02 mountaineer- service engine soon light on- getting 401 and 125 codes have replaced the egr valve egr solenoid and temp sensor service light on again within 2 miles why?
try changing the d.p.f.e. cost about $35,i just replaced one on a 2003 mercury mountaineer.
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What could be wrong with a 1995 Camaro if the code said EGR valve 2 and 3 solenoid bad but after replacing them the check engine light still comes on?
Did you try erasing the stored code. If you don't erase them, they will continue to show, even though new parts were put in. Discontect negative cable from battery for 1 - 2 m…inutes, if you have a 12 pin (ALDL)Assembly Line Data Link. (early 94 & back) Use a scanner to remove them if your car is OBDII compliant. Which would have a 16 pin (ALDL)< some were installed in Pre 96(later 94-95) Or go to Pep Boy's if no scanner is available. After you erase codes, PCM will have to re-learn all it's stored info, and verify new parts to monitor. It will take so many start cycles, and so many miles before it will show any fault codes if any, before you can determine if the parts you replaced cured the problem. Also, did you try testing the wiring and circuits before replacing the solenoids? New parts with malfunctioning wiring or circuits will still show a code as being bad? Test parts and trace circiuts First! Replace parts Last!$$$$$$$$ Search & Destroy for problems, before taking a hit on price for parts. PCM codes, get you in the general problem area. Then it leaves the rest up to you! Some day they will pinpoint them for us, but unfortunately it won't be this day!! When i had this come on with my 95, i found an exhaust leak in the front of the motor near the alternator. I would tighten all your bolts and also look for any vacuum leaks that maybe around. (do this if your codes continue to come back after clearing them)
Why does the engine light keep coming on indicating EGR valve in a 2000 Mazda Protege after the EGR valve and the EGR booster sensor were replaced?
Either there is no Voltage or Vacume going 2 the Valve OR the Passagway under the Valve is Blocked. Clean the EGR Line with carb cleaner to ensure not any blockage. If you ar…e referring to the check engine light and are still receiving a code indicating EGR valve, then the problem is that the EGR valve is being effected by the problem. The EGR valve is not the problem, it is just the component that is being effected. Code readers only tell you the effected part, not necessarily the bad part. This is one of the big problems with autozone's free diagnostics, you get what you pay for.
What can you do with your 99 Mazda Protege when the EGR valve was replaced twice and the sensor once and the engine light is on again?
Please have the vehicle scanned again, and if nessisary, go to a different shop to get a 2nd opinion. It may not be the EGR system at all, it could be something else, like a f…aulty computer, or damaged hose somewhere. Talk to the tech who scanned it. Ask for a printout of the codes and an explaination of each Answer I have been a Mazda tech for 16 years.There are most likely ports clogged in your intake manifold.first check for vacuum at the boost sensor (map sensor)the nipple on the intake can get clogged with debris.If that isn't it,you have the passages clogged in the intake with carbon.you can get to these through the throttle body-you may want to remove it and the egr valve,use a coat hanger,wire,whatever it takes
Why does the engine light keep coming on indicating code PO402 excessive EGR flow detected in a 2000 Mazda protege after the egr valve and EGR booster sensor were replaced?
Answer . The answer posted previously seems to be taken verbatim from this site, and probably copyrighted there: . Mazda EGR Flow: Low or Excessive? http://www.asashop.…org/autoinc/sept2002/techtips.cfm and if that doesn't work, there are additional tips here: . P0402 EGR code Help - Automotive Message Forums http://www.automotivehelper.com/topic478910.htm
On a 1998 4x4 blazer the service engine light was scanned and came up with egr valve you replaced it and the light came on again what could be wrong?
if the code that's comming up is insufficent flow make sure that the opening in the intake where the egr sets ove is not blocked by carbon build up try sticking a piece of wir…e though the opening if it goes in and doesnt bind up its not clogged (opening goes from egr to tbody opening
Service engine light on - code p0401 - EGR Sensor - 1999 Sable - Taurus - could be a build up of carbon Can you clean them or must they be replaced?
