Usually the EGR valve problems show the fault code P0400 - Exhaust Gas Recirculation Flow Malfunction
What does that mean?
The exhaust gas recirculation (EGR) valve is vacuum controlled valve that regulates the amount of exhaust gases that re-enter the cylinders. The powertrain control module (PCM) determines how much based on engine load, temp, and other conditions. If the PCM detects that the amount of exhaust gases entering the cylinder were insufficient or non-existent, this code is set.
Symptoms
No symptoms will likely be noticed by the driver other than the MIL (malfunction indicator lamp). However, non visible symptoms will be increased combustion temperature and increased Nox emissions.
Causes
A code P0400 may mean that one or more of the following has happened:
* Plugged EGR passage which restricts the flow of exhaust gasses
* Faulty EGR solenoid
* Faulty EGR solenoid wiring/harness
* Vacuum lines damaged/disconnected to the EGR valve solenoid or to the EGR valve
* Faulty EGR valve
Possible Solutions
Since EGR valve designs are different, no one test will suffice:
* Using a scan tool, operate the EGR valve with the engine running. If the engine stumbles, the problem was likely intermittent wiring problem or intermittent blockage problem
* If engine doesn't stumble, operate the EGR valve manually, if possible. If engine doesn't stumble and die, the ports are likely plugged. Removal of valve and cleaning of all ports will be required
* Checking of solenoid can only usually be done with a scan tool, because most solenoids operate with a duty cycle of voltage, rather than constant voltage
* Check all vacuum lines, hoses, etc for any damage
* Visually inspect the solenoid harness and the solenoid for damage
* Replace EGR valve
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autopartswarehouseHope this helped (remember comment and rated this).
Ok, then it could still not be working, either way I need to know where it is so I can test it and see if its working.
(Last and current comment to Emissionwiz) Besides, I never stated that the solenoid creates the vacuum, I said there was no vacuum on the line, so the solenoid could just be stuck in the mode where it delivers no vacuum
Emissionwiz is an arrogant prick. I don't care what it actually does, I'm asking WHERE ITS AT
I don't care if its my post, You are an arrogant asshole and in my post is CLEARLY SAYS "I need to find my EGR Solenoid so that I can look at it and possibly clean it out." It doesn't matter what it does, I needed to find it and you were being Mr. Holier-Than-Thou-I-Know-More-About-Cars-Than-You. If you are going to look at someones post, HELP THEM, Don't be an asshole cause you know something they don't.
EWiz, I don't care what you think, and I don't care about FixYa, This website is shitty and not helpful at all when its filled with people like you.
like i said cool the language.
cool your jets there, was just explaining how the system worked, had no idea where the valve was on your engine. anyway fixya support will remove the post due to your use of foul language, u don't know me so cool it with the mouth..
temper temper homer.
just clarifing what you posted, no disrespect jerko.
THIS IS YOUR POST AND I QUOTE EGR Solenoid creates no vacuum
the solenoid does not "create" vacuum (vac supply is engine) it just delivers vacuum to the EGR in the right amount and at the right time.
Car is 06 fusion 2.3l auto. Got P0410 and P0491 codes. Found leak and fixed but still have issue. Both solenoids work when tested on same location but not second location. Possible wiring issue or could it be the EGR vale? The solenoid's wiring plugs into the EGR. Is it possible to have a short in the connector? Did not see any damage when inspected.
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