1997 Toyota Camry, 4Cyl, ATM, 120K+ miles
My Camry's CEL came on last week. I got a hold of a scanner and found OBDII code P0401: Exhaust Gas Recirculation - Insufficient Flow. Could this mean the valve is bad? How can I check for this? Thanks.|||You need to install an EGR VSV to cure the concern|||unplugg the egr see if rpms change,if so just replace it its a lot easier and less hassel by the way rpms will go higher use a vacume tool to check.i have replaced proably 30 of them on 95 98 camrys valves are doubtful depends on miles if u think valves are dirty just have them cleaned but do not use walnut shells if u need help doing this i will tell u later.unplug vacum hose at master cylinder while car is running with somebody inside operating the throttle nevermind ihave to go ask me later sorry|||its a know problem its going to be the rear charcole canister vsv,trust me this is it
Thursday, November 24, 2011
MONDEO MK3 EGR VALVE PROBLem?
had a diagnostic check on my 2001 duratec mondeo petrol came up code p0400 egr exhaust gas recirculation malfunction?? do i need to replace the valve itself ? where is it located on the duratec engine? any help with this would be great car drives great though still|||If it is driving OK and not failing an MOT I would leave it alone. The EGR valve will not be on the engine but somewhere off it like low down at the front.|||the egr valves are a common problem they alway through up a fault
it should be down round the back of the engine i think on the mondeo
either pop it off and clean it out
only image i could find is of a diesle one
see below in the link
also you can buy blanking plates that cover up the egr
for a new egr you would be looking at 拢160-拢200 new|||On the duratec engine your egr solenoid is located underneath your coil pack (follow the ht leads from the plugs to locate the coil pack)As you look at the engine it is on the right hand side of the cylinder head. It is always best to replace this component then clear the fault codes using suitable diagnostic equipment, hope this helps|||Your EGR valve is fitted to your exhaust manifold,it may just need removing and cleaning
it should be down round the back of the engine i think on the mondeo
either pop it off and clean it out
only image i could find is of a diesle one
see below in the link
also you can buy blanking plates that cover up the egr
for a new egr you would be looking at 拢160-拢200 new|||On the duratec engine your egr solenoid is located underneath your coil pack (follow the ht leads from the plugs to locate the coil pack)As you look at the engine it is on the right hand side of the cylinder head. It is always best to replace this component then clear the fault codes using suitable diagnostic equipment, hope this helps|||Your EGR valve is fitted to your exhaust manifold,it may just need removing and cleaning
2000 Chevrolet Silverado?
2000 Chevy ext cab 4.8L v8I got the diagnostic tester thing and it gave me the code and the def. was Exhaust Gas Recirculation control ciruit range/ Performance. Does any one know what this means and how i fix it? please and thanks|||Your Exhaust Gas Recirculation valve is sticking. It needs to be replaced. They are pretty expensive. It is located on the right side (passenger side) of the engine toward the front. It is cylindrical in shape and has a connector at the top. Very easy to replace.|||it is a egr valve and you need a new one it is close to or in line of your exhaust held by 2 or3 bolts it not to hard to do
Ford check engine light?
2001 Ford F150 with 6cyl motor. code P0401 exhaust gas recirculation flow insufficient detected- I am not a auto mechanic.Does anybody know what is wrong? Is it the EGR valve?Can I fix it myself with simple hand tools? Thank you for any help.|||PO401 : Insufficient EGR Flow
The Exhaust Gas Re circulation (EGR) system is designed to reintroduce exhaust gas into the combustion chambers, thereby lowering combustion temperatures and reducing the formation of Oxides of Nitrogen (NOx).
The amount of exhaust gas that is reintroduced into the combustion cycle is determined by several factors, such as: engine speed, engine vacuum, exhaust system back pressure, coolant temperature, throttle position. All EGR valves are vacuum operated. The EGR vacuum diagram for your particular vehicle is displayed on the Vehicle Emission Control Information (VECI) label.
The EGR system is Differential Pressure Feedback EGR (DPFE) system, controlled by the Powertrain Control Module (PCM) and composed of the following components: DPFE sensor (also referred to as the back pressure transducer), EGR Vacuum Regulator (EVR) solenoid, EGR valve, and assorted hoses. The P0401 code means that OBD detected an insufficient amount of EGR.
Symptoms
There may be drive-ability issues such as pinging ( pre-ignition knock , similar to cheap gas) when the vehicles engine is under heavy load or the vehicle is climbing a steep grade. There may also be other symptoms.
