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I did change new EGR valve after my car failed the emission test. Check engine light was on when I was taking for the test and the code reads P0401 Exhaust EGR Flow Insufficient.
check engine light still on after changing the EGR.
Please help me.
 

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Are you sure the egr valve was faulty? They seldom go bad... It could also be a faulty egr solenoid or blocked passages. I’ve had this code on my mitsubishi twice...first time i cleaned all passages on the intake manifold and cleared codes..after a few days it came back again. Did more research and checked the solenoid and found out it’s not working if i apply current directly. Changed solenoid and it’s been three years and no codes yet..
Egr valves can be checked if they are faulty...same with the egr solenoid.
 
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