027\u80fd\u95ee\u9898\">P204F &#8211; \u8fd8\u539f\u5242\u7cfb\u7edf\u6027\u80fd\u95ee\u9898<\/a><\/li>\n<li>P207F &#8211; \u8fd8\u539f\u5242\u8d28\u91cf\u6027\u80fd\u95ee\u9898<\/li>\n<li><a href=\"https:\/\/www.ziptuning.com\/zh\/blog\/p20e8-scr-nox-catalyst-efficiency-below-threshold\/\" title=\"P20E8 - \u8fd8\u539f\u5242\u55b7\u5c04\u9600\u7535\u8def\u8303\u56f4\/\u6027\u80fd\u95ee\u9898\">P20E8 &#8211; \u8fd8\u539f\u5242\u55b7\u5c04\u9600\u7535\u8def\u8303\u56f4\/\u6027\u80fd\u95ee\u9898<\/a><\/li>\n<\/ul>\n<p>\u59cb\u7ec8\u89e3\u51b3\u6240\u6709\u51fa\u73b0\u7684\u6545\u969c\u7801\uff0c\u4ee5\u786e\u4fdd\u5f7b\u5e95\u4fee\u590d\u3002<\/p>\n<p>\u901a\u8fc7\u4e86\u89e3P2049\u6545\u969c\u7801\u7684\u539f\u56e0\u3001\u75c7\u72b6\u3001\u8bca\u65ad\u548c\u4fee\u590d\uff0c\u60a8\u53ef\u4ee5\u66f4\u6709\u6548\u5730\u89e3\u51b3\u6b64\u95ee\u9898\u5e76\u4fdd\u6301SCR\u7cfb\u7edf\u7684\u6b63\u5e38\u8fd0\u884c\u3002\u5728\u4fee\u7406\u4efb\u4f55\u8f66\u8f86\u65f6\uff0c\u8bf7\u52a1\u5fc5\u53c2\u8003\u5de5\u5382\u7ef4\u4fee\u4fe1\u606f\u5e76\u9075\u5faa\u9002\u5f53\u7684\u5b89\u5168\u9884\u9632\u63aa\u65bd\u3002<\/p>\n<h2 id=\"frequently-asked-questions-about-p2049-reductant-injection-valve-circuit-high-voltage\">\u5173\u4e8eP2049\u7684\u5e38\u89c1\u95ee\u9898<\/h2>\n<h3 id=\"what-does-obd-ii-code-p2049-mean-\">OBD-II\u6545\u969c\u7801P2049\u7684\u542b\u4e49\u662f\u4ec0\u4e48\uff1f<\/h3>\n<p>P2049\u8868\u793a\u52a8\u529b\u603b\u6210\u63a7\u5236\u6a21\u5757\uff08PCM\uff09\u68c0\u6d4b\u5230\u7b2c1\u6392\u3001\u7b2c1\u5355\u5143\u7684\u8fd8\u539f\u5242\u55b7\u5c04\u9600\u63a7\u5236\u7535\u8def\u4e2d\u7684\u7535\u538b\u8fc7\u9ad8\u3002\u8fd8\u539f\u5242\u55b7\u5c04\u9600\uff0c\u4e5f\u79f0\u4e3a\u67f4\u6cb9\u6392\u6c14\u6db2\uff08DEF\uff09\u55b7\u5c04\u5668\uff0c\u662f\u9009\u62e9\u6027\u50ac\u5316\u8fd8\u539f\uff08SCR\uff09\u7cfb\u7edf\u7684\u4e00\u90e8\u5206\uff0c\u7528\u4e8e\u51cf\u5c11NOx\u6392\u653e\u3002<\/p>\n<h3 id=\"how-severe-is-code-p2049-can-i-still-drive-with-this-code-\">P2049\u6545\u969c\u7801\u6709\u591a\u4e25\u91cd\uff1f\u6211\u8fd8\u80fd\u7ee7\u7eed\u9a7e\u9a76\u5417\uff1f<\/h3>\n<p>P2049\u88ab\u8ba4\u4e3a\u662f\u4e25\u91cd\u6545\u969c\u7801\uff0c\u5e94\u5c3d\u5feb\u5904\u7406\u3002\u5728\u6b64\u6545\u969c\u7801\u5b58\u5728\u7684\u60c5\u51b5\u4e0b\u7ee7\u7eed\u9a7e\u9a76\u8f66\u8f86\u5e76\u4e0d\u63a8\u8350\uff0c\u56e0\u4e3a\u8fd9\u53ef\u80fd\u4f1a\u7981\u7528SCR\u7cfb\u7edf\uff0c\u5e76\u53ef\u80fd\u5bfc\u81f4\u50ac\u5316\u5668\u635f\u574f\u3002<\/p>\n<h3 