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2008 MAZDA CX7 Exhaust Gas recirculation flow insufficient

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

warlock61
  • 659 Answers

SOURCE: code p0401-exhaust gas recirculation flow insufficient detcted

these vehicles as well as every other Ford vehicle has had problems with the DPFE sensors going bad. Ford had a program for this problem but was limited to time and mileage. You can contact a dealer to see if it still qualifies if not the sensor will need replacement. this is very easy to replace

Posted on Nov 24, 2008

mecanica03
  • 881 Answers

SOURCE: I Have a 1996 Lexus Es300 With Error Code P0401

this not a major problem,its a system that provides a small portion of exhaust gas to intake system to perform power, but no much, try to reset by disconnect the negative battery terminal few minutes

Posted on Apr 18, 2009

badealer888
  • 414 Answers

SOURCE: my 2000 rodeo check engine is on so i hade it

Check the vacuum lines going to egr. An intake cleaning may also help.

Posted on Jun 26, 2009

  • 202 Answers

SOURCE: P0401 Exhaust Gas Recirculation Flow Insufficient

check the metal line that comes off the exhaust and make sure it isnt plugged with carbon. also remove the egr and check the port and see it's clogged as well

Posted on Nov 17, 2009

Mustgo
  • 2359 Answers

SOURCE: SEL code P0401 (2004 Mitsubishi Galant 2.4L)

Check for

vacuum leaks on intake manifold,

the air tube between the air filter.

intake manifold vacuum hose.

===
clean throttle plate with Berryman carburator cleaner

SEE sample picture HERE
===

Also remove carbon built up behind the EGR valve and the EGR passage tube.

===

Vacuum leak WILL offset the intended 14.7 to 1 air fuel ratio.

More un-metered air (leaks) will lean out the fuel mixture.

Use small amount of Berryman carb clearer at potential air leak area will help you identify trouble spot.

At idle,just spray and listen for the RPM surge.

The in-rush of carb clearer will increase the RPM on the motor.

Record the problem spot(s) and address it later.

===

EGR carbon built up require 2+ hours to clean from start to finish.

You will need a new EGR base gasket before your start.

Locate and remove the EGR valve after the vehicle is cool down.

Carefully record the connector and vacuum line (for older vehicle) location by drawing an easily to follow diagram.

Remove the EGR valve.

Inspect the location of the carbon built-up inside the valve and the EGR passage tube.

SOAK these areas with WD-40 spary.

You will need a small screwdriver,cloth hanger and lot of newspaper and time to get this cleaning done right.

RE-SOAK the carbon and let it sit for over-night will also help.

One the last round,pass a shop vacuum of the EGR valve and the passage pipe.

Install the new EGR gasket and connectors.

Allow the vehicle to warm up outdoor to burn up any remaining WD-40.


Take it for a test drive.


Please rate my answer if it's useful to you.


Cheers,

Mustgo

Posted on Dec 19, 2009

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P0401 usually means for most vehicles
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