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P0405 coming up. Changed out EGR valve and gasket and EGR sensor. Still reading same code and idle off and dying when bring car to a stop.

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Posted on Jan 02, 2017

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SOURCE: 1997 Mustang Cobra (4V, 4.6L), rough idling, won't stay running

silly question, however did you check the air box for nests. it is not uncommon for rodents to climb in and make themselves at home. i would also say to get a maf from ford. check ALL around the engine compartment and underneath for evidence of rodents and their leavings. youll be very suprised what you may find.cheers

Posted on Dec 19, 2009

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SOURCE: p0401,and p0405 codes showing,have cleaned egr

Oxygen flow monitor

Posted on Jan 13, 2010

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SOURCE: 1992 f250 occasionaly surges and dies when i stop at lights

there is a pressure feed back sensor going bad all the times
also check the two hoses connected to this sensor for crack or blockage
check the pipe that goes to the egr valve for crack
it won't hurt to pull the egr valve back out to check to see if there is any thing cause the valve to stay open

Posted on Mar 07, 2010

Testimonial: "thank you i will let you know if it works "

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SOURCE: '03 Ford F-150, 5.4 L.

First off, EGR valves seldom fail. Yours probably had nothing wrong with it in the first place. 
DPFE sensors, OTOH, have been a problem for Ford for years. Best results have been obtained with the upgraded Ford replacement. 
Make certain the hoses to the DPFE sensor did not get reversed and are not clogged if you have the non-plug-on version. If the upstream hose is getting blown off or is over-pressurized, clogged cats could be the issue.  
Check the Vacuum line at the EGR valve for vacuum at idle and while reving the throttle. It should not have and vacuum while the vehicle is not in motion. 

It should not have any vacuum while the vehicle is not in motion. 
If it does, you'll have EGR flow at the wrong time which usually causes idle problems and low speed stumbling/misfires. EVR solenoid is either dirty or sticking open. Try popping the cap off and cleaning the filter element and the top of the valve with compressed air. 
It takes a minimum of two drive cycles in which OBDII runs the EGR test for it to turn on the MIL if there are failures.

When the code is cleared typically you have to run through a specific cycle. With Ford a normal driving can take a couple of days to a week or more. There is page that lists the cycle and you can run through it about 45 minutes
Click on the link directly:--
Thanks. Keep updated for any more query. You can rate this solution and show your appreciation.

Posted on Aug 28, 2010

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SOURCE: when I come to a

The throttle position sensor [TPS] keeps the engine running when you stop at a light.
it is located under the breather it has a plunger that pushes out against the throttle to keep engine running.

Posted on Nov 13, 2010

Testimonial: "Checked the sensor, found it to be dirty, cleaned it with carb cleaner. Truck runs alot better now. Thanks "

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1 Answer

Code P0405

CEL on, P0405
that dont effect engine running, nor can many more DTC>
DTC = errors.
405 is EGR.
if the egr is stuck open the engine stall.s
if it is not working dead, only the TEST FAILS.
true back to 1987 cars. (about)
its federal mandated test in the USA from then.

EGR is kinda simple on newer cars.
its a valve. and some have read back. telling the brain
hey, i didnt move.
id clean it first.
- EGR volume control solenoid valve
- EGR volume control solenoid valve harness is open or shorted
- EGR volume control solenoid valve circuit poor electrical connection
- EGR temperature sensor and circuit

Jun 25, 2014 | 2003 Mitsubishi Eclipse Spyder

1 Answer

OBD-11 codes 0403 & 0405

code p0403 refers to EGR --circuit malfunction===causes ---wiring--EGR solenoid---ECM
code p0405 refers to EGR valve position sensor A --low input===causes ---wiring ---short to ground---EGRF valve position sensor--- ECM.
By only changing the EGR valve you have not fixed the problems that cause the valve not to work.

Dec 22, 2013 | 2001 Chevrolet Lumina

1 Answer

Stalling wont idle

  • egr valve
  • egr sensor
  • cam shaft sensor
  • barometric pressure sensor (map sensor)
vacuum leak somewhere, out of time, broken timing belt or missing teeth.