id=\"what-are-the-common-symptoms-of-code-p2049-\">P2049\u6545\u969c\u7801\u7684\u5e38\u89c1\u75c7\u72b6\u662f\u4ec0\u4e48\uff1f<\/h3>\n<p>P2049\u6545\u969c\u7801\u8bbe\u7f6e\u65f6\uff0c\u53ef\u80fd\u4f1a\u51fa\u73b0\u4ee5\u4e0b\u5e38\u89c1\u75c7\u72b6\uff1a<\/p>\n<ul>\n<li>\u6545\u969c\u6307\u793a\u706f\uff08MIL\uff09\u70b9\u4eae<\/li>\n<li>\u53d1\u52a8\u673a\u6027\u80fd\u4e0b\u964d<\/li>\n<li>\u6392\u6c14\u7ba1\u5192\u51fa\u5927\u91cf\u9ed1\u70df<\/li>\n<li>\u71c3\u6cb9\u6548\u7387\u964d\u4f4e<\/li>\n<li>\u51fa\u73b0\u5176\u4ed6\u4e0eSCR\u7cfb\u7edf\u76f8\u5173\u7684\u6545\u969c\u7801<\/li>\n<\/ul>\n<h3 id=\"what-causes-code-p2049-\">P2049\u6545\u969c\u7801\u7684\u5e38\u89c1\u539f\u56e0\u662f\u4ec0\u4e48\uff1f<\/h3>\n<p>\u53ef\u80fd\u5f15\u53d1P2049\u6545\u969c\u7801\u7684\u539f\u56e0\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>\u8fd8\u539f\u5242\u55b7\u5c04\u9600\/DEF\u55b7\u5c04\u5668\u6545\u969c<\/li>\n<li>\u8fd8\u539f\u5242\u55b7\u5c04\u9600\u63a7\u5236\u7535\u8def\u4e2d\u7684\u7ebf\u8def\u6216\u8fde\u63a5\u5668\u635f\u574f<\/li>\n<li>DEF\u50a8\u6db2\u7f50\u6db2\u4f4d\u4e0d\u8db3<\/li>\n<li>SCR\u63a7\u5236\u5668\u6216PCM\u56e0\u6545\u969c\u6216\u7f16\u7a0b\u9519\u8bef\u5bfc\u81f4\u7684\u6545\u969c<\/li>\n<\/ul>\n<h3 id=\"what-components-are-involved-with-code-p2049-\">\u54ea\u4e9b\u90e8\u4ef6\u4e0eP2049\u6545\u969c\u7801\u76f8\u5173\uff1f<\/h3>\n<p>\u4e3b\u8981\u76f8\u5173\u90e8\u4ef6\u662f\u8fd8\u539f\u5242\u55b7\u5c04\u9600\/DEF\u55b7\u5c04\u5668\u3002\u5176\u4ed6\u76f8\u5173\u90e8\u4ef6\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>\u8fd8\u539f\u5242\u55b7\u5c04\u9600\u63a7\u5236\u7535\u8def\u7684\u7ebf\u8def\u548c\u8fde\u63a5\u5668<\/li>\n<li>SCR\u63a7\u5236\u5668<\/li>\n<li>PCM<\/li>\n<li>DEF\u50a8\u6db2\u7f50\u548c\u7ba1\u8def<\/li>\n<\/ul>\n<h3 