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.
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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