Egr valve or sensor
Thread Starter
Junior Member
Joined: Jan 2009
Posts: 3
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From: Flordia
Egr valve or sensor
Hey im new to the site.. MY check engine light been on for a while now i went to auto zone an got it checked out... But all it says is EGR is a error or is what comes up on the screen... I was just wondering if its my EGR VALVE OR EGR SENSOR? If anyone one can help that would be great thxss
Senior Member
Joined: Dec 2008
Posts: 155
Likes: 1
From: Richland hills texas
Egr valves rarely go out I would check the sensor first.
To test egr valve start your engine pop the hood look at the egr diaphram inside the housing it's probably orange and rev your engine and if it moves then it should be ok.
Or just take the egr valve off remove the sensor and I'm pretty sure there is a metal post inside it. If it moves up and down pretty easy and you don't see any tears in the diaphram it's good.
I would bet it's the sensor. Once you do all that and rplace the sensor or valve if needed the take the negative off the battery for a little while and let the computer reset itself
Hope this helps
To test egr valve start your engine pop the hood look at the egr diaphram inside the housing it's probably orange and rev your engine and if it moves then it should be ok.
Or just take the egr valve off remove the sensor and I'm pretty sure there is a metal post inside it. If it moves up and down pretty easy and you don't see any tears in the diaphram it's good.
I would bet it's the sensor. Once you do all that and rplace the sensor or valve if needed the take the negative off the battery for a little while and let the computer reset itself
Hope this helps
Senior Member
Joined: Aug 2008
Posts: 1,499
Likes: 2
From: Liberty, MO
Those are good visual tests to get started. If the diaphragms look ok in the valve and sensor, and the valve moves when you rev the motor, there are other things to continue with.
You could have a bad solenoid - if you have a 5.0 or 5.8 it's on the driver's side valve cover (front one of three located there). Check to see if vacuum is coming out of the solenoid when you rev the motor - just pull the line that runs from it to the egr valve and feel with your finger.
You could also have a crack or hole in the exhaust tube that runs up to the bottom of the egr valve.
Could be a cracked vacuum line or fitting.
See what you get, and we'll go from there.
What year is the truck? What engine?
You could have a bad solenoid - if you have a 5.0 or 5.8 it's on the driver's side valve cover (front one of three located there). Check to see if vacuum is coming out of the solenoid when you rev the motor - just pull the line that runs from it to the egr valve and feel with your finger.
You could also have a crack or hole in the exhaust tube that runs up to the bottom of the egr valve.
Could be a cracked vacuum line or fitting.
See what you get, and we'll go from there.
What year is the truck? What engine?
Last edited by aliens8mycow; Jan 28, 2009 at 10:14 PM.
Thread Starter
Junior Member
Joined: Jan 2009
Posts: 3
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From: Flordia
Me an my dad are goin to try these things in the next couple of days. I will let you all no what it is an stuff. An some also told me the valve just might need to be cleaned could that be a possibility . I got a 1998 F-150 Lariat 4.6 liter. Lol i just tired of seein the check engine..
Thread Starter
Junior Member
Joined: Jan 2009
Posts: 3
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From: Flordia
DPFE sensor?
Me an My dad was checking the volted and the egr sensor is giving the right volted back.
Then we checked the DPFE sensor an we got nothing from it?. Could that also set off the check engine light?
Then we checked the DPFE sensor an we got nothing from it?. Could that also set off the check engine light?