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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Posted on Jan 02, 2017

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  • 2 Answers

SOURCE: error code on 2001 sable P0304 and P0430

Replace the Oxygen sensor

Posted on Feb 24, 2009

SOURCE: i have a 2000 mercury

Vacuum leak at intake manifold,vacuum leak
at injector "o"-ring,valve issues

Posted on Jun 27, 2011

greg_margo
  • 1959 Answers

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

nicole99wu
  • 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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PO401 Insufficient EGR Flow, valve could be stuck or disconected.

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.

Hope this help to solve it (remember comment and rated this).

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Ok this is a pretty inexpensive problem if you have some basic mechanical skills, and tools. The 0401 code is usually triggered by the egr valve sticking open, or carbon deposits clogging the port into the intake. This acts like a vacuum leak and causes a random misfire situation. Go to your autoparts store and buy an egr valve gasket and a throttle body gasket. Remove the egr vlave and inspect the pintle (the plunger dealie inside there) push it in several times with a small screwdriver and check for sticking. If it appears to be sticking, scrape out what carbon you can and if it has a torx indention in the pintle insert a torx driver of appropriate sixe and turn back and forth while pushing in and out on the pintle to clean. use some carb cleaner to finish cleaning and reinstall egr with new gasket. IF it's NOT stuck, all is not lost but it gets a little harder. If the valve shows no signs of sticking, you will then need to remove the throttle body from the intake, try to do this without unplugging any wires if possible. You can then use a piece of wire (coathanger works well) to clear the port between the egr valve port and intake, remember to stuff some shop rags into the intake before cleaning so carbon bits don't get in there. after clearing the port, reassemble with new gaskets and you're good.

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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.
Greg

May 30, 2009 | 2001 Mercury Sable

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