Dec 12, 2013 | Cars & Trucks

1 Answer

Haw to fix Code- P0405

code p0405 refers to exhaust gas recirculation(EGR) valve position sensor A-low output.--- causes --wiring shorted to ground--EGR valve position sensor--- ECM would go for the EGR sensor. Use only genuine parts as after market are not always compatible with CPU in the car.

May 18, 2013 | 2001 Dodge Grand Caravan

2 Answers

Idles really rough and today it died while I was stopped at a stop light . Had the codes checked about a week ago and was told my egr valve was bad and needed to be replaced .. I replaced it and it lasted...

There are several codes that can be set by the EGR system. EGR valve failures on Fords are very rare. There is usually something wrong with the EGR Control Solenoid, The EGR ports clogged up, The DPFE sensor (the sensor that monitors the EGR system) or the vacuum lines between the intake manifold and the control solenoid or between the solenoid and the valve.

Fault codes NEVER tell you what parts to replace. They only tell you which engine management system is failing to function properly. Anytime there is a fault code the system has to be diagnosed to find out what is causing it to not operate like it should. You can spend a lot of money on parts and not fix your EGR system if proper diagnosis is not performed.

If the gasket for the EGR valve is leaking it will cause your engine to idle very high and will cause the computer to set "lean O2 sensor" codes. If this is not occuring, it is safe to assume that the EGR gasket is not a problem.

There are many things that can cause your engine to die at a stop light. Everything from a loose battery terminal to a failed computer module to a bad ignition switch, to a malfunctioning Idle Air Control (IAC) valve or an intermittent problem with a Crankshaft Position Sensor. I would recommend having it checked out by a professional if it continues to be a problem.

Dec 19, 2010 | 2003 Ford Focus

1 Answer

Dtc p0405 & p0406 these codes came up when i checked my dtc and would like to know what the codes are and what is needed to correct the problem. any help would be appreciated. I changed the oil and the...

The DTC P0405 is for (Exhaust Gas Recirculation Sensor Circuit "A" Low)

DTC P0406 is for (Exhaust Gas Recirculation Sensor Circuit "A" High)

This would indicate a problem with the EGR valve sensor, or the EGR valve itself is malfunctioning.

Jun 10, 2010 | 2007 Dodge Ram Truck

2 Answers

1992 f250 occasionaly surges and dies when i stop at lights

there is a pressure feed back sensor going bad all the times
also check the two hoses connected to this sensor for crack or blockage
check the pipe that goes to the egr valve for crack
it won't hurt to pull the egr valve back out to check to see if there is any thing cause the valve to stay open

Mar 07, 2010 | 1992 Ford F250

2 Answers

Truck has been dying surging and dying when i come to stop at li

Try shifting to nuetral at stop signs for now. Will it keep running in gear with you foot on the brake? How about with the parking brake? You may have a simple vacuum leak at the brake booster.

Mar 07, 2010 | 1992 Ford F250

1 Answer

I have a 99 gmc sierra 6.0(has 189,xxx miles) and I was stalled on hiway today, ran code p0300. had towed home and I replaced egr valve $185. now ran a code P0405 and will start and idle rough and kill...

CPoP0405 Chevrolet Exhaust Gas Recirculation Sensor A Circuit LowCode p0405 is EGR Sensor A Circut Low. I suggest you recheck your eletrical connections and make sure they are making good contact.

Oct 08, 2009 | 1999 GMC Sierra

3 Answers

P0405 code.. changed egr valve and cleaned passage

The truck has two egr vales unless it's a 4 cylinder, then it has one, if it say your slipping and it's automatic change the filter and oil in the transmission and add Lucas transmission fluid conditioner to the tyranny. If the EGR valve is still giving a code then it means something in the egr system is not working, and one item that comes to mind is the purge canister valve on the evaporative control canister. To test find the purge valve and crimp it off with a pair of vise grips to close the vent then drive it. If it runs good then you have found your problem. Also low vacuum can cause the transmission not to shift correctly as it needs a vac. input for it to shift. Check your transmission fluid if it is brown and sort of smells like onions then the fluid is burnt and will cause all types of erratic behavior. And since I took the time to write this I would like to get some feed back as I am about to stop doing this.

Jul 20, 2009 | 1998 Chevrolet S-10 Pickup

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