id=\"what-do-i-need-to-diagnose-code-p2049-\">\u8bca\u65adP2049\u6545\u969c\u7801\u9700\u8981\u54ea\u4e9b\u5de5\u5177\uff1f<\/h3>\n<p>\u8981\u6b63\u786e\u8bca\u65adP2049\u6545\u969c\u7801\uff0c\u60a8\u9700\u8981\uff1a<\/p>\n<ul>\n<li>\u80fd\u591f\u8bfb\u53d6\u52a8\u529b\u603b\u6210DTC\u7684\u626b\u63cf\u5de5\u5177<\/li>\n<li>\u6570\u5b57\u7535\u538b\u6b27\u59c6\u8868\uff08DVOM\uff09<\/li>\n<li>\u5177\u4f53\u8f66\u8f86\u7684\u5de5\u5382\u7ebf\u8def\u56fe\u548c\u8bca\u65ad\u7a0b\u5e8f<\/li>\n<\/ul>\n<h3 id=\"what-are-the-basic-diagnostic-steps-for-code-p2049-\">\u8bca\u65adP2049\u6545\u969c\u7801\u7684\u57fa\u672c\u6b65\u9aa4\u662f\u4ec0\u4e48\uff1f<\/h3>\n<ol>\n<li>\u76ee\u89c6\u68c0\u67e5\u8fd8\u539f\u5242\u55b7\u5c04\u7cfb\u7edf\u7684\u7ebf\u8def\u548c\u8fde\u63a5\u5668\u3002\u4fee\u590d\u4efb\u4f55\u53d1\u73b0\u7684\u635f\u574f\u3002<\/li>\n<li>\u626b\u63cf\u6240\u6709\u6545\u969c\u7801\u5e76\u8bb0\u5f55\u51bb\u7ed3\u5e27\u6570\u636e\u3002\u6e05\u9664\u6545\u969c\u7801\u5e76\u91cd\u65b0\u6d4b\u8bd5\u3002<\/li>\n<li>\u5982\u679c\u6545\u969c\u7801\u91cd\u7f6e\uff0c\u4f7f\u7528DVOM\u68c0\u67e5\u8fd8\u539f\u5242\u55b7\u5c04\u9600\u7684\u7535\u6e90\u548c\u63a5\u5730\u3002\u6839\u636e\u9700\u8981\u8fdb\u884c\u4fee\u590d\u3002<\/li>\n<li>\u5728\u9600\u95e8\u901a\u7535\u7684\u60c5\u51b5\u4e0b\uff0c\u4f7f\u7528\u626b\u63cf\u5de5\u5177\u547d\u4ee4\u9600\u95e8\u5f00\u542f\uff0c\u540c\u65f6\u6d4b\u91cf\u63a7\u5236\u7535\u8def\u7535\u538b\u3002<\/li>\n<li>\u5982\u679c\u63a7\u5236\u7535\u538b\u8d85\u51fa\u8303\u56f4\uff0c\u6000\u7591SCR\u63a7\u5236\u5668\u6216PCM\u6545\u969c\u3002<\/li>\n<li>\u5982\u679c\u63a7\u5236\u7535\u538b\u6b63\u5e38\uff0c\u6d4b\u8bd5\u8fd8\u539f\u5242\u55b7\u5c04\u9600\u672c\u8eab\uff0c\u82e5\u6545\u969c\u5219\u66f4\u6362\u3002<\/li>\n<\/ol>\n<h3 id=\"can-other-codes-be-related-to-p2049-\">\u5176\u4ed6\u6545\u969c\u7801\u662f\u5426\u53ef\u80fd\u4e0eP2049\u76f8\u5173\uff1f<\/h3>\n<p>\u662f\u7684\uff0c\u53ef\u80fd\u4e0eP2049\u540c\u65f6\u51fa\u73b0\u7684\u5176\u4ed6SCR\u7cfb\u7edf\u76f8\u5173\u7684\u6545\u969c\u7801\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>P20EE SCR\u6548\u7387\u4f4e\u4e8e\u9608\u503c<\/li>\n<li><a href=\"https:\/\/www.ziptuning.com\/zh\/blog\/p204f-reductant-system-performance\/\" title=\"P204F \u8fd8\u539f\u5242\u7cfb\u7edf\u6027\u80fd\u95ee\u9898\">P204F \u8fd8\u539f\u5242\u7cfb\u7edf\u6027\u80fd\u95ee\u9898<\/a><\/li>\n<li>P207F \u8fd8\u539f\u5242\u8d28\u91cf\u6027\u80fd\u95ee\u9898<\/li>\n<li><a