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1991 ford f-250 with dtc 33 insufficient EGR flow

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6 Suggested Answers

6ya6ya
  • 2 Answers

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

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Posted on Jan 02, 2017

  • 14 Answers

SOURCE: egr valve insufficient flow detected

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

freetek
  • 5568 Answers

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

ZJLimited
  • 17970 Answers

SOURCE: check engine light comes on and off, auto zone

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.

b7a686b.gif

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)"

digritz
  • 530 Answers

SOURCE: got a code 401 EGR insufficient flow. so i changed

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

redbeard00
  • 957 Answers

SOURCE: 2000 isuzu trooper: OBD-II Trouble Code: P0401 Insufficient EGR F

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

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1 Answer

Egr insufficient flow


NO YEAR, STATED.
NO ENGINE STATED.
now that makes this hard, no? my only clue is the body shell.

why not post the DTC error , not your interpretations?
on newer cars there are up to 5 or more EGR DTCs.
the exact dtc or the lack of some , tell the FULL STORY.
for example on newer cars there is EGR feedback readings.

btw: i own a 04GV and have 100%+ documentation on it and can fix any EGR fail on any car made, sure can. GEN1 , to GEN now.
but need more INFO.

Feb 17, 2014 | Suzuki Grand Vitara Cars & Trucks

1 Answer

Where is the egr mod located on a 1991 lexus es 250


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

1 Answer

My DTC indicates egr flow is insufficient. What needs to be done


What are the drivability problems?
I would disconnect the EGR vacuum hose,plug and test drive.
If problem goes away,replace EGR Valve

Sep 29, 2010 | Ford Taurus Cars & Trucks

1 Answer

Engine code p0401 in 2004 ford explorer 4.0 motor insuficient gas flow detected


p0401 is egr flow insufficiant. check or remove and clean egr and port. and also check the vacuum lines to egr. Insufficient EGR flow frequently is caused by clogged EGR passageways.

Aug 19, 2010 | 2004 Ford Explorer

1 Answer

Exhaust Gas Recirculation Flow Insufficient Detected 2002 Ford Crown Victoria LX The car works very good at 60 and I go 35 to city and then when we slow down to city speeds it will have little jerks and we...


P0401 - EGR Flow Insufficient Detected The EGR system is monitored during steady state driving conditions while the EGR is commanded on. The test fails when the signal from the DPF EGR sensor indicates that EGR flow is less than the desired minimum.
  • Vacuum supply
  • EGR valve stuck closed
  • EGR valve leaks vacuum
  • EGR flow path restricted
  • EGRVR circuit shorted to PWR
  • VREF open to D.P.F. EGR sensor
  • D.P.F. EGR sensor downstream hose off or plugged
  • EGRVR circuit open to PCM
  • VPWR open to EGRVR solenoid
  • D.P.F. EGR sensor hoses both off
  • D.P.F. EGR sensor hoses reversed
  • Damaged EGR orifice tube
  • Damaged EGRVR solenoid
  • Damaged PCM
Perform KOER self-test and look for DTC P1408 as an indication of a hard fault. If P1408 is not present, look for contamination, restrictions, leaks, and intermittents.
not likely the PCM, engine computer. they seldom go bad.
report back findings.

May 16, 2010 | 2002 Ford Crown Victoria

2 Answers

2005 Ford F250 Deisel DTC 401 Exhust recirulaton flow insuffent


The DPFE sensor has failed on you egr system .Replace just this part and don't let someone sell you a egr valve .The sensor is about$70 and faily easy to do .:)

Sep 09, 2009 | 2005 Ford F 250 Super Duty

1 Answer

Santa fee 2002 2.4l dtc p0340-p0401-p0102-p0340 again


HI P0340 IS CAM SENSOR CIRCUIT MALFUNCTION P0401 EGR FLOW INSUFFICIENT P0102 MAF CIRCUIT LOW GOOD LUCK

Sep 02, 2009 | 1999 Ford Escort

1 Answer

I am having trouble getting my check light to go off after I had it checked and the EGR valve was replaced. The light comes back on after about 15 miles of driving and the code reads EGR poor flow. I can...


