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Exhaust gas recirculation.
It's designed to reduce the emissions of your exhaust, in your leaded, unleaded or diesel fuel driven vehicles. Exhaust has nitrous oxide in it, and EGR is designed to reduce that nitrous oxide.
P0453 - Evaporative Emission Control System Pressure Sensor High Input
Possible causes- Evaporative Emission System (EVAP) Pressure sensor harness is open or shorted - Evaporative Emission System (EVAP) Pressure sensor circuit poor electrical connection - Faulty Evaporative Emission System (EVAP) Pressure sensor - Damaged fuel tank pressure sensor
looks that your catalytic converter is broken.Before you do anything take it to a qualified mechanic and request for emission test to see whether you do have high emission due to lambda sensor failure or cat. also you can check from your exhaust end if your emissions smell like rotten eggs.If so change cat.
The EGR valve is basically a device that routes some of the exhaust back into the engine to help control nitrous oxide emissions, The valve is turned on/off by the vehicle computer and the computer has noticed that the voltage it is seeing on that circuit is to high indicating a problem with either the switch or the wiring between the switch and computer. Typically it is not in the wiring but a visual check of the wiring condition will help verify that. I would suggest replacing the EGR Valve and then having the code cleared with a scan tool.
The most likely cause of this is a faulty exhuast recirculation system.It is used to cool the combustion process preventing the formation of nitrous oxide emissions. The main building block of acidic rain.Use your emission diagram and locate the EGR valve.You will need specialized equipment to check it. Other than taking it off and checking for blocked passages from carbon build up there is little you can do yourself.