You can try cleaning it, but in general, most people have found that it needs to be replaced. Although it is probably too late for this particular user, I recently searched …and searched for an answer to the same questions about the p0401 in the late 90's Sable (Taurus) Mine is a 3.0 24 valve Duratec. I am not sure about the process for any other models. tools required: . throttle body cleaner . paper towels . hard metal wire . socket wrench and a 5/16, and a 10 millimeter deep well . digital camera . patience OK: Here goes. Before you do anything else, do not buy any parts, whatsoever. Get to Autozone...buy some throttle body/air intake cleaner. Detach your negative (most likely black) battery cable (unless you owners manual suggests otherwise) Take a digital picture of how your throttle body looks before you start taking it apart. You will need to know where the various springs reattach. Get yourself a socket wrench, with a 5/16ths, and a deep-well 10 millimeter socket. Take off your air cleaning tube, and make sure you are certain which hoses reconnect to where. once it's off, you'll see a brass plate inside the exposed hold. That is called the throttle plate. There is a lever to the left side that controls when it opens and closes, this lever is attached to a series of springs and a steel cable (the throttle cable). Take off the retention plate for the throttle cable (it will also be valuable to remove the throttle cable from its place, so that you are sure that you have not stretched it out in any way). Then, whip out that 10 mil deepwell, and take off the 3 bolts and one post screw holding the throttle body on. Yes, you are going to clean it, but that comes later, never mind that sticker on the top of the opening that says 'do not clean throttle body,' you won't hurt anything. Take off the throttle body gasket, and do not break it, you will need it later. If it needs scraped off, take a picture of what it looked like for a reference, a discount auto parts store will try to sell you the wrong one, i promise. and that is a whole can of worms in a different story. When you look inside the area revealed by removing the throttle body and gasket, you will see the air intake manifold. See where the egr valve is, looks like it goes into the manifold, right? No, none of those holes that are actually inside the manifold lead to it. Instead, on the face of where the throttle body mounted to the manifold, there is a c-shaped passage-way that has 3 opening that would allow air to bypass the throttle body gasket. remove the egr valve (10 mil as well) and get your piece of hard metal wire. you will have to make a 90 degree turn inside the egr passage to find where its outlet is, but, if you can't get the wire through, that is what is causing your p0401. remove that valve on the top of the air intake passage way (it's your idle air control valve, and you can't go liberally spraying throttle body cleaner into if or you will burn our the little motor at the end). in either case, whether it is completely clogged or not, place a paper towel underneath that c-shaped passage (it took me a while to figure out what people were talking about, mine was solid-black, caked completely with carbon, I didn't even realize it was supposed to be an open channel!!) completely douse it with the throttle body cleaner to break it up a little, and proceed to clean it out with your hard metal wire (a tiny, flat screwdriver might also be helpful, but be careful the cast mold of your air intake is aluminum, and will scratch very easily) repeat as necessary until it is clean, and make sure the passage is open leading to the egr valve (top left of the C). Now you can clean out your throttle body itself. I found it easiest just to spray some cleaner in it, and let it sit. You do not want to scratch the inside of the throttle body. the cleaner, and then a good wiping with some paper towels will do the trick. Get back to Autozone, and bring the throttle body gasket (or picture of it) and order a new one, make absolutely certain that they are the same...remember, can of worms. you don't want what happens with the wrong gasket, it is unbelievably stressful to have your mercury sable station wagon sound like it is ready for the Indy 500. replace all the parts, referencing the first digital pics you took to ensure it's all assembled properly. I would suggest (although it is not necessary) to leave off the clean air tube overnight, and prop a brick on the gas pedal to open the throttle plate, it will allow all the acetone and alcohol from the throttle body cleaner in the a.i. manifold to evaporate. Reattach the clean air tube (if you haven't already) and then reattach your neg. power cable. Start her up...and listen to that kitty purr. just kidding, for a while it will run