href=\"https:\/\/www.ziptuning.com\/zh\/blog\/p20e8-scr-nox-catalyst-efficiency-below-threshold\/\" title=\"P20E8 \u8fd8\u539f\u5242\u55b7\u5c04\u9600\u7535\u8def\u8303\u56f4\/\u6027\u80fd\u95ee\u9898\">P20E8 \u8fd8\u539f\u5242\u55b7\u5c04\u9600\u7535\u8def\u8303\u56f4\/\u6027\u80fd\u95ee\u9898<\/a><\/li>\n<\/ul>\n<h3 id=\"what-repairs-are-commonly-needed-to-fix-code-p2049-\">\u4fee\u590dP2049\u6545\u969c\u7801\u901a\u5e38\u9700\u8981\u54ea\u4e9b\u4fee\u590d\u63aa\u65bd\uff1f<\/h3>\n<p>\u6839\u636e\u8bca\u65ad\u51fa\u7684\u6839\u672c\u539f\u56e0\uff0c\u5e38\u89c1\u7684\u4fee\u590d\u63aa\u65bd\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>\u66f4\u6362\u6545\u969c\u7684\u8fd8\u539f\u5242\u55b7\u5c04\u9600<\/li>\n<li>\u4fee\u590d\u8fd8\u539f\u5242\u55b7\u5c04\u9600\u63a7\u5236\u7535\u8def\u4e2d\u7684\u635f\u574f\u7ebf\u8def\u6216\u8fde\u63a5\u5668<\/li>\n<li>\u5982\u679cDEF\u6db2\u4f4d\u4f4e\uff0c\u5219\u8865\u5145DEF\u50a8\u6db2\u7f50<\/li>\n<li>\u66f4\u6362SCR\u63a7\u5236\u5668\u6216PCM\uff08\u7f55\u89c1\uff09<\/li>\n<\/ul>\n<h3 id=\"will-i-need-to-replace-the-reductant-injection-valve-\">\u6211\u9700\u8981\u66f4\u6362\u8fd8\u539f\u5242\u55b7\u5c04\u9600\u5417\uff1f<\/h3>\n<p>\u5f53P2049\u6545\u969c\u7801\u8bbe\u7f6e\u65f6\uff0c\u901a\u5e38\u9700\u8981\u66f4\u6362\u8fd8\u539f\u5242\u55b7\u5c04\u9600\u3002\u7136\u800c\uff0c\u9996\u5148\u5e94\u8fdb\u884c\u9002\u5f53\u7684\u8bca\u65ad\uff0c\u4ee5\u786e\u5b9a\u9600\u95e8\u662f\u5426\u771f\u7684\u6709\u6545\u969c\uff0c\u56e0\u4e3a\u7ebf\u8def\u6545\u969c\u7b49\u5176\u4ed6\u95ee\u9898\u4e5f\u53ef\u80fd\u5bfc\u81f4\u6b64\u6545\u969c\u7801\u3002<\/p>\n<h3 id=\"how-much-does-it-cost-to-repair-code-p2049-\">\u4fee\u590dP2049\u6545\u969c\u7801\u7684\u8d39\u7528\u662f\u591a\u5c11\uff1f<\/h3>\n<p>\u4fee\u590dP2049\u7684\u8d39\u7528\u6839\u636e\u6839\u672c\u539f\u56e0\u548c\u5de5\u65f6\u8d39\u7387\u800c\u5f02\uff0c\u4ee5\u4e0b\u662f\u4e00\u4e9b\u7c97\u7565\u4f30\u7b97\uff1a<\/p>\n<ul>\n<li>\u8fd8\u539f\u5242\u55b7\u5c04\u9600\u66f4\u6362\uff1a400-800\u7f8e\u5143<\/li>\n<li>\u7ebf\u8def\u4fee\u590d\uff1a100-300\u7f8e\u5143<\/li>\n<li>SCR\u63a7\u5236\u5668\u66f4\u6362\uff1a1000-2000\u7f8e\u5143<\/li>\n<li>PCM\u66f4\u6362\uff1a1000-2000\u7f8e\u5143<\/li>\n<\/ul>\n<h3 