{"id":287682,"date":"2024-10-23T08:15:59","date_gmt":"2024-10-23T08:15:59","guid":{"rendered":"https:\/\/www.ziptuning.com\/zh\/?p=287682"},"modified":"2024-11-04T11:39:43","modified_gmt":"2024-11-04T11:39:43","slug":"p20bd-reductant-heater-temperature-sensor-circuit-range-performance-2","status":"publish","type":"post","link":"https:\/\/www.ziptuning.com\/zh\/blog\/p20bd-reductant-heater-temperature-sensor-circuit-range-performance-2\/","title":{"rendered":"P20BD &#8211; \u8fd8\u539f\u52a0\u70ed\u5668\u6e29\u5ea6\u4f20\u611f\u5668\u7535\u8def\u8303\u56f4\/\u6027\u80fd"},"content":{"rendered":"<h2 id=\"p20bd-reductant-heater-temperature-sensor-circuit-range-performance\">P20BD: Reductant Heater &#8220;B&#8221; Control Circuit\/Open<\/h2>\n<p>The P20BD diagnostic trouble code (DTC) indicates a problem with the Reductant Heater &#8220;B&#8221; Control Circuit in the Selective Catalytic Reduction (SCR) system of diesel engines. This article provides a comprehensive analysis of the P20BD code for engineers and mechanics.<\/p>\n<div class=\"workshop-experience-text\">\n<p>\u5728\u6211\u4eec\u7684\u8f66\u95f4\uff0c\u6211\u4eec\u7ecf\u5e38\u770b\u5230 P20BD \u4ee3\u7801\u51fa\u73b0\u5728\u5404\u79cd\u6b27\u6d32\u54c1\u724c\u4e2d\uff0c\u7279\u522b\u662f\u5728\u5965\u8fea\u3001\u5b9d\u9a6c\u548c\u6885\u8d5b\u5fb7\u65af-\u5954\u9a70\u7684\u67f4\u6cb9\u8f66\u578b\u4e2d\u3002\u6211\u4eec\u6ce8\u610f\u5230\u5b83\u5728\u5965\u8fea Q5 TDI \u548c\u5b9d\u9a6c 3 \u7cfb\u67f4\u6cb9\u8f66\u578b\u4e2d\u7279\u522b\u5e38\u89c1\u3002\u95ee\u9898\u901a\u5e38\u6e90\u4e8e\u6545\u969c\u7684 DEF \u52a0\u70ed\u5668\u6216 SCR \u7cfb\u7edf\u4e2d\u7684\u63a5\u7ebf\u95ee\u9898\u3002\u6709\u8da3\u7684\u662f\uff0c\u6211\u4eec\u89c2\u5bdf\u5230\u8bb8\u591a\u6848\u4f8b\u53d1\u751f\u5728\u6e29\u6696\u6c14\u5019\u6216\u5b63\u8282\uff0c\u8868\u660e\u95ee\u9898\u5e76\u4e0d\u603b\u662f\u4e0e\u52a0\u70ed\u5668\u7684\u5b9e\u9645\u5bd2\u51b7\u5929\u6c14\u64cd\u4f5c\u6709\u5173\u3002\u5728\u5927\u591a\u6570\u60c5\u51b5\u4e0b\uff0c\u66f4\u6362 DEF \u52a0\u70ed\u5668\u6216\u4fee\u590d\u635f\u574f\u7684\u63a5\u7ebf\u53ef\u4ee5\u89e3\u51b3\u95ee\u9898\uff0c\u5c3d\u7ba1\u6709\u65f6\u6211\u4eec\u4e0d\u5f97\u4e0d\u66f4\u65b0\u8f66\u8f86\u7684\u8f6f\u4ef6\u4ee5\u5b8c\u5168\u6e05\u9664\u4ee3\u7801\u3002<\/p>\n<\/div>\n<h2 