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?

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try changing the d.p.f.e. cost about $35,i just replaced one on a 2003 mercury mountaineer.
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What needs to be done if the service station indicated that the EGR valve is the reason a 98 Mazda Protege SE check engine light came on?

egr vavle is very easy after a few replacements. its located under the throttle body with either 2 10mm or 12mm bolts. along with 1 plug. a little tricky at first, but do not take to a dealership for this, waste of time, and ive done about 30+ of these at my dealership. get the erg and the gasket. v (MORE)

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 minutes, if you have a 12 pin (ALDL)Assembly Line Data Link. (early 94 & back) Use a scanner to remove them if your car is OBD (MORE)

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 are referring to the check engine light and are still receiving a code indicating EGR valve, then the problem is that the EGR v (MORE)

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 faulty computer, or damaged hose somewhere. Talk to the tech who scanned it. Ask for a printout of the codes and an explainati (MORE)

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 - Auto (MORE)

You have a 1997 mercury mountaineer 50 liter and you replaced the egr valve and solenoid what else can be making by check engine stay on?

Answer I had the same problem; did alot of research and found that the ERG valve wasn't the issue. There is a device just before the ERG Valve called a DPFE sensor that was causing the error but the computer couldn't differentiate it. Check out this link and replace this part. It takes about an ho (MORE)

2001 Ford Taurus sel there is a light that looks like the engine you have had it to a mechanic who changed the egr valve and egr solenoid switch the light still lites why does this lite not go out?

\n. \nBuy, borrow or rent an OBDII (On Board Diagnostic 2) code reader, plug it in to the vehicle as instructed, read the code and find out what's going on.\n. \nWith most OBDII code readers, you can clear the code and turn off the light. Then run the engine for a while and see if the light comes (MORE)

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 Du (MORE)

1996 Mazda Millenia check engine light shows egr codes using vacuum tester and pulling vacuum on EGRr valve kills engine Checking egr solenoids vacuum Vent what will turn on the check engine light?

The check engine light is because the EGR 'lift sensor' is showing that the valve is not lifting when it should be, or it is indicating the sensor is open, or the voltage is out of range the lift sensor may be bad, or it's not lifting when it should be (vacuum leak, vacuum switch leak upstream) EGR (MORE)

Your engine light came on a 2001 ford explorer sport trac you replaced egr valve and erased the code what else could it be?

Answer . \nThere is information missing that will help in troubleshooting. First, what codes were indicated in the computer? Not just the numbers (I don't have a ref book handy), but what is the indicated fault? I've thrown money at issues in the past, only to find the light to come on again (MORE)

2001 Pathfinder engine light problem you replaced 2 oxygen sensors then replaced 2 timing sensors the service engine light still on computer shows no code?

Wrong scanner?? If a check engine light is on, there are codes. Timing sensor? Check engine usually means a problem... Service means that scheduled service needs to be performed like oil change, or timing belt replacement. I would Check your Catalytic Converter. What often happens is the catalys (MORE)

What would cause the check engine light to stay on on a 1996 Geo Tracker and the code to say EGR malfunction when the EGR valve is new?

Check Engine Light On . After replacing the EGR valve, use the diagnostic tool and erase codes then read the codes again.. I had the same problem on my 97 geo metro. After replacing the egr valve, the check engine light stayed on. After a while it was suppose to clear itself but it didn't. So I (MORE)

Why does the engine light keep coming on indicating EGR valve in a 2000 Chevy impala after the EGR valve was replaced?

Answer . I just replaced my egr valve and my light went off, however some reasons for yours not to go off might be that the hose/pipe coming out to the eghaust manifold into the egr valve has enough deposits in it to cause a blockage.....signifying that your old egr valve was good, just not gett (MORE)

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 part. They said I had to wait "a while" till the change was recognized. That the computer used some type of formula of engin (MORE)

What sensor will cause the service engine soon light to stay on?

O2 (Oxygen) sensor. HO2S (Heated Oxygen) sensor. ECT (Engine Coolant Temp) sensor. MAF (Mass Air Flow) sensor. MAP (Manifold Absolute Pressure) sensor. CKP (Crankshaft Position) sensor. CMP (Camshaft Position) sensor. ECL (Engine Coolant Level) sensor. EOP (Engine Oil Pressure) sensor. EVP (EGR Valv (MORE)

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 (MORE)

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 hav (MORE)

My check engine light comes on in my 1999 Honda accord v6 and the code po1491 egr valve insufficient lift I have replaced the egr valve but the light continues to come on is there something else wrong?

Most likely the egr ports in the intake manifold are plugged.This requires the removal of the upper intake manifold.Then you can access the egr ports and clean them with a coat hangar and a power drill.The ports clog up as a result of poorthe poor fuel quality we get here in north america.Honda make (MORE)

How do you get the check engine light to go off of 1998 Chevy lumina after you replaced EGR valve two times Code still reads P0401?

I have come across this same problem many times with Ford & Isuzu, & it is worth a shot on your Lumina. You will need to take the EGR valve off & check the port that goes to the intake & make sure that it is clean, many times these ports are so small that they stop up with carbon from the exhaust. I (MORE)

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 friend. Or simply do some more trouble shooting. Many times the engine code doesn't tell the whole truth on any vehicle. Cou (MORE)

How do you reset check engine light after replacing egr valve?

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 light 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 m (MORE)