![]() However manufacturer may have a different definition for the P0401 OBD-II Diagnostic Powertrain (P) Trouble Code. When you check Ford Focus 3 car engine light came on code P0401 the reason should be Low EGR flow control is detected. ![]() Intake Valve Control Solenoid Circuit LowĬrankshaft Position Sensor A Circuit Low Input OBD-II Diagnostic Powertrain (P) Trouble Code For Engine It's good to take care of this right away to improve gas mileage. If you've already made it to the store, you might as well just replace it. Alternately, you can purchase a gas cap for about $3 at an auto parts store.Īll you need to do is take the old one off and screw on the new one. Continue driving and see if the check engine light Pull over, retighten it, and take a look at theĬap to see if it has any cracks in it. When the check engine light comes Ford Focus 3 P0401 code on theįirst you should check is the gas cap.
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