id=\"urgency-and-severity\">\u7d27\u6025\u6027\u548c\u4e25\u91cd\u6027<\/h2>\n<p>P20BD \u4ee3\u7801\u88ab\u8ba4\u4e3a\u662f\u4e25\u91cd\u95ee\u9898\uff0c\u5e94\u53ca\u65f6\u5904\u7406\u3002\u7ee7\u7eed\u9a7e\u9a76\u53ef\u80fd\u4f1a\u5bfc\u81f4\uff1a<\/p>\n<ol>\n<li>\u53d1\u52a8\u673a\u6027\u80fd\u4e0b\u964d<\/li>\n<li>\u6392\u6c14\u4e2d\u8fc7\u591a\u7684\u9ed1\u70df<\/li>\n<li>\u71c3\u6cb9\u6548\u7387\u964d\u4f4e<\/li>\n<li>\u50ac\u5316\u5242\u53ef\u80fd\u635f\u574f<\/li>\n<\/ol>\n<p>\u867d\u7136\u53ef\u80fd\u53ef\u4ee5\u9a7e\u9a76\u5230\u9644\u8fd1\u7684\u4fee\u7406\u5e97\uff0c\u4f46\u4e0d\u5efa\u8bae\u957f\u65f6\u95f4\u9a7e\u9a76\u3002SCR \u7cfb\u7edf\u53ef\u80fd\u88ab\u7981\u7528\uff0c\u5bfc\u81f4\u6392\u653e\u589e\u52a0\u5e76\u53ef\u80fd\u635f\u574f\u53d1\u52a8\u673a\u3002<\/p>\n<h2 id=\"code-information-and-affected-vehicles\">\u4ee3\u7801\u4fe1\u606f\u53ca\u53d7\u5f71\u54cd\u7684\u8f66\u8f86<\/h2>\n<p>P20BD \u662f\u4e0e SCR \u7cfb\u7edf\u76f8\u5173\u7684\u901a\u7528\u52a8\u529b\u603b\u6210\u4ee3\u7801\u3002\u5b83\u7279\u522b\u8868\u793a\u8fd8\u539f\u5242\u52a0\u70ed\u5668 &#8220;B&#8221; \u7684\u7535\u8def\u5f00\u8def\u6216\u63a7\u5236\u95ee\u9898\u3002\u8be5\u4ee3\u7801\u53ef\u80fd\u5f71\u54cd\u914d\u5907 SCR \u7cfb\u7edf\u7684\u5404\u79cd\u67f4\u6cb9\u8f66\u8f86\uff0c\u5305\u62ec\u4f46\u4e0d\u9650\u4e8e\uff1a<\/p>\n<ul>\n<li>\u6885\u8d5b\u5fb7\u65af-\u5954\u9a70 Sprinter \u9762\u5305\u8f66<\/li>\n<li>\u5965\u8fea Q5 TDI \u8f66\u578b<\/li>\n<li>\u5176\u4ed6\u4f7f\u7528 SCR \u6280\u672f\u7684\u67f4\u6cb9\u8f66\u8f86<\/li>\n<\/ul>\n<h2 id=\"components-and-system-overview\">\u7ec4\u4ef6\u548c\u7cfb\u7edf\u6982\u8ff0<\/h2>\n<p>SCR \u7cfb\u7edf\u4f7f\u7528\u67f4\u6cb9\u6392\u6c14\u6db2 (DEF)\uff0c\u4e5f\u79f0\u4e3a AdBlue\uff0c\u6765\u51cf\u5c11 NOx \u6392\u653e\u3002\u5173\u952e\u7ec4\u4ef6\u5305\u62ec\uff1a<\/p>\n<ol>\n<li>DEF \u7bb1<\/li>\n<li>\u8fd8\u539f\u5242\u52a0\u70ed\u5668<\/li>\n<li>DEF \u55b7\u5c04\u5668<\/li>\n<li>SCR \u50ac\u5316\u5242<\/li>\n<\/ol>\n<p>\u8fd8\u539f\u5242\u52a0\u70ed\u5668\u9632\u6b62 DEF \u5728\u4f4e\u6e29\u4e0b\u51bb\u7ed3\u6216\u7ed3\u6676\u3002\u5b83\u901a\u5e38\u4f4d\u4e8e DEF \u7bb1\u5185\u6216\u9760\u8fd1 DEF \u55b7\u5c04\u5668\u3002<\/p>\n<h2 id=\"common-causes\">\u5e38\u89c1\u539f\u56e0<\/h2>\n<p>\u89e6\u53d1 P20BD \u4ee3\u7801\u7684\u51e0\u4e2a\u56e0\u7d20\u5305\u62ec\uff1a<\/p>\n<ol>\n<li>\u6545\u969c\u7684\u8fd8\u539f\u5242\u52a0\u70ed\u5668<\/li>\n<li>\u52a0\u70ed\u5668\u63a7\u5236\u63a5\u7ebf\u4e2d\u7684\u5f00\u8def\u6216\u77ed\u8def<\/li>\n<li>\u635f\u574f\u7684\u8fd8\u539f\u5242\u6e29\u5ea6\u4f20\u611f\u5668<\/li>\n<li>SCR \u63a7\u5236\u5668\u6216 PCM \u6545\u969c<\/li>\n<li>\u53d1\u52a8\u673a\u63a7\u5236\u6a21\u5757\u4e2d\u7684\u7f16\u7a0b\u9519\u8bef<\/li>\n<\/ol>\n<h2 id=\"diagnostic-procedure\">\u8bca\u65ad\u6b65\u9aa4<\/h2>\n<p>\u8981\u8bca\u65ad P20BD \u4ee3\u7801\uff0c\u8bf7\u6309\u7167\u4ee5\u4e0b\u6b65\u9aa4\u64cd\u4f5c\uff1a<\/p>\n<ol>\n<li>\u8fde\u63a5\u8bca\u65ad\u626b\u63cf\u4eea\u4ee5\u68c0\u7d22\u6240\u6709\u5b58\u50a8\u7684\u4ee3\u7801\u548c\u51bb\u7ed3\u5e27\u6570\u636e\u3002<\/li>\n<li>\u76ee\u89c6\u68c0\u67e5\u8fd8\u539f\u5242\u52a0\u70ed\u7cfb\u7edf\u7684\u7ebf\u675f\u548c\u8fde\u63a5\u5668\u662f\u5426\u6709\u635f\u574f\u3002<\/li>\n<li>\u4f7f\u7528\u6570\u5b57\u7535\u538b\/\u6b27\u59c6\u8868 (DVOM) \u6d4b\u8bd5 SCR \u63a7\u5236\u7cfb\u7edf\u7684\u7535\u6e90\u4f9b\u5e94\u3002<\/li>\n<li>\u4f7f\u7528\u626b\u63cf\u4eea\u6fc0\u6d3b\u8fd8\u539f\u5242\u52a0\u70ed\u5668\u5e76\u6d4b\u8bd5\u8f93\u51fa\u63a7\u5236\u7535\u8def\u7684\u7535\u538b\u3002<\/li>\n<li>\u4f7f\u7528 DVOM \u6d4b\u8bd5\u8fd8\u539f\u5242\u52a0\u70ed\u5668\u5143\u4ef6\uff0c\u5e76\u5c06\u7ed3\u679c\u4e0e\u5236\u9020\u5546\u89c4\u683c\u8fdb\u884c\u6bd4\u8f83\u3002<\/li>\n<li>\u68c0\u67e5\u662f\u5426\u6709\u4e0e\u7279\u5b9a\u8f66\u8f86\u578b\u53f7\u548c\u75c7\u72b6\u76f8\u5173\u7684\u6280\u672f\u670d\u52a1\u516c\u544a (TSB)\u3002<\/li>\n<\/ol>\n<h2 id=\"solutions-and-repair-options\">\u89e3\u51b3\u65b9\u6848\u548c\u7ef4\u4fee\u9009\u9879<\/h2>\n<p>\u6839\u636e\u8bca\u65ad\u7ed3\u679c\uff0c\u7ef4\u4fee\u53ef\u80fd\u5305\u62ec\uff1a<\/p>\n<ol>\n<li>\u66f4\u6362\u6545\u969c\u7684\u8fd8\u539f\u5242\u52a0\u70ed\u5668<\/li>\n<li>\u4fee\u7406\u6216\u66f4\u6362\u635f\u574f\u7684\u63a5\u7ebf\u548c\u8fde\u63a5\u5668<\/li>\n<li>\u66f4\u65b0\u53d1\u52a8\u673a\u63a7\u5236\u6a21\u5757\u8f6f\u4ef6<\/li>\n<li>\u5982\u6709\u5fc5\u8981\uff0c\u66f4\u6362 SCR \u63a7\u5236\u5668\u6216 PCM<\/li>\n<\/ol>\n<h2 id=\"prevention\">\u9884\u9632\u63aa\u65bd<\/h2>\n<p>\u4e3a\u4e86\u9632\u6b62 P20BD \u7684\u518d\u6b21\u53d1\u751f\uff1a<\/p>\n<ol>\n<li>\u4f7f\u7528\u9ad8\u8d28\u91cf\u7684 