strange, and unbelievable amounts of smoke will pour out. that's the carbon you cleaned up and the throttle body cleaner burning off. don't stress. Let it idle for a while. An extended strange idle means something went wrong, either a vacuum leak (bad gasket, you could have not reattached a hose) If you took off you neg battery cable, you will find that your SES / CEL light has been reset and is now off. Don't be too confident, this could have only been one of your problems. Drive it for a day or 2, and see if it comes back on. if you get another p0401, then it is 75% certain to be your dpfe sensor. It's back, behind the throttle body, under the a.i. manifold, on the drivers side of the engine. You'll need that 5/16th and alot of blind groping to get it off. The new sensors are shaped differently, so you will also need to get new hoses (which is probably a good practice anyways). the 'ref' hose will need to be at least an inch longer than it was with the factory dpfe sensor. happy times, hope this helps someone. . I'd bet you anything it has nothing to do with your egr valve. Hope you didn't waste the cash on a new one yet. Most often a new dpfe sensor does the trick. But in the Fords, depending on the engine, there is also a passageway that clogs up within your intake manifold. If your egr valve mounts onto the front of the intake on the drivers side, i would take the throttle body off and look just in case. If there is excessive carbon build-up, clean it out with some throttle body cleaner, and it might help your problem. Cheap fix, if your patience isn't considered an expense. Good luck. the dpfe sensor might run you 20-30 bucks, and a new throttle body gasket is 99 cents. Answer It means the PCM sees a lack of EGR valve flow. That could be a problem with the EGR, EGR passages, EGR control system, EGR position sensor, wiring, or PCM. Answer p0401 is insufficient flow in the egr. take off your throttle body and clean out the c-shaped passage on the face of the air intake maniflod. if that fails, get a new dpfe sensor. if that fails, check all of your hoses again. If that fails......well....we're getting closer to a bad pcm here....next is the vacum (evr) then the egr vavle itself. best of luck. my 98 sable has the 24 valve durotec 3.0-it was the passage on the face of the a.i.manifold that caused all of my egr problems. Who told you that, a dealer, mechanic? did they check everything first? did they apply vacum to the valve and see if it was faulty? did they replace the dpfe? 60% of late 90's early 00's ford and mercury p0401's are a bad dpfe sensor. 30%are a clogged egr passage after the throttle body in the manifold. 9% are either the valve or the evr vacum. that leaves 1% to be either a leaky hose, or a pcm. check again before you drop bookoo bucks on a pcm good luck mb Answer It has to do with DPFE sensor circuit high voltage detected. EGR temp sensor malfunction. That is all I can find. Hope this helps. I found this: P1401 Differential Pressure Feedback EGR Circuit High Input It is fairly common for this to be a problem with the sensor, not the EGR valve. The message is misleading. Also, it there is a 1400 message with it, it is most certainly the sensor, not the valve. jcjimz The advice above about the passage from the EGR to the throttle body is good. Usually you don't have to replace thr EGR but if you're taking it off replace it any way, it's not expensive. On the 3 liter DOHC Ford, Mercury engines the problem with the EGR is most always the passage through the manifold to the throttle body. Take off the EGR and the throttle body. From the EGR the port makes a hard right to the throttle body that you can not see. On the throttle body side there is a C shaped groove that is on the left of the main large port. It is probably full of carbon. Get a spray can of B-12 Chemtool and clean it out. You will see on the upper side of this groove that there is a small port. This goes to the EGR. Take your B-12 and clean the entire port then spray it into the port to the EGR. Let it sit then spray it again. Take the hose from the B-12 and spray it from the EGR side too. Let it soak. Do this until you get a steady flow of B-12 from the EGR to the throttle body. After weeks of spending money and time replacing things this was the entire problem and have been told by a reputable mechanic that 90% of the time that's the whole problem.
Why does the check engine light on a 1997 mercury sable stay on after replacing egr valve and egr sensor?
Answer . \nYou need to reset the light with a OBD2 scan tool, after a repair. If you did reset the light and it just came back on, then you have not found the problem. Rem…ember when reading codes, the code does not tell you what component is bad. It only tells you what component is being effected.