id=\"can-low-def-fluid-cause-code-p2049-\">DEF\u6db2\u4f4d\u8fc7\u4f4e\u4f1a\u5f15\u53d1P2049\u6545\u969c\u7801\u5417\uff1f<\/h3>\n<p>\u662f\u7684\uff0cDEF\u50a8\u6db2\u7f50\u6db2\u4f4d\u4e0d\u8db3\u662f\u53ef\u80fd\u5f15\u53d1P2049\u6545\u969c\u7801\u7684\u539f\u56e0\u4e4b\u4e00\u3002\u8fd8\u539f\u5242\u55b7\u5c04\u9600\u4eceDEF\u50a8\u6db2\u7f50\u4e2d\u62bd\u53d6\u6db2\u4f53\uff0c\u56e0\u6b64\u5982\u679c\u6db2\u4f4d\u8fc7\u4f4e\uff0c\u53ef\u80fd\u4f1a\u8bbe\u7f6e\u6b64\u6545\u969c\u7801\u3002<\/p>\n<h3 id=\"how-often-does-the-reductant-injection-valve-need-to-be-replaced-\">\u8fd8\u539f\u5242\u55b7\u5c04\u9600\u9700\u8981\u591a\u4e45\u66f4\u6362\u4e00\u6b21\uff1f<\/h3>\n<p>\u8fd8\u539f\u5242\u55b7\u5c04\u9600\u6ca1\u6709\u7279\u5b9a\u7684\u66f4\u6362\u95f4\u9694\u3002\u4e00\u822c\u60c5\u51b5\u4e0b\uff0c\u5f53\u9600\u95e8\u6545\u969c\u65f6\u624d\u9700\u8981\u66f4\u6362\u3002\u7136\u800c\uff0c\u884c\u9a76\u91cc\u7a0b\u8f83\u9ad8\u7684\u8f66\u8f86\uff08\u8d85\u8fc7100,000\u82f1\u91cc\uff09\u53ef\u80fd\u66f4\u5bb9\u6613\u51fa\u73b0\u9600\u95e8\u6545\u969c\u3002<\/p>\n<h3 id=\"can-i-replace-the-reductant-injection-valve-myself-\">\u6211\u53ef\u4ee5\u81ea\u5df1\u66f4\u6362\u8fd8\u539f\u5242\u55b7\u5c04\u9600\u5417\uff1f<\/h3>\n<p>\u66f4\u6362\u8fd8\u539f\u5242\u55b7\u5c04\u9600\u662f\u4e00\u9879\u590d\u6742\u7684\u7ef4\u4fee\uff0c\u9700\u8981\u62c6\u9664\u6392\u6c14\u90e8\u4ef6\u4ee5\u4fbf\u63a5\u89e6\u9600\u95e8\u3002\u5982\u679c\u60a8\u6ca1\u6709\u9ad8\u7ea7\u6280\u80fd\u3001\u8f66\u8f86\u5347\u964d\u8bbe\u5907\u548c\u6240\u9700\u7684\u4e13\u7528\u5de5\u5177\uff0c\u5219\u4e0d\u5efa\u8bae\u81ea\u884c\u7ef4\u4fee\u3002<\/p>\n<h3 id=\"what-happens-if-i-ignore-code-p2049-\">\u5982\u679c\u6211\u5ffd\u89c6P2049\u6545\u969c\u7801\uff0c\u4f1a\u53d1\u751f\u4ec0\u4e48\uff1f<\/h3>\n<p>\u5ffd\u89c6P2049\u6545\u969c\u7801\u53ef\u80fd\u4f1a\u5bfc\u81f4SCR\u7cfb\u7edf\u7981\u7528\uff0c\u5bfc\u81f4NOx\u6392\u653e\u663e\u8457\u589e\u52a0\u3002\u968f\u7740\u65f6\u95f4\u7684\u63a8\u79fb\uff0c\u8fd9\u4e5f\u53ef\u80fd\u5bf9SCR\u50ac\u5316\u5668\u9020\u6210\u6f5c\u5728\u635f\u5bb3\u3002\u8f66\u8f86\u53ef\u80fd\u65e0\u6cd5\u901a\u8fc7\u6392\u653e\u6d4b\u8bd5\uff0c\u4e14\u6545\u969c\u706f\u4f1a\u4e00\u76f4\u4eae\u8d77\uff0c\u76f4\u5230\u95ee\u9898\u4fee\u590d\u3002<\/p>\n<h3 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