Ya gotta get with it....
A quick oogle got this:

P0403 is an OBD-II generic code that indicates that the engine control module (ECM) has detected the engine exhaust gas recirculation (EGR) circuit has malfunctioned.
The ECM detected a short or open circuit in the EGR vacuum control solenoid or wiring to the solenoid.

So, a short or open in the solenoid. The solenoid applies or vents vacuum to the diaphragm to move the EGR valve. The computer controls the solenoid to get the EGR flow it desires, based on the DPFE sensor reported pressure differential.(pressure difference) The computer then commands the solenoid to open or close, and move the valve parts. The valve had sensors to tell the computer 'where' it was in older designs, but uses the pressure as a 'right now' measure of where the valve is.
The code indicates the 'power' wire to make the solenoid move has a problem. Check the wires for chafing, cuts in the insulation, disconnect or loose connectors, etc. Computer says the wires have a problem.
tom

 

So which one of these two is this solenoid?

 

Well that was a dumb question-- only one has an electrical connection. It was completely unhooked! Easy fix, now lets hope it wasn't unhooked by the previous owner to supress another issue.

 

Well that was a dumb question-- only one has an electrical connection. It was completely unhooked! Easy fix, now lets hope it wasn't unhooked by the previous owner to supress another issue.

In which case, replacing the part which was unplugged may apply, espc if the fault codes agree. You might look for/refer back to any recent work that was done. Possible overlooked detail resulting from a previous repair.

You can also use Google to search for the symptoms of a would-be failed/compromised EGR valve to be used as a baseline for anything you may notice as consequence of reconnecting the valve; e.g. Rough idle, cylinder misfire, lean/rich conditions, stuttering/hesitating @ low speed and accelerating, etc.

 

Well that was a dumb question-- only one has an electrical connection. It was completely unhooked! Easy fix, now lets hope it wasn't unhooked by the previous owner to supress another issue.

In which case, replacing the part which was unplugged may apply, espc if the fault codes agree. You might look for/refer back to any recent work that was done. Possible overlooked detail resulting from a previous repair.

You can also use Google to search for the symptoms of a would-be failed/compromised EGR valve to be used as a baseline for anything you may notice as consequence of reconnecting the valve; e.g. Rough idle, cylinder misfire, lean/rich conditions, stuttering/hesitating @ low speed and accelerating, etc.

It's been running beautifully since I have reconnected the EGR.

 

Hey guys my name is Brett I have a 2003 Ford escape XLT 3.0 and I put a computer on it yesterday and it came up that the EGR valve malfunction something malfunction faulty and po403 and it came up PO 404 I believe also but I wonder can a ABS sensor get shorted out and do the same thing and cuz I seen that the ABS sensor is linked up to the EGR valve pressure sensor and all that so I wondered if it would have anything to do with it that's the only thing is wrong with it is that AGR valves are all I mean leave you the EGR valve is brand new all the auction sensors or brand new I replaced everything except for the pressures the pressure switch sensor that's the only thing I have not changed the one that hooks up and the hose runs in and runs out of it not the one not the EGR valve solenoid I changed that the new one on it didn't change it but I put I'm talking about the other sensor where the hose hooks up from the to another hose and just has a plug plugged into it it's a pressure vacuum pressure solenoid I guess please help I don't want it to be the PCU thank you ECU

 

I will strongly recommend checking out www.charm.li
diagnostic, and repair flow charts that are easy to use, and free

 

The diagnostic says misfire one cylinder 2 and that the ventilation system for the vapor for the vacuum lines or malfunctioning