The CIL can be quite intermittent until the EGR valve fails completely. The ECM looks at the PID's and there is a certain criteria that must be met to flag a MIL.
The help lines all said , don't jump to replace the egr valve because of the cost, also only buy motercraft ford product which cost 3 times more , after relaceing the fuel filters, changing the gas cap cleaning the egr valve with carburetor cleaner twice, the check engine light would come back on in about 20 miles, so far the dorman egr valve fixed the problem, I have put 100 miles plus !
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Has your EGR valve (your Exhaust Gas Recirculation valve) gone bad? Maybe. I'll tell you the symptoms below. But before you start replacing parts, keep in mind that the same engine performance problems that indicate a bad EGR valve can also indicate problems in other parts of the system.
EGR Removal service by ECUFLASH. The purpose of the EGR. The EGR valve helps your car more efficiently and completely burn fuel by recirculating a portion of your exhaust emissions and running it through the combustion process again.
QI have a 2007 Dodge Grand Caravan with the "check engine" light on. I checked it with a code reader and got a P0404 code: "Exhaust Gas Recirculation Circuit Range/Performance." A new EGR valve ...
Abstract: Exhaust gas recirculation (EGR) is an effective strategy to control NOx emissions from diesel engines.The EGR reduces NOx through lowering the oxygen concentration in the combustion chamber, as well as through heat absorption. Several configurations have been proposed, including high- and low-pressure loop EGR, as well as hybrid systems.
Considerations for Estimating Cost. Your brake replacement cost will be heavily influenced by the quality of components used during the service. This is especially true with the pads and rotors which can be very cheap and make an inferior repair appear to be a great deal.