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What can you check or replace if the check engine light comes back on and the code is P401 and you have already replaced the EGR valve?
Check the EGR selenoid valve. The vacuum will pass throught the defective selenoid valve and go the EGR valve even if it has not been activated. The ECM will not detect a defective selenoid valve - only an EGR problem.DPFE sensorIf it's a Ford product, you may need a DPFE sensor. You should also check for a restriction in the EGR passageway.
Does a faulty EGR Valve effect smog check?
Yes.
Why does your 2001 Tahoe surge?
You need to CHECK the EGR Valve.
Why does your 1993 Chevy S10 Blazer begin to stall when you come to a stop and Once you turned it off it won't start back up?
Check your EGR valve Check EGR valve
1999 cougar check engine came on code was egr you switched out the valve reset the computer it came back on same code is ther something else connected to the egr valve you should also check?
Try the EGR Valve Position (EVP) sensor. Run1
How do you locate a egr valve for a s10?
If you want to locate a new egr valve, check with your local auto parts store. If you want to know where the egr valve is located on your vehicle, post the year and engine size of your S10.
How do you fix gm error code P0401?
p0401 is related to EGR valve flow. Possible bad EGR, check passageway under EGR to see if its plugged See also for the DPFE before changing the EGR Valve.
Will a bad egr valve cause check engine light to come on?
It can.
Egr valve location?
Does a 2000 pontiac gran am 4 cyl. Have an egr valve all that parts stores have is a gasket. Gm says it does not have one. Car shakes and shimmies when you stop at an intersection which everyone says check the EGR valve
Where is the egr valve located on an h22a4?
The EGR valve is located at the front of the h22a4 engine. The EGR valve is right beside of the front of the EGR valve.
Why would a 95 Camry stall at stops but once restarted run fine?
Check the EGR valve. It sounds like your EGR valve is staying open. An EGR valve that is open at idle will cause a car to stall. An EGR should be closed at idle and open when you are driving around.
What does the check engine light mean on a 2003 civic?
it usually means the the EGR valve needs to be replaced. If your car is "bucking" on start up then for sure it is the EGR valve.
