Question about 2000 Buick Century

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Egr valve was replaced but the service engine light will not turn off how do i turn off the service engine light ?

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You need an OBD II scanner to reset the light. Assuming that you don't have one, you can go to your local Auto Zone or Advance Auto Parts and they will reset the light for you for free using an OBD II scanner. Let me know if you have any further questions. Thanks for rating my response and for using FixYa!

Posted on Jul 21, 2009

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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

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What does the check engine code p0406 mean on my dodge caravan with a 3.3L engine?


P0406 - Exhaust Gas Recirculation Sensor A Circuit High
An improper voltage signal is sent to ECM through the valve

Early Models : The EGR valve control the amount of exhaust gas routed to the intake manifold. Vacuum is applied to the EGR valve in response to the throttle opening. The vacuum control the movement of the taper valve connected to the vacuum diaphragm in the EGR valve.

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Late Models : The EGR volume control valve uses a step motor to control the flow rate of EGR from exhaust manifold. This motor has four winding phases. It operates according to the output pulse signal of the ECM. Two windings are turned ON and OFF in sequence. Each time an ON pulse is issued, the valve opens or closes, changing the flow rate. When no change in the flow rate is needed, the ECM does not issue the pulse signal. A certain voltage signal is issued so that the valve remains at that particular opening.

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Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Engine hesitation

Possible causes
- Harness or connectors (EGR volume control valve circuit is open or shorted.)
- EGR volume control solenoid valve
- EGR temperature sensor and circuit

Possible solution
- Repair EGR harness or connector
- Replaced EGR volume control solenoid valve
- Replaced EGR volume control valve


Hope helps (remember to rate and comment this answer).

Mar 31, 2011 | Dodge Caravan Cars & Trucks

2 Answers

Engin light #po406 2005 ram quad cab


P0406 - Exhaust Gas Recirculation Sensor A Circuit High

Early Models : The EGR valve control the amount of exhaust gas routed to the intake manifold. Vacuum is applied to the EGR valve in response to the throttle opening. The vacuum control the movement of the taper valve connected to the vacuum diaphragm in the EGR valve.

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Late Models : The EGR volume control valve uses a step motor to control the flow rate of EGR from exhaust manifold. This motor has four winding phases. It operates according to the output pulse signal of the ECM. Two windings are turned ON and OFF in sequence. Each time an ON pulse is issued, the valve opens or closes, changing the flow rate. When no change in the flow rate is needed, the ECM does not issue the pulse signal. A certain voltage signal is issued so that the valve remains at that particular opening.

zjlimited_231.gif

Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Engine hesitation

Possible causes
- Harness or connectors (EGR volume control valve circuit is open or shorted.)
- EGR volume control solenoid valve
- EGR temperature sensor and circuit

Possible solution
- Repair EGR harness or connector
- Replaced EGR volume control solenoid valve
- Replaced EGR volume control valve
When is the code detected?
- An improper voltage signal is sent to ECM through the valve


Hope helps.

Mar 06, 2011 | 2005 Dodge Ram

1 Answer

Service engine light on P1404


EGR valve pintle stuck open, which in most cases is a false alarm. But as a precaution just replace the EGR valve

Oct 02, 2009 | 2000 Oldsmobile Silhouette

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

1 Answer

Service engine soon light


if it is for the EGR valve again, replace the valve and the DPFE sensor. Not sure what an EGR regulator is. Could be a bad hose going to the DPFE, or a clogged tube or EGR port also.

Jun 18, 2009 | 2002 Ford Explorer

1 Answer

Service engine code indicates EGR valve.


You could have a restriction in the egr ports. remove the valve. Plug the holes, start engine. 1 hole will be blowing out exhaust, the other will have large vacuum.

Mar 28, 2009 | 2001 Chevrolet Lumina

2 Answers

SERVICE ENGINE LIGHT ON FAILED EMISSIONS


Yes, take it back. The might of replaced the Egr valve to turn off the light. Don't let them charge you for retesting it, that's why you took it in in the first place.

Mar 13, 2009 | 1996 Chevrolet Corsica

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

Engine service light


The DPFE (Diferential Pressure Sensor)sensor is usually mounted on the engine and is connected to the pipe that runs from the exhaust manifold to the EGR valve with two rubber hoses. When the sensor goes bad, the Check Engine light comes on and typically sets any or all of teh following fault codes: P0171 & P0174 (lean codes), and/or P0401 (insufficient EGR flow). Nine out of ten times, the fault is not a bad EGR valve or a vacuum leak, but a bad DPFE sensor. A replacement costs about $112 at Ford, or about $48 at an aftermarket auto parts store.I hope this helps.

Sep 30, 2008 | 2001 Ford Mustang

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