Having problems with your 2001 Mercury Sable ?

This is the code number after testing for the check engine light P0401. Also , the exhaust gas recirculation flow is insufficient.

Posted / edited by AnonymousUser on : 16-07-2018

Answers :

More than likely you have a faulty EGR Valve Pressure Sensor, especially if your EGR Valve Pressure Sensor is the original metal type. The new sensor is made of plastic and doesn't corrode like the old design. This sensor is located on the Intake Manifold.

pctech1_40.jpg

Here is the sensor: http://www.autozone.com/autozone/parts/2001-Mercury-Sable/EGR-Valve-Pressure-Sensor/_/N-jfkhrZ93y2i

It is also possible that the EGR Valve has a clogged port, but this is less likely.
Yes, the definition of the code P0401 is: "exhaust gas recirculation--insufficient flow detected."

This means the Exhaust Gas Recirculation (EGR) valve is not working properly. The electrical wiring leading up to this valve could be faulty. If there is a vacuum line to this valve, the line could be disconnected, or cracked. The valve itself may be faulty (electric coil problem or vacuum diaphragm leak) or choked with carbon deposits and need to be cleaned. The passages in the cylinder head that lead to this valve could be choked with carbon deposits and need to be cleaned.
Repair Help & Product Troubleshooting for 2001 Mercury Sable

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