The exhaust gas recirculation valve , Beaver State the EGR valve , represent a lowly element inch your fomite designed to leave the flow of exhaust gases into the intake manifold in small-scale amounts . This embody a simple valve that opens and closes when information technology needs to . This is either to let exhaust gases into the combustion chamber , or to close and then that prevent the gases from enter . Now , when the car engine make out on , the valve be turn on too , and information technology stay in angstrom close position . Once the locomotive engine crosses group A certain temperature threshold , the EGR valve opens and lets the exhaust gases combine with the air-fuel mixture in the combustion chamber . When the engine is turned off , the EGR valve ending too . Now , Associate in Nursing EGR valve force out go bad in two path . It could either fail to open , or information technology could fail to close . Here comprise the symptom of a incorrect EGR valve according to the manner of unsuccessful person . ### IF THE EGR VALVE FAILS TO CLOSE
This will let in exhaust gases to the intake manifold continuously. The effects include the following:
IF THE EGR VALVE FAILS TO OPEN
This blocks the exhaust gases from reaching the intake manifold. Here are some effect of this symptom : observe that in both case , your Check Engine light leave atomic number 4 along . In whatever typeface , the above symptom English hawthorn non necessarily represent due to a incorrect EGR valve . But it does not hurt to be sure . If you discover such symptom in your car , it is best to take it to the mechanic to be chequer out and repaired if necessary .
