Question about 1999 Ford Expedition

2 Answers

I got a 401 code exhaust recirculation insufficient what is the process of elimination for this code

Posted by on

  • jasonstierna Jun 27, 2009

    coulud that be a problem if it is a brand new one it is only about a month old

  • jasonstierna Jun 27, 2009

    thank you

×

2 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Ford Master
  • 5,495 Answers

There are two repairs. The EGR pressure switch is in back of the motor with 2 vacuum lines and 1 electric plug. It is mounted on a small pipe in the rear of the engine. It costs about $40. The next repair is to remove the throttle body and clean the soot out of the manifold, buy a $10 gasket and reassembly.
Repair 1 may be all you need.

Posted on Jun 27, 2009

  • fordexpert Jun 28, 2009

    The part you replaced set a trouble code. It is possible that you need to clear the old code. You can do this by disconnecting the battery for 10 minutes or taking it to an autoparts chain and asking them to remove the code for you. The code will work its way out of the system after 30 to 80 starting sequences. My second repair about the soot may still be needed. The computer only knows there is insufficent flow and does not know the difference between soot and bad parts. An EGR can be bad but you can attach a vacuum source to the EGR and see if it moves the valve while it is on the engine. Or you can remove the EGR, move the diaphram by hand and block the vacuum port. If it holds vacuum, the EGR is good.





















×

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    President:

    An expert whose answer got voted for 500 times.

  • Master
  • 410 Answers

More than likely you need to replace your EGR valve. Good luck and thanks for using FixYa!

Posted on Jun 27, 2009

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
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.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

I get a code PO 401, exhaust gas recirculation flow insufficient detected. What defected part will cause this code. my vehicle wont start but turns over.


P0401 typically is seen when the EGR valve itself is clogged with carbon, or the vacuum line leading to the diaphragm is either broken/leaking or disconnected. Also somewhere to check is the vacuum solenoid on the other end of the line attached to the diaphragm. If that solenoid is bad, the vacuum will not be applied to the diaphragm at the appropriate time. What year make model?

Sep 22, 2015 | Ford Cars & Trucks

1 Answer

2000 van. What are the probable causes of DTC P1491?


Definition of Diagnostic Trouble Code P1491 Acura: Exhaust Gas Recirculation (EGR) Valve Insufficient Lift EGR Honda: Exhaust Gas Recirculation (EGR) Valve Insufficient Lift EGR

Jul 16, 2015 | Chrysler Cars & Trucks

1 Answer

PO 325 DTC was indicated on the diagnostic machine when checked. though i have just PO 105, 401, 1301 but all these have been sorted now left with PO 325. Pls does this imply?


code p0325 refers to knock sensor1 bank1--circuit malfunction===causes--wiring--poor connection ---knock sensor.. Check wiring and connections are clean and tight or replace the knock sensor.. The knock sensor adjusts the air /fuel mixture for proper combustion and reads when there is detonation occurring in the cylinder( Rattling-tinny sound under acceleration)

Nov 13, 2013 | 2000 Toyota Camry

1 Answer

Egr PO401


Code 401 is for low EGR air flow. The EGR valve allows exhaust gas to be recirculated back thru the intake and reburned.
The problem could be the EGR valve, the sensor, or a blocked line.

Jun 29, 2013 | Dodge Ram 1500 Cars & Trucks

1 Answer

What is this code 401/null?


is the full code p0401 ? Exhaust Gas Recirculation "A" Flow Insufficient Detected

Jan 26, 2013 | Cars & Trucks

2 Answers

Hi there i have 1997 Avalon V6 . the check engine light up # 138 and 401 so can you tell me the name of that two please thnks


Trouble codes are normaly 4 digits with a "P" or "B" before it. I am gonna assume that you meant P0138 and P0401:
P0138 is Oxygen Sensor Circuit High Voltage (Bank 1, Sensor 2)
P0401 is Exhaust Gas Recirculation Flow Insufficient Detected

A code P0138 may mean that one or more of the following has happened:
  • Faulty O2 sensor
  • Short to battery voltage in O2 sensor signal circuit
  • High fuel pressure (not as likely)
Possible Solutions Here are some potential solutions:
  • Replace O2 sensor
  • Repair short to battery voltage in o2 sensor signal circuit
for info on the P0401:
http://www.obd-codes.com/p0401

Jul 10, 2011 | 1997 Toyota Avalon

3 Answers

96 ford explorer failed emissions test with codes p0401,p0402,p0755,p0756


P0401
EGR stands for Exhaust Gas Recirculation. It is part of the vehicle emmissions system, and is used to reduce combustion temperature and pressure to control Oxides of Nitrogen. There are generally three parts to the EGR system: the EGR valve, an actuator solenoid, and a differential pressure sensor EGR (DPFE). These things work together to deliver the correct amount of recirculation based on engine temperature, load, etc. The P0401 code means that OBD detected an insufficient amount of EGR.

P0402
EGR stands for Exhaust Gas Recirculation. It is part of the vehicle emmissions system, and is used to reduce combustion temperature and pressure to control Oxides of Nitrogen. There are generally three parts to the EGR system: the EGR valve, an actuator solenoid, and a differential pressure sensor (DPF). These things work together to deliver the correct amount of recirculation based on engine temperature, load, etc. The P0402 code means that OBD detected an excessive amount of EGR.

There sound like a bad EGR and need replace it.

P0755 Shift Solenoid B Malfunction and P0756 Shift Solenoid B Performance or Stuck Off. First I suggtes check leve fluids and preventive maintenance.

Tell us news.

Sep 02, 2010 | Ford Explorer Cars & Trucks

2 Answers

I have a OBD II Trouble Code PO401


PO-401
EGR Flow Insufficient Detected

May 15, 2010 | 1999 Chevrolet Lumina

1 Answer

Trouble code 401


P0401 is: Exhaust Gas Recirculation Flow Insufficient Detected

The pipes are supposed to have pressure in them when the EGR valve is open, but sometimes, with the EGR closed may have vacuum... the DPFE compares the pressure/vacuum values from the 2 pipes (these 2 pipes take their pressure before and after an orifice) and knows how much recirculated exhaust gases go through the engine...

Your problem definitely sounds like an EGR problem, but it could be the EGR valve, the DPFE sensor, a clogged hose, a leak/clog somewhere in the EGR piping...

The code basically means your engine either is not getting the amount of burned exhaust gases it should back in the intake to lower NOx emissions or the DPFE sensor thinks your engine is not getting enough burned exhaust gases...

May 07, 2009 | 2000 Mercury Sable

Not finding what you are looking for?
1999 Ford Expedition Logo

148 people viewed this question

Ask a Question

Usually answered in minutes!

Top Ford Experts

yadayada
yadayada

Level 3 Expert

75797 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22114 Answers

fordexpert

Level 3 Expert

5495 Answers

Are you a Ford Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...