Causes
A code P0401 most likely means one or more of the following has happened:
鈥he DPF (differential pressure) sensor is faulty and needs to be replaced
鈥here is a blockage in the EGR (most likely carbon buildup)
鈥he EGR valve is faulty
鈥he EGR valve may not be opening due to a lack of vacuum
Possible Solutions
In fixing this code, it is quite common for people to just replace the EGR valve only to have the OBD code return. The EGR valve is not always the cause. If you replace all 3 components the like is all but guaranteed to go away . Or you can test each component .
鈥se a vacuum pump and pull the EGR valve open while monitoring engine RPM's. There should be a noticeable difference in RPM's with the EGR open
鈥lean out the EGR valve to remove deposits
鈥eplace the DPF sensor
鈥eplace the EGR valve
COMPONENT TESTING
DPFE Sensor
1.Disconnect the pressure hoses at the DPFE sensor.
2.Connect a hand vacuum pump to the downstream pickup marked REF on the sensor.
3.Using a multi meter, back probe the SIG RTN circuit at the DPFE connector.
4.With the ignition ON, signal voltage should be 0.20鈥?.70 volts.
5.Apply 8鈥? in. Hg of vacuum to the sensor. Voltage should be greater than 4 volts.
6.Quickly release the vacuum from the sensor. Voltage should drop to less than 1 volt in 3 seconds.
7.If the sensor does not respond as specified, check the power and ground circuits.
8.If power and ground circuits are functional, the sensor is faulty.
EGR Valve Control Solenoid
1.Remove the EVR solenoid.
2.Attempt to lightly blow air into the EVR solenoid.
A.If air blows through the solenoid, replace the solenoid with a new one.
B.If air does not pass freely through the solenoid, continue with the test.
3.Apply battery voltage (approximately 12 volts) and a ground to the EVR solenoid electrical terminals. Attempt to lightly blow air, once again, through the solenoid.
A.If air does not pass through the solenoid, replace the solenoid with a new one.
B.If air does not flow through the solenoid, the solenoid is OK.
4.If the solenoid is functional but the problem still exists, check the power and ground circuits.
EGR Valve
1.Install a tachometer on the engine, following the manufacturer's instructions.
2.Detach the engine wiring harness connector from the Idle Air Control (IAC) solenoid.
3.Disconnect and plug the vacuum supply hose from the EGR valve.
4.Start the engine, then apply the parking brake, block the rear wheels and position the transmission in Neutral.
5.Observe and note the idle speed.
1.NOTE: If the engine will not idle with the IAC solenoid disconnected, provide an air bypass to the engine by slightly opening the throttle plate or by creating an intake vacuum leak. Do not allow the idle speed to exceed typical idle rpm.
2.Using a hand-held vacuum pump, slowly apply 5鈥?0 in. Hg (17鈥?4 kPa) of vacuum to the EGR valve nipple.
A.If the idle speed drops more than 100 rpm with the vacuum applied and returns to normal after the vacuum is removed, the EGR valve is OK.
B.If the idle speed does not drop more than 100 rpm with the vacuum applied and return to normal after the vacuum is removed, inspect the EGR valve for a blockage; clean it if a blockage is found. Replace the EGR valve if no blockage is found, or if cleaning the valve does not remedy the malfunction.|||replace the DPFE sensor...this things fail constantly and produce that code...i can almost guarantee this will take care of your problem
The Exhaust Gas Re circulation (EGR) system is designed to reintroduce exhaust gas into the combustion chambers, thereby lowering combustion temperatures and reducing the formation of Oxides of Nitrogen (NOx).
The amount of exhaust gas that is reintroduced into the combustion cycle is determined by several factors, such as: engine speed, engine vacuum, exhaust system back pressure, coolant temperature, throttle position. All EGR valves are vacuum operated. The EGR vacuum diagram for your particular vehicle is displayed on the Vehicle Emission Control Information (VECI) label.
The EGR system is Differential Pressure Feedback EGR (DPFE) system, controlled by the Powertrain Control Module (PCM) and composed of the following components: DPFE sensor (also referred to as the back pressure transducer), EGR Vacuum Regulator (EVR) solenoid, EGR valve, and assorted hoses. The P0401 code means that OBD detected an insufficient amount of EGR.
Symptoms
There may be drive-ability issues such as pinging ( pre-ignition knock , similar to cheap gas) when the vehicles engine is under heavy load or the vehicle is climbing a steep grade. There may also be other symptoms.