94 ranger 2.3 with code for inadequate egr flow detected egr solenoid resistance good replaced egr flow sensor due to code egr solenoid supply voltage is good egr valve is good what else can you check?
Most likely the inside of the EGR valve assembly and/or associated tubing is plugged with exhaust deposits. You'll probably need to either disassemble the EGR assembly to clea…n it out or replace the assembly entirely.
How long do I have to wait till the computer recognizes the change and the Check Engine light goes off after replacing a bad EGR Valve and EGR Solenoid Valve in my 98 Expedition?
Answer . Try disconnecting the battery for about 10 minutes to reset the code. Answer Additional info on question . Went to Autozone to see if I replaced the wrong p…art. They said I had to wait "a while" till the change was recognized. That the computer used some type of formula of engine starts, miles, and gears shifted through before it would turn it off. It has been 3 days, about 8-12 engine starts and about 30 miles.
You just replaced th egr valve for a 2002 Mustang and your check engine light came on a day later and test said it was your egr valve again what can cause this?
Possibly other systems connected to the egr valve are faulty. You may need to have a professional diagnose the problem, rather than replacing parts.
Your 2002 ford escape's check engine light came on and the mechanic said the egr valve needed to be replaced after replacing the egr valve the check engine light came back on within the next 20 miles?
take the negative cable loose on your baterry and reset the light . see if it comes back on if yes you have another sensor gone bad more than likely oxygen sensor. Auto Zone …will connect a code reader to your car computer for FREE and read the trouble code that the CEL is indicating. After you have gotten the code(s) the Zone can print an explanation of what they found on receipt paper for you. Post back here and someone with knowledge of OBD-II trouble codes can help point you in the RIGHT direction.
If the check engine light problem has been diagnosed by a Maxda dealership and the EGR valve replaced why is check engine light on again after 2 months?
Have vehicle scanned - most auto parts stores will do this free to determine problem. Have vehicle scanned - most auto parts stores will do this free to determine problem
In Check Engine Light
97 Geo Tracker Service Engine light code shows something is wrong in EGR section you replaced egr valve and a solonoidand a sensor. The light comes on again after 40 miles I also relaced gas cap?
Hi,\nI can only ask if you have had a smoke test done yet to\ndetermine where the leak is? I also have a '97 and have yet\nto find where mine is. The smoke test comes next. I …also\nhave replaced all of those and more. I think I have a leak \nin the fill tube vent or the overflow. I would try and have\nthe smoke test done and then they might be able to tell \nwhere the leak is. I've been beating my head against the\nwall on this and only keep dumping dollars into the car\nbut I can't afford another so on I go too. Good luck and if \nyou find out, please put another answer here.\nThanks,\nSteve H.
In Ford Windstar
Replaced egr valve check engine light is still on - what else could be related to the 401 trouble code on a Ford Windstar?
Funny, you could have had a trained dealership technician, like me, tell you what the problem is for less than you spent on that EGR valve. Penny wise and dollar foolish my fr…iend. Or simply do some more trouble shooting. Many times the engine code doesn't tell the whole truth on any vehicle. Could be a DPFE sensor or a vac regulator. More that likely the DPFE sensor easy fix. Good Luck See "Related Questions" below for more
In Buick Park Avenue
How do you reset the service engine soon light after replacing the EGR valve in a 1990 Buick Park Avenue?
disconnect your battery and touch the cables together then let the car sit with the battery disconnected for 30min
In Nissan Maxima
Just got a service engine soon light on a 97 maxima with about 140000 mi AutoZone's free check engine it said it was an oxygen sensor and an egr flow. Are they related?
I had the same problem.I took off the egr valve,cleaned it with a wire brush and carb cleaner.Clean out the hoses too.Have the service engine light reset and you should be goo…d.
In Emissions and Exhaust Systems
Try removing negative battery cable for 10 minutes. If that doesnot work you will need an OBD2 scan tool to reset the light. I justcleaned my egr valve and the check engine li…ght went off and Idrove it a little and it came back on how long do I have to drivemy car after work with the egr valve how many miles