Question about 2003 Mazda Protege

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Hi. My check engine light came on and I used my OBD II tester to diagnose the problem and the code from the car's computer says, EGR flow insuffient, would the problem be caused by an fault hose or the EGR valve itelf. I drive a 2003 Mazda Protege, 2.0 litre engine, 5 speed transmission.

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Yes a hose not connected will cause a malfuncition light but the egr can also get plugged

Posted on Mar 13, 2011

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I have a 0402 fault code on my 16 hid xsara what does that mean?


OBD II Fault Code
  • OBD II P0402
Fault Code Definition
  • Excessive EGR Flow
Symptoms
  • Check Engine Light will illuminate
  • In most cases, there are no adverse conditions noticed by the driver
  • In some cases, there may be performance problems, such as dying at stop signs or rough idling, hesitation, misfires or lack of power (especially during acceleration), and a decrease in fuel economy
Common Problems That Trigger the P0402 Code
  • Excessive Vacuum signal or Electrical signal to the EGR Valve
  • The EGR Valve is defective and is opening too far or not properly closing
  • Lack of proper EGR system feedback to the computer from the:
    • Manifold Absolute Pressure Sensor (MAP)
    • EGR Temperature Sensor
Common Misdiagnoses
  • Ignition System
  • Fuel System
  • Oxygen Sensor
  • EGR Valve

Oct 31, 2016 | Cars & Trucks

1 Answer

Starts up but runs rough, exhaust smells, and when you give it gas it wants to shut off.


How To Fix P0300 random misfire codes in your car ...

? 2:56
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Feb 5, 2010 - Uploaded by Scotty Kilmer
Scotty Kilmer, mechanic for the last 46 years and counting, shows how to fix your car if the check engine light ...

P0300 - OBD-II Trouble Code - RepairPal

repairpal.com > Encyclopedia > OBD II Codes
OBD II Fault Code. OBD II P0300. Fault Code Definition. Random, Multiple MisfireDetected. Symptoms. Check Engine Light flashing; Rough running, hesitation ...

P0300 - Check Engine Light Diagnostic Trouble Code ...

https://www.engine-light-help.com/P0300-check-engine-light.html
The misfire detection monitor, a software strategy built into the computer, is designed to detect an engine misfire. The computer can also normally identify the ...

Random-Misfire Page

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Jan 24, 2016 | Cars & Trucks

2 Answers

P0401 error code


Depending on your Year and Model, there are some more prone to this Code than others because of the material used in the intake manifold. Ford and its affiliates switched from Aluminum to Plastic to prevent sooting.

On the old style 4.6L a passage under the Airhorn would clog and prevent EGR flow. Bad EGR flow is a Code 401. It can be a Solenoid valve failing to open, but many times it is a clogged passage as I mentioned. Sometimes a bad EGR has a ruptured diaphragm which can be checked by drawing the Vacuum out of it.

For those engines a simple $10 gasket and removal of 8 screws will allow you to scrape out the valley the passage is in.

So this fix is not real expensive, get parts at common autoparts stores.

Apr 06, 2013 | Ford F-150 Cars & Trucks

2 Answers

Check engine light code P0401 98 Ford expedition


OBD-II Trouble Code P0401 - Insufficient EGR Flow

EGR stands for Exhaust Gas Recirculation. It is part of the vehicle emmissions system, and is used to reduce combustion temperature and pressure to control Oxides of Nitrogen. There are generally three parts to the EGR system: the EGR valve, an actuator solenoid, and a differential pressure sensor EGR (DPFE