Question about 2001 Mercury Sable

1 Answer

Clogged egr tube

I recently did a tune up on my 2001 sable 3.0l v6 after it was dant the check engine light came on giving 0401 code. could it be that i forgot to renove the negetive battery terminal before changing the plugs and wires?

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1 Answer

You have a PO 401 OBD2 Code

Google the code to see what it is & diagnose
the EGR System

There is no need to ever remove battery cables unless the
work you have to do would be safer doing so

Battery Cables & codes are not joined somehow

AFTER you diagnose a problem & AFTER to make the
required repairs & are sure your done,then you can clear ALL data
& road test until 7 of the 8 I/M Monitors run,leaving only the evap
to run days later.

Any time you remove a battery cable, you better know what will happen, or what features you will loose, or are not familiar with how
to restore them

Always use a code reader or scanner to clear DATA,your not clearing codes, your getting rid of valuable data only avail with
professional software

Ask yourself !
The key is off
How would changing plugs & wires be an issue?
How would the PCM know you worked on your car?

Posted on Mar 19, 2014


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SOURCE: error code on 2001 sable P0304 and P0430

Replace the Oxygen sensor

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Vacuum leak at intake manifold,vacuum leak
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Posted on Jun 27, 2011

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SOURCE: Check engine light with codes

P0171 & P0174 indicate Lean burning on banks 1 and 2. The most common cause is a dirty or defective MAF (Mass Air Flow) sensor. Other causes are bad fuel filters or a broken vacuum line.

Posted on Jul 06, 2011

  • 1049 Answers

SOURCE: 1999 mercury sable engine code

for p0401:
In fixing this code, it is quite common for people to just replace the EGR valve only to have the OBD code return. The EGR valve is not always the culprit.
Use a vacuum pump and pull the EGR valve open while monitoring engine RPM's & DPFE voltage. There should be a noticable difference in RPM's with the EGR open.
Clean out the EGR valve and/or tubing to remove deposits.
Check the voltage at the DPFE, compare to specified values (refer to a repair manual for your specific model).
Replace the DPFE sensor (with a good quality / OEM one).
Replace the EGR valve.

Posted on Jul 08, 2011

  • 1 Answer

SOURCE: mercury sable 2001 duratec engine DOHC I get check engine light and diagnostic code PO401". Any suggestions?

Need pic o diagram

Posted on May 14, 2013

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It could very possibly the EGR tubes are clogged or the EGR is not opening or could be DPFE; first i would check the tubes on the DPFE and also clean the EGR tubes and egr it self simple brake clean and a hanger can clean the tubes and spray some in the EGR it also can get gunked up and not move properly.

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Mercury sable 2001 duratec engine DOHC I get check engine light and diagnostic code PO401". Any suggestions?

Barring any vacuum leaks, P0401 is indicative of a bad EGR valve. Hope this answers your question. Best of luck.

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