Question about 2003 Hyundai Santa Fe

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Egr valve registering on computer causing checkengine light

Replaced egr valve. problem persists. is this just a remove and replace issue or is it more involved than that. please explain complete proper install proceeder for new egr valve 2003 hyudai santa fe 4cylinder

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  • yadayada
    yadayada May 11, 2010

    I don't care what u have done, just give me the original fault code

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  • Hyundai Master
  • 5,568 Answers

You may have to reset the error memory of the on board computer via a brand and model specific procedure. Some errors may be erased simply by turning the ignition on and off a particular number of times.

Posted on May 04, 2010

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1 Answer

Ford Escort P1405 Error Code


Are you sure you have EGR flow?? Hold the EGR valve open the engine should run poorly, if not you have no flow.

May 31, 2012 | 1998 Ford Escort

4 Answers

Grand carvan gives p402 code


This is not a cut and dry fault code. This means that more than one thing wrong can set the code in the computers memory. Here is the low down on the P0402 fault code. This is from the OBD2 fault code diagnostic book.

P0402 - Exhaust Gas Recirculation Flow Excessive Detected
Symptoms - Engine Light ON (or Service Engine Soon Warning Light)
- Possible engine hesitation
Possible causes - EGR solenoid valve harness is open or shorted
- EGR solenoid valve circuit poor electrical connection
- EGR volume control valve stuck closed
- Dead (Weak) battery
- Faulty EGR temperature sensor and circuit
- Faulty EGR Valve
- EGR passage clogged
- Exhaust gas leaks

Jan 18, 2012 | Cars & Trucks

1 Answer

Egr trouble light


The EGR Valve and System - it's just three letters, but EGR can result in AGGravation.

Common in automobile emission systems since the early 1970s, the EGR (Exhaust Gas Recirculation) valve controls an engine's emission of smog-causing nitrous oxides, or NOx. Its job is to route a portion of the exhaust gases back into the intake manifold. That lowers combustion temperature to below 2,500 degrees Fahrenheit - the temperature at which NOx gases form.

EGR flow is controlled by the engine's computer, which opens or closes the valve as needed. The EGR system is, for the most part, in the "out of sight, out of mind" category, and typical doesn't require regular maintenance. But if it gets clogged with carbon deposits, you'll see your "check engine" light come on, and a code (perhaps P0401 or P0402 or P0403) will show that there is insufficient flow. That typically results from a vehicle being driven persistently on short trips that don't allow the engine to fully warm up. Flow problems also can be caused by carbon buildup due to failure to change the oil frequently enough.

A clogged EGR valve not only results in higher emissions, it can affect fuel economy and cause rough idling - even serious engine damage. Valves can usually be cleaned, but replacement is often recommended.

A code P0401 most likely means one or more of the following has happened:
* The DPFE (differential pressure feedback EGR) sensor is faulty and needs to be replaced
* There is a blockage in the EGR (tube), most likely carbon buildup
* The EGR valve is faulty
* The EGR valve may not be opening due to a lack of vaccuum

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 culprit.
* Use a vacuum pump and pull the EGR valve open while monitoring engine RPM's & DPFE voltage. There should be a noticable difference in RPM's with the EGR open
* Clean out the EGR valve and/or tubing to remove deposits
* Check the voltage at the DPFE, compare to specified values (refer to a repair manual for your specific model)
* Replace the DPFE sensor (with a good quality / OEM one)
* Replace the EGR valve

Jan 11, 2011 | 1999 Isuzu Trooper

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

No running problems just ses light keeps coming on throwing code p0401


P0401 is mean you have problem with EGR. It could be debris make a blockage on your EGR linkage. Including the valve, clean them thoroughly and re-install and start your car. If problem persist, the potential cause is the valve and need a replacement.

Aug 18, 2010 | Mitsubishi Galant Cars & Trucks

1 Answer

Check eng light on low egr flow replace the egr valve and senore check eng light now says evap and low egr flow?


A very common issue that can cause this code is the EGR valve but most commonly the DPFE Sensor differential pressure feedback egr. For the evap code would make sure no lines may have been disconnected while replacing the egr valve. It is possible the the evap code may be a separate issue.

May 31, 2010 | 2000 Ford Expedition

2 Answers

EGR code keeps coming on


It may be, but the code will specify what the problem is as a lot of things can trigger an EGR code. There are numerous codes that relate to the EGR, but the individual code will usually pinpoint what the issue is.
Some causes could be the DPFE sensor is faulty; there is a blockage in the EGR (tube), most likely carbon buildup; the EGR valve is faulty; the EGR valve may not be opening due to a lack of vaccuum

Aug 25, 2009 | 2002 Mazda Tribute

4 Answers

Replace egr valve


If the replaced the erg valve and the light came back on, you still have a problem, probably different then what they fixed.

Feb 01, 2009 | 2001 Buick Regal

1 Answer

Service Engine Soon


Hi,

A couple of things you can try:
  • remove the negative battery terminal to reset your car's computer. There are some car stereos that would require a security code when the battery is removed;
  • on your next fill up, try if you can get a higher octane gas instead of your normal, say if you use to put in 91, shift temporarily to 95;
  • add a can of injector/carb cleaner in your gas tank;
  • on a long stretch, drive aggressively and hard. The idea is to clean your fuel system, combustion chamber, valves, exhaust manifold, catalytic converter, exhaust system including your EGR and O2 sensors.
If error indicator persist, trace the EGR wiring with special attention to the connectors at the ends.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards. Thank you for using FixYa.

Aug 17, 2008 | 1997 Ford Thunderbird LX

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