Causes
A code P0401 most likely means one or more of the following has happened:
鈥he DPF (differential pressure) sensor is faulty and needs to be replaced
鈥here is a blockage in the EGR (most likely carbon buildup)
鈥he EGR valve is faulty
鈥he EGR valve may not be opening due to a lack of vacuum
Possible Solutions
In fixing this code, it is quite common for people to just replace the EGR valve only to have the OBD code return. The EGR valve is not always the cause. If you replace all 3 components the like is all but guaranteed to go away . Or you can test each component .
鈥se a vacuum pump and pull the EGR valve open while monitoring engine RPM's. There should be a noticeable difference in RPM's with the EGR open
鈥lean out the EGR valve to remove deposits
鈥eplace the DPF sensor
鈥eplace the EGR valve
COMPONENT TESTING
DPFE Sensor
1.Disconnect the pressure hoses at the DPFE sensor.
2.Connect a hand vacuum pump to the downstream pickup marked REF on the sensor.
3.Using a multi meter, back probe the SIG RTN circuit at the DPFE connector.
4.With the ignition ON, signal voltage should be 0.20鈥?.70 volts.
5.Apply 8鈥? in. Hg of vacuum to the sensor. Voltage should be greater than 4 volts.
6.Quickly release the vacuum from the sensor. Voltage should drop to less than 1 volt in 3 seconds.
7.If the sensor does not respond as specified, check the power and ground circuits.
8.If power and ground circuits are functional, the sensor is faulty.
EGR Valve Control Solenoid
1.Remove the EVR solenoid.
2.Attempt to lightly blow air into the EVR solenoid.
A.If air blows through the solenoid, replace the solenoid with a new one.
B.If air does not pass freely through the solenoid, continue with the test.
3.Apply battery voltage (approximately 12 volts) and a ground to the EVR solenoid electrical terminals. Attempt to lightly blow air, once again, through the solenoid.
A.If air does not pass through the solenoid, replace the solenoid with a new one.
B.If air does not flow through the solenoid, the solenoid is OK.
4.If the solenoid is functional but the problem still exists, check the power and ground circuits.
EGR Valve
1.Install a tachometer on the engine, following the manufacturer's instructions.
2.Detach the engine wiring harness connector from the Idle Air Control (IAC) solenoid.
3.Disconnect and plug the vacuum supply hose from the EGR valve.
4.Start the engine, then apply the parking brake, block the rear wheels and position the transmission in Neutral.
5.Observe and note the idle speed.
1.NOTE: If the engine will not idle with the IAC solenoid disconnected, provide an air bypass to the engine by slightly opening the throttle plate or by creating an intake vacuum leak. Do not allow the idle speed to exceed typical idle rpm.
2.Using a hand-held vacuum pump, slowly apply 5鈥?0 in. Hg (17鈥?4 kPa) of vacuum to the EGR valve nipple.
A.If the idle speed drops more than 100 rpm with the vacuum applied and returns to normal after the vacuum is removed, the EGR valve is OK.
B.If the idle speed does not drop more than 100 rpm with the vacuum applied and return to normal after the vacuum is removed, inspect the EGR valve for a blockage; clean it if a blockage is found. Replace the EGR valve if no blockage is found, or if cleaning the valve does not remedy the malfunction.|||replace the DPFE sensor...this things fail constantly and produce that code...i can almost guarantee this will take care of your problem
EGR Valve Mystery?
The check engine light on my '89 Geo Metro came on and has stayed on for the past few weeks, occasionally turning off by itself for a little while and then coming back on again. When I flash the codes, it comes up 51, which is Exhaust Gas Recirculation Circuit. I did all the tests in the Chilton and all the components: Value, Modulator and VSV seem to be working fine. I checked the vacuum coming from the throttle body which was 0 in. Hg at idle, but went up to 10 in. Hg or so as I pushed down the accelerator.
Should the vacuum be 0 at idle or does this indicate a vacuum leak?
When I put 10 in. Hg of vacuum on the ERG valve itself when running it moves drastically and the engine runs very poorly. When I warm up the car and put the vacuum gauge on the hose going to the EGR valve, I see that it does get about 10 in. Hg when I push the throttle down.|||Some EGR valves work off a differential pressure balance so they operate differently on the engine than off engine on a vacuum tester. Many times the EGR passage ways into the intake manifold get clogged up too. I've had to have the intake manifold cleaned on some Fords I own.|||The valve is open at idle, responding to the higher vacuum and lower demand for fuel ,as the throttle opens and rpms(along with demand for fuel , the valve should close.
Your problem is probably the sensor for the Egr. It's a cheap part 15-30 bucks.
I'd r+r that first.|||Generally (and I mean generally), this is an indication that one of your pollution control sensors is intermittently going bad. Time to take it to a qualified mechanic.|||The EGR only opens under moderate thottle with a "load" on the engine.(in drive)
There are three points of vacuum.
