Question about Cars & Trucks
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
You probably pulled a code p0401, insufficient egr flow. Your DPFE sensor is more than likely at fault. There has been a lot of trouble with these sensors. Then reset CEL or disconnect battery for 5 minutes.
Posted on Aug 17, 2008
SOURCE: Ford F250 EGR problem
The EGR valve (Exhaust Gas Recirculator) provides a path from ******** to nose of your engine, returning some of the exhaust fumes to the intake to supposedly improve tailpipe emissions.
Uh huh, I agree. Seems like a stupid idea and each car I have cheated (that couldn't tell I was cheating) has gained a little on gas mileage but never as much as 10%.
Your Ford apparently has a sensor to rat you out if you cheat it so the quantity of fumes isn't satisfying that sensor.
This could mean that the EGR is clogged (it's a small hole passing dirty exhaust fumes), failed, or the vacuum line that controls it is cracked or otherwise broken.
Posted on Dec 09, 2008
The EGR valve helps your car more efficiently and completely burn fuel
by recirculating a portion of your exhaust and running it through the
combustion process again. When the EGR valve goes bad, it must be replaced.
The EGR valve, or Exhaust Gas Recirculation valve, is a vacuum controlled valve which allows a specific amount of your exhaust back into the intake manifold. This exhaust mixes with the intake air and actually cools the combustion process. Cooler is always better inside your engine. The exhaust your EGR valve recirculates also prevents the formation of Nitrogen related gases. These are referred to as NOX emissions, and are a common cause for failing emissions testing. Unfortunately, your EGR valve can get stuck, causing NOX gases to build up. You'll know if your EGR valve is stuck or malfunctioning because your car will experience symptoms like rough idle and bucking on acceleration.
Here is a picture of where the EGR Valve is located (Accord 1999). Replacing it is fairly simple and straightforward. A vacuum line and a couple of bolts. You'll see what you have to do when you look at it.
If you are replacing the EGR Valve due to the Check Engine Light (MIL) being on with a DTC P0401 then I suggest contacting your Honda Dealer. There was a Product Update Campaign (PUD) in the fall of 1999 that corrected the problem.
Another times, the clean is the solution...I hope help yoiu with this. Good luck, and remember rated this help.
Posted on Sep 03, 2009
Testimonial: "Thank you very much your knowledge and information you offered concerning my problem and following questions were VERY helpful!(I lost owners manual)"
Your problem may be with another component of the EGR system. It is the Delta Pressure Feedback EGR sensor and it is know to have problems. The sensor is connected to the EGR valve by the two lines coming off it. If you do a image search for DPFE Sensors on your make and model you can get an idea what it look for. It may be tucked back behind the intake and firewall. Also check all the hoses connected to it. A vacuum leak could aslo be at fault.
Because Ford has had a lot of problems with these, it is possible that it may even be under a recall so check with a ford dealer before spending any of your own money.
Hope this helps.
Posted on Sep 27, 2009
Your SUV is really giving you a hard time, lol. Sorry but I've had those days too.
I would try to check if you have blocked EGR passages. If ok check for restricted MAP sensor vacuum hose/passage or restricted exhaust. I know you replaced the CAT but if the muffler is blocked then there would still be a restriction. Also check the wiring and connection to the MAP sensor.
Posted on Apr 28, 2010
Tips for a great answer:
Dec 22, 2014 | Cars & Trucks
Feb 17, 2014 | Suzuki Grand Vitara Cars & Trucks
When the throttle valve is positioned above port R, the EGR vacuum modulator will close the atmosphere
passage and open the EGR valve to increase the EGR gas, even if the exhaust pressure is insufficiently low. ON TOP OF PLENTIUM
Jul 31, 2013 | 1991 Toyota MR2
Sep 29, 2010 | Ford Taurus Cars & Trucks
Aug 19, 2010 | 2004 Ford Explorer
May 16, 2010 | 2002 Ford Crown Victoria
Sep 09, 2009 | 2005 Ford F 250 Super Duty
Sep 02, 2009 | 1999 Ford Escort
Feb 28, 2009 | 2002 Ford Mustang
Feb 24, 2009 | 2001 Ford Escort ZX2
Sep 26, 2017 | Cars & Trucks
47 people viewed this question
Usually answered in minutes!