DEF\uff0c\u5e76\u4fdd\u6301\u9002\u5f53\u7684\u6db2\u4f4d<\/li>\n<li>\u5b9a\u671f\u68c0\u67e5 SCR \u7cfb\u7edf\u7ec4\u4ef6\u662f\u5426\u6709\u78e8\u635f\u6216\u635f\u574f\u7684\u8ff9\u8c61<\/li>\n<li>\u53ca\u65f6\u5904\u7406\u4efb\u4f55 SCR \u76f8\u5173\u7684\u8b66\u544a\u706f\u6216\u6d88\u606f<\/li>\n<\/ol>\n<h2 id=\"cost-analysis\">\u6210\u672c\u5206\u6790<\/h2>\n<p>\u7ef4\u4fee\u8d39\u7528\u56e0\u5177\u4f53\u95ee\u9898\u548c\u8f66\u8f86\u578b\u53f7\u800c\u5f02\u3002\u4f30\u7b97\u8d39\u7528\uff1a<\/p>\n<ul>\n<li>\u8bca\u65ad\u8d39\u7528\uff1a100-200\u7f8e\u5143\uff08\u20ac85-\u20ac170\uff09<\/li>\n<li>\u8fd8\u539f\u5242\u52a0\u70ed\u5668\u66f4\u6362\uff1a300-800\u7f8e\u5143\uff08\u20ac255-\u20ac680\uff09<\/li>\n<li>\u63a5\u7ebf\u4fee\u7406\uff1a200-500\u7f8e\u5143\uff08\u20ac170-\u20ac425\uff09<\/li>\n<li>SCR \u63a7\u5236\u5668\u66f4\u6362\uff1a800-2000\u7f8e\u5143\uff08\u20ac680-\u20ac1700\uff09<\/li>\n<\/ul>\n<h2 id=\"basic-repair-guide\">\u57fa\u672c\u7ef4\u4fee\u6307\u5357<\/h2>\n<p>\u9488\u5bf9\u6709\u7ecf\u9a8c\u7684\u6280\u5e08\uff1a<\/p>\n<ol>\n<li>\u627e\u5230\u8fd8\u539f\u5242\u52a0\u70ed\u5668\uff0c\u901a\u5e38\u4f4d\u4e8e DEF \u7bb1\u5185\u6216\u9760\u8fd1\u55b7\u5c04\u5668\u3002<\/li>\n<li>\u65ad\u5f00\u7535\u6c60\u5e76\u79fb\u9664\u5fc5\u8981\u7684\u7ec4\u4ef6\u4ee5\u8bbf\u95ee\u52a0\u70ed\u5668\u3002<\/li>\n<li>\u62d4\u4e0b\u7535\u6c14\u8fde\u63a5\u5668\u5e76\u79fb\u9664\u6545\u969c\u52a0\u70ed\u5668\u3002<\/li>\n<li>\u5b89\u88c5\u65b0\u7684\u52a0\u70ed\u5668\uff0c\u786e\u4fdd\u6b63\u786e\u5bc6\u5c01\u548c\u7535\u6c14\u8fde\u63a5\u3002<\/li>\n<li>\u91cd\u65b0\u7ec4\u88c5\u5df2\u79fb\u9664\u7684\u7ec4\u4ef6\u5e76\u91cd\u65b0\u8fde\u63a5\u7535\u6c60\u3002<\/li>\n<li>\u6e05\u9664 DTC \u5e76\u8fdb\u884c\u8bd5\u9a7e\u4ee5\u786e\u8ba4\u7ef4\u4fee\u7ed3\u679c\u3002<\/li>\n<\/ol>\n<h2 id=\"related-issues-and-fault-codes\">\u76f8\u5173\u95ee\u9898\u548c\u6545\u969c\u4ee3\u7801<\/h2>\n<p>P20BD \u4ee3\u7801\u53ef\u80fd\u4e0e\u5176\u4ed6 SCR \u76f8\u5173\u4ee3\u7801\u540c\u65f6\u51fa\u73b0\uff0c\u4f8b\u5982\uff1a<\/p>\n<ul>\n<li><a href=\"https:\/\/www.ziptuning.com\/zh\/blog\/p20ba-reductant-heater-control-circuit-low\/\">P20BA\uff1a\u8fd8\u539f\u5242\u52a0\u70ed\u5668 &#8220;A&#8221; \u63a7\u5236\u7535\u8def\u6027\u80fd<\/a><\/li>\n<li><a