1) Manifold vacuum. (high at idle)
2)Throttle vacuum (high at high speeds)
3) Ventury vacuum (a mix of the two above)
The EGR primarily controls detonation durring cruising speeds in conjunction with timing advance.
You could have a plugged port to the EGR valve. At idle, the engine should die if the EGR valve is actuated.|||It seems you have a vacuum leak...the vacuum at idle should be between 18 to 22 inches vacuum, closer to 22 usually. If you are checking by pulling the vacuum hose off the throttle body, and putting the gage there, you should get full vacuum at idle.
Check to see your throttle body bolts are tight, then you may have to take it off and check under it to make sure there isn't carbon/dirt built up under it.|||possible 0/2 sensor
Should the vacuum be 0 at idle or does this indicate a vacuum leak?
When I put 10 in. Hg of vacuum on the ERG valve itself when running it moves drastically and the engine runs very poorly. When I warm up the car and put the vacuum gauge on the hose going to the EGR valve, I see that it does get about 10 in. Hg when I push the throttle down.|||Some EGR valves work off a differential pressure balance so they operate differently on the engine than off engine on a vacuum tester. Many times the EGR passage ways into the intake manifold get clogged up too. I've had to have the intake manifold cleaned on some Fords I own.|||The valve is open at idle, responding to the higher vacuum and lower demand for fuel ,as the throttle opens and rpms(along with demand for fuel , the valve should close.
Your problem is probably the sensor for the Egr. It's a cheap part 15-30 bucks.
I'd r+r that first.|||Generally (and I mean generally), this is an indication that one of your pollution control sensors is intermittently going bad. Time to take it to a qualified mechanic.|||The EGR only opens under moderate thottle with a "load" on the engine.(in drive)
There are three points of vacuum.
1) Manifold vacuum. (high at idle)
2)Throttle vacuum (high at high speeds)
3) Ventury vacuum (a mix of the two above)
The EGR primarily controls detonation durring cruising speeds in conjunction with timing advance.
You could have a plugged port to the EGR valve. At idle, the engine should die if the EGR valve is actuated.|||It seems you have a vacuum leak...the vacuum at idle should be between 18 to 22 inches vacuum, closer to 22 usually. If you are checking by pulling the vacuum hose off the throttle body, and putting the gage there, you should get full vacuum at idle.
Check to see your throttle body bolts are tight, then you may have to take it off and check under it to make sure there isn't carbon/dirt built up under it.|||possible 0/2 sensor
My car read this code po400 what does it mean.?
Exhaust Gas Recirculation Flow. what do i have to do|||here you go.http://www.obd-codes.com/p0400. Now knowing what you have to do, assuming you have all the tools . Good luck. That`s all I am willing to do|||A code P0400 may mean that one or more of the following has happened:
* Plugged EGR passage which restricts the flow of exhaust gasses
* Faulty EGR solenoid
* Faulty EGR solenoid wiring/harness
* Vacuum lines damaged/disconnected to the EGR valve solenoid or to the EGR valve
* Faulty EGR valve
* Plugged EGR passage which restricts the flow of exhaust gasses
* Faulty EGR solenoid
* Faulty EGR solenoid wiring/harness
* Vacuum lines damaged/disconnected to the EGR valve solenoid or to the EGR valve
* Faulty EGR valve
MVA emmision test diagnostic fixes?
i own a infiniti i30
i took it to the emmision and i got the response bellow:
*p0400 exhaust gas recirculation A flow
*p0325 knock sensor 1 circuit bank 1 or single sesor
i was talkin to a mechanic and they were talking about 400$ of repairs..
i need advice onwaht to do? or where i can buy the parts from to get it installed cheaper..|||The Exhaust Gas Recirculation (EGR) valve may have carbon buildup which can be cleaned out without replacing the expensive EGR valve. The adjacent intake manifold EGR passageways need to be cleaned of excessive carbon buildup when the EGR valve is removed. That may correct the engine knock, so do that first.
i took it to the emmision and i got the response bellow:
*p0400 exhaust gas recirculation A flow
*p0325 knock sensor 1 circuit bank 1 or single sesor
i was talkin to a mechanic and they were talking about 400$ of repairs..
i need advice onwaht to do? or where i can buy the parts from to get it installed cheaper..|||The Exhaust Gas Recirculation (EGR) valve may have carbon buildup which can be cleaned out without replacing the expensive EGR valve. The adjacent intake manifold EGR passageways need to be cleaned of excessive carbon buildup when the EGR valve is removed. That may correct the engine knock, so do that first.
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