P0401 福特汽车

 P0401 福特汽车

Dan Hart


如果你还没有这样做,请阅读这里发布的关于DPFE系统的完整解释。 这是福特汽车的一个非常常见的代码,可以使人们绝对疯狂。 不要被吸进这个问题的零件中。 这确实是一个相当简单的系统。

计算机想知道EGR阀是否在重新循环它所指示的废气量。 为了检查这一点,DPFE检查一个端口上下的压力变化。 它以电压变化的形式向PCM报告这一变化。 没有变化或没有足够的变化可能意味着DPFE坏了(有很多这样的情况),EGR阀坏了(不那么常见),或者通道被破坏了充满了废气流动产生的积碳(非常常见)。


1)首先在钥匙打开和发动机关闭的情况下检查DPFE的电压。 这是基础电压。 拔下电气连接器,检查棕色/白色的电线。 它的读数应该是5伏。

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2) 插上连接器,反向探测棕色/浅绿色电线,应该是0.45-0.60伏(在旧的金属外壳的传感器上)。 如果你的DPFE有一个塑料外壳,寻找0.9-1.1伏。 如果你没有看到这些电压,更换DPFE,它是坏的。

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3)启动发动机,再次检查棕色/浅绿色电线上的电压。 它应该与发动机关闭时一样。 如果不是这样,EGR阀泄漏,使废气在怠速时流动。 这是一个禁忌。 清洁或更换EGR阀。

4) 对EGR施加真空(手握泵)。 电压应该上升,这取决于你施加多少真空。 疫苗越高,电压越高。 另外,发动机应该运行粗糙和死亡。 如果你没有看到较高的电压,要么EGR没有打开(这


所以,在你跑出去买一个新的EGR阀之前,清洁节气门体、进气歧管和EGR管中的所有通道。 然后重复测试#4,看看你是否得到一个运行不畅的发动机。 如果发动机运行不畅,但你仍然没有看到更高的电压,那么你可以更换DPFE。

© 2012


Dan Hart

Dan Hart is an automotive enthusiast and expert in car repair and maintenance. With over 10 years of industry experience, Dan has honed his skills through countless hours of working on various makes and models. His passion for cars started at a young age, and he has since turned it into a successful career.Dan's blog, Tips for Car Repair, is a culmination of his expertise and dedication to helping car owners tackle common and complex repair issues. He believes that everyone should have some basic knowledge of car repair, as it not only saves money but also empowers individuals to take control of their vehicle's maintenance.Through his blog, Dan shares practical and easy-to-follow tips, step-by-step guides, and troubleshooting techniques that break down complex concepts into understandable language. His writing style is approachable, making it suitable for both novice car owners and experienced mechanics seeking additional insights. Dan's goal is to equip his readers with the knowledge and confidence needed to tackle car repair tasks on their own, thus preventing unnecessary trips to the mechanic and expensive repair bills.In addition to maintaining his blog, Dan also runs a successful auto repair shop where he continues to serve his community by providing high-quality repair services. His dedication to customer satisfaction and his unwavering commitment to deliveringexceptional workmanship has earned him a loyal customer base over the years.When he's not under the hood of a car or writing blog posts, you can find Dan enjoying outdoor activities, attending car shows, or spending time with his family. As a true car enthusiast, he is always up-to-date with the latest industry trends and eagerly shares his insights and recommendations with his blog readers.With his vast knowledge and genuine passion for cars, Dan Hart is a trusted authority in the field of car repair and maintenance. His blog is an invaluable resource for anyone looking to keep their vehicle running smoothly and avoid unnecessary headaches.