href=\"https:\/\/www.ziptuning.com\/zh\/blog\/p20bc-reductant-heater-temperature-sensor-circuit\/\">P20BC\uff1a\u8fd8\u539f\u5242\u52a0\u70ed\u5668 &#8220;A&#8221; \u63a7\u5236\u7535\u8def\u4f4e<\/a><\/li>\n<li>P20BE\uff1a\u8fd8\u539f\u5242\u52a0\u70ed\u5668 &#8220;B&#8221; \u63a7\u5236\u7535\u8def\u4f4e<\/li>\n<li><a href=\"https:\/\/www.ziptuning.com\/zh\/blog\/p203f-reductant-dosing-valve-calibration-values-not-learned\/\" title=\"P203F\uff1a\u8fd8\u539f\u5242\u6db2\u4f4d\u8fc7\u4f4e\">P203F\uff1a\u8fd8\u539f\u5242\u6db2\u4f4d\u8fc7\u4f4e<\/a><\/li>\n<\/ul>\n<p>\u8fd9\u4e9b\u4ee3\u7801\u901a\u5e38\u8868\u660e SCR \u7cfb\u7edf\u4e2d\u5b58\u5728\u66f4\u5e7f\u6cdb\u7684\u95ee\u9898\uff0c\u53ef\u80fd\u9700\u8981\u5168\u9762\u8bca\u65ad\u3002<\/p>\n<p>\u901a\u8fc7\u4e86\u89e3 P20BD \u4ee3\u7801\u53ca\u5176\u5f71\u54cd\uff0c\u5de5\u7a0b\u5e08\u548c\u6280\u5e08\u53ef\u4ee5\u6709\u6548\u5730\u8bca\u65ad\u548c\u4fee\u590d SCR \u7cfb\u7edf\u95ee\u9898\uff0c\u786e\u4fdd\u67f4\u6cb9\u8f66\u8f86\u7684\u6700\u4f73\u6027\u80fd\u548c\u6392\u653e\u63a7\u5236\u3002<\/p>\n<h2 id=\"frequently-asked-questions-about-p20bd\">\u5173\u4e8eP20BD\u7684\u5e38\u89c1\u95ee\u9898<\/h2>\n<h3>P20BD\u4ee3\u7801\u662f\u4ec0\u4e48\u610f\u601d\uff1f<\/h3>\n<p>P20BD \u8868\u793a\u8fd8\u539f\u5242\u52a0\u70ed\u5668 &#8220;B&#8221; \u63a7\u5236\u7535\u8def\u5f00\u8def\u3002\u8fd9\u610f\u5473\u7740\u67f4\u6cb9\u6392\u6c14\u6db2 (DEF) \u52a0\u70ed\u5668\u7535\u8def\u5b58\u5728\u7535\u6c14\u95ee\u9898\u3002<\/p>\n<h3>P20BD\u4ee3\u7801\u6709\u591a\u4e25\u91cd\uff1f<\/h3>\n<p>P20BD \u88ab\u8ba4\u4e3a\u662f\u4e00\u4e2a\u4e25\u91cd\u4ee3\u7801\uff0c\u5e94\u8be5\u53ca\u65f6\u5904\u7406\u3002\u5982\u679c\u4e0d\u89e3\u51b3\uff0c\u53ef\u80fd\u5bfc\u81f4\u53d1\u52a8\u673a\u6027\u80fd\u4e0b\u964d\u3001\u6392\u653e\u589e\u52a0\u4ee5\u53ca SCR \u7cfb\u7edf\u635f\u574f\u3002<\/p>\n<h3>P20BD \u7684\u5e38\u89c1\u75c7\u72b6\u662f\u4ec0\u4e48\uff1f<\/h3>\n<p>\u5e38\u89c1\u75c7\u72b6\u5305\u62ec\u53d1\u52a8\u673a\u6545\u969c\u706f\u70b9\u4eae\u3001\u53d1\u52a8\u673a\u529f\u7387\u4e0b\u964d\u3001\u71c3\u6cb9\u6548\u7387\u964d\u4f4e\u4ee5\u53ca\u67d0\u4e9b\u60c5\u51b5\u4e0b\u6392\u6c14\u4e2d\u51fa\u73b0\u8fc7\u591a\u9ed1\u70df\u3002<\/p>\n<h3>P20BD \u4ee3\u7801\u7684\u539f\u56e0\u662f\u4ec0\u4e48\uff1f<\/h3>\n<p>\u5e38\u89c1\u539f\u56e0\u5305\u62ec\u6545\u969c\u7684 DEF 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