Can a bad EGR cause stalling?
A Bad (EGR) Valve An (EGR) valve that fails to close at idle, is another common cause of stalling. This can make the engine idle rough, misfire and/or stall. Inspecting and cleaning the (EGR) valve and the (EGR) port in the intake manifold; should cure the problem.
How can I check if my EGR valve is OK?
A quick way to check for this is to apply vacuum to the EGR valve and monitor engine operation. Assuming the EGR valve is ok the engine should begin to stumble and possibly even stall as vacuum is applied to the valve and the pintle opens. Your DPFE voltage should also approach 4.5 volts.
Why is there an EGR code on my Ford?
However, we often find EGR codes on Ford products caused by inexpensive plastic parts that falsely report position to the control module. Several technical service bulletins for a wide variety of different makes and models have documented different problems associated with the EGR valve system.
Why does my engine stall when the EGR is open?
This is because the temperature is lower so fuel does not burn at the optimal temperature and as a result is less efficient. Stalling when the engine idles like a rough idle is usually caused when the EGR valve is permanently open and is constantly letting exhaust gases into the EGR system.
What does the EGR error code p0401 mean?
In the shop’s defense, replacing your EGR valve probably would eliminate the error code, turn off the CEL, and allow you to pass emissions inspection. One thing is certain: the P0401 error code specifically means you have “reduced flow” in your exhaust gas recirculation system.
A quick way to check for this is to apply vacuum to the EGR valve and monitor engine operation. Assuming the EGR valve is ok the engine should begin to stumble and possibly even stall as vacuum is applied to the valve and the pintle opens. Your DPFE voltage should also approach 4.5 volts.
However, we often find EGR codes on Ford products caused by inexpensive plastic parts that falsely report position to the control module. Several technical service bulletins for a wide variety of different makes and models have documented different problems associated with the EGR valve system.
What is the diagnostic code for a Honda check engine light?
Refer to our Generic OBD II code list for definitions on all other Honda diagnostic trouble codes. P1201 Cylinder 1 Misfire – Compare possible causes/symptoms for this Honda check engine light code to the Generic OBD II code P0301
What causes a rough idle with an EGR valve?
Rough idle. One of the most common symptoms of a problem with the vehicle’s EGR valve is a rough idle. It is not uncommon for EGR valves to malfunction and become stuck in the open position. This can lead to exhaust gas recirculation to occur causing a rough idle even when the conditions are not desirable.