Insufficient EGR Flow Detected

Possible Causes:
DPFE sensor signal circuit is shorted to ground
DPFE sensor VREF circuit is open between sensor and PCM
DPFE sensor downstream hose off or plugged
DPFE sensor hoses both off, loose or damaged
DPFE sensor hoses connected wrong (reversed)
EGR orifice tube is damaged or restricted
PCM has failed
And what sets the code is…….Engine started, engine running in closed loop under steady cruise conditions, and the PCM detected the DPFE sensor input indicated insufficient EGR gas flow. Run the KOER Self-Test, and if DTC P1408 is present, the fault is currently present. This code sets in 2 Trip(s). The light will stay on until the cause is repaired. A bad EGR valve is only on possible cause.

Hope this helps,

Dave

Feb 28, 2009 | 2002 Ford Mustang

1 Answer

Egr vacuum solenoid


Exhaust Gas Recirculation (EGR) System Monitor—Differential Pressure Feedback EGR The Differential Pressure Feedback EGR System Monitor is an on-board strategy designed to test the integrity and flow characteristics of the EGR system. The monitor is activated during EGR system operation and after certain base engine conditions are satisfied. Input from the ECT, CHT, IAT, TP and CKP sensors is required to activate the EGR System Monitor. Once activated, the EGR System Monitor will perform each of the tests described below during the engine modes and conditions indicated. Some of the EGR System Monitor tests are also performed during on demand self-test.
  1. The differential pressure feedback EGR sensor and circuit are continuously tested for opens and shorts. The monitor looks for the Differential Pressure Feedback EGR circuit voltage to exceed the maximum or minimum allowable limits.

    The DTCs associated with this test are DTCs P1400 and P1401.
  1. The EGR vacuum regulator solenoid is continuously tested for opens and shorts. The monitor looks for an EGR Vacuum Regulator circuit voltage that is inconsistent with the EGR Vacuum Regulator circuit commanded output state.

    The DTC associated with this test is DTC P1409.
  1. The test for a stuck open EGR valve or EGR flow at idle is continuously performed whenever at idle (TP sensor indicating closed throttle). The monitor compares the Differential Pressure Feedback EGR circuit voltage at idle to the Differential Pressure Feedback EGR circuit voltage stored during key on engine off to determine if EGR flow is present at idle.

    The DTC associated with this test is DTC P0402.
  1. The differential pressure feedback EGR sensor upstream hose is tested once per drive cycle for disconnect and plugging. The test is performed with EGR valve closed and during a period of acceleration. The PCM will momentarily command the EGR valve closed. The monitor looks for the differential pressure feedback EGR sensor voltage to be inconsistent for a no flow voltage. A voltage increase or decrease during acceleration while the EGR valve is closed may indicate a fault with the signal hose during this test.

    The DTC associated with this test is DTC P1405.
  1. The EGR flow rate test is performed during a steady state when engine speed and load are moderate and EGR vacuum regulator duty cycle is high. The monitor compares the actual Differential Pressure Feedback EGR circuit voltage to a desired EGR flow voltage for that state to determine if EGR flow rate is acceptable or insufficient. This is a system test and may trigger a DTC for any fault causing the EGR system to fail.

    The DTC associated with this test is DTC P0401. DTC P1408 is similar to P0401 but performed during KOER Self-Test conditions.
  1. The MIL is activated after one of the above tests fails on two consecutive drive cycles.
0a01005.gif EGR Vacuum Regulator Solenoid The EGR vacuum regulator solenoid (Figure 88) is an electromagnetic device which is used to regulate the vacuum supply to the EGR valve. The solenoid contains a coil which magnetically controls the position of a disc to regulate the vacuum. As the duty cycle to the coil increases, the vacuum signal passed through the solenoid to the EGR valve also increases. Vacuum not directed to the EGR valve is vented through the solenoid vent to atmosphere. Note that at 0% duty cycle (no electrical signal applied), the EGR vacuum regulator solenoid allows some vacuum to pass, but not enough to open the EGR valve.

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Exhaust Gas Recirculation (EGR) Vacuum Regulator Solenoid Removal and Installation
  1. Disconnect the battery ground cable (14301). For additional information, refer to Section 414-01 .
  1. Disconnect the vacuum hoses and the EVR solenoid electrical connector.
  1. Remove the two nuts and the EVR solenoid (9J459).
From the looks of the rubber mounting, I would say it's mounted on the cowl (firewall) on the passenger side in the engine compartment.

Please rate as fixya if this helps. Thanks

Feb 24, 2009 | 2001 Ford Escort ZX2

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