DPFE Sensor?
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DPFE Sensor?
I have a CEL on. I read the code and it's "EGR flow insufficient". I've done some reading and decided to replace the DPFE sensor first. My question is will a faulty sensor make my truck run slightly rough at times, sort of acts like it's got bad gas in it, but I know it doesnt. I fill up with Chevron or Texaco each time and I run Injector cleaner through at each oil change. I have a 2001 Ford Ranger XLT Supercab with 91,000 miles. Thanks in advance for any help.
Post Fiend
Joined: Jan 2003
Posts: 9,748
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From: Connecticut
Welcome to FTE!
The DPFE sensor helps control the opening and shutting of the EGR valve, and the EGR valve diverts exhaust gas back into the intake and cylinders to be burned. The computer adjusts the fuel injection pulse times based on what it expects the EGR valve to be doing in order to maintain the proper air/fuel ratio. If the EGR system is malfunctioning, it won't be doing things the computer expects it to be doing, which makes for fuel (and possibly timing) adjustments that are not appropriate for actual conditions.
In other words, yes it's possible that a bad DPFE sensor can be a cause of a rough running condition.
The DPFE sensor helps control the opening and shutting of the EGR valve, and the EGR valve diverts exhaust gas back into the intake and cylinders to be burned. The computer adjusts the fuel injection pulse times based on what it expects the EGR valve to be doing in order to maintain the proper air/fuel ratio. If the EGR system is malfunctioning, it won't be doing things the computer expects it to be doing, which makes for fuel (and possibly timing) adjustments that are not appropriate for actual conditions.
In other words, yes it's possible that a bad DPFE sensor can be a cause of a rough running condition.
Posting Guru
Joined: Jul 2003
Posts: 1,978
Likes: 1
From: Alvin, Texas.
I would have checked the hoses running from the DPFE and the EGR tube among other things the Haynes mentions (being as I've dealt with the code in the last month) before spending $75 on a sensor, but hopefully you've spent the money wisely, and the "cheap fixes first" thing won't haunt you.
Good luck.
Good luck.
Senior User
Joined: Mar 2001
Posts: 458
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From: Grande Pradera, TX
I replaced the EGR Valve first. It was only $24. That didn't fix it so I did the DPFE next. That was $42. The 0401 was gone after that. I could've done the DPFE first but the EGR Valve was cheaper.
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Joined: Feb 2006
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Originally Posted by Rockledge
Welcome to FTE!
The DPFE sensor helps control the opening and shutting of the EGR valve, and the EGR valve diverts exhaust gas back into the intake and cylinders to be burned. The computer adjusts the fuel injection pulse times based on what it expects the EGR valve to be doing in order to maintain the proper air/fuel ratio. If the EGR system is malfunctioning, it won't be doing things the computer expects it to be doing, which makes for fuel (and possibly timing) adjustments that are not appropriate for actual conditions.
In other words, yes it's possible that a bad DPFE sensor can be a cause of a rough running condition.
The DPFE sensor helps control the opening and shutting of the EGR valve, and the EGR valve diverts exhaust gas back into the intake and cylinders to be burned. The computer adjusts the fuel injection pulse times based on what it expects the EGR valve to be doing in order to maintain the proper air/fuel ratio. If the EGR system is malfunctioning, it won't be doing things the computer expects it to be doing, which makes for fuel (and possibly timing) adjustments that are not appropriate for actual conditions.
In other words, yes it's possible that a bad DPFE sensor can be a cause of a rough running condition.
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