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Apr
P01406 EGR Valve Pintle Position. What I recommend you do is to test for each signal with the connector connected using a wire-piercing probe.
So for this test go to.
How to test a egr valve. Look for a round thick metal disc about three inches in diameter. In most cases youll find it around the top area and to one side of the engine. You may need to look between and under some components on your vehicle.
Also you should see a thin vacuum line connected to the top of the valve. Turn the multimeter on and set the dial to Volts DC Attach the red lead wire to the EGR circuit labeled C There are five circuits on the EGR and each is labeled A-E. For an electric EGR valve you need to have a multimeter.
This device will be used to do a resistance reading referred to as an ohms test Once connected you should see a reading of about 20 to 24 ohms. Test EGR valve in 2003 Ford Expedition with engine code P0401. Andy Phillips shows how to test an EGR Solenoid using various methods.
A manifold absolute pressure MAP sensor is fitted to the intake manifold. The EGR valve and MAP sensor are quite accessible on this particular engine so testing the system was straightforward. After reading the diagnostic fault codes I used an actuator test on the EGR valve.
Car or truck runs fine but the check engine light CEL is on with an EGR Valve Fault Code. P0401 EGR System Flow Insufficient. P01406 EGR Valve Pintle Position.
Really bad gas mileage. Lack of power as you accelerate the vehicle down the road. 1996 F150 300ci shown many other Fords are similar.
This doesnt test every part of the system wiring for example but it does prove to you that your EG. To test these circuits its not necessary to unplug the EGR valves connector. What I recommend you do is to test for each signal with the connector connected using a wire-piercing probe.
Once we have determined that the EGR valve and control valve operate properly with a clean EGR system our next test is to connect a vacuum gauge to the EGR valves vacuum supply tube at the valve. So for this test go to. If the multimeter DID not register 10 to 12 Volts.
The PCM tests the EGR by briefly commanding the EGR full open when you let off the accelerator from 40 to 50 mph. When the EGR valve is blocked error codes of P1404 and P1406 may display on the engine light area. Remove the plug and clean it using the valve cleaning kit to remove blockages.
If you cannot check on your own ask for a mechanics assistance. Bad EGR signs often resemble other issues within the engine system leading to confusion. EGR valve symptoms can vary however the most common symptoms of a faulty EGR valve are explored below.
Your engine has a rough idle A rough idle when starting your vehicle or during brief stops ie. Low engine speeds with a warmed-up engine can be caused when the EGR is constantly open and a continuous flow of exhaust gases goes into the. A clogged or defective EGR valve will trip a Check Engine or Emission Control light on the dashboard.
The owner will have to take his vehicle to a certified test and repair station that has a code scanner OBD. The scanner will then be plugged into the vehicles computer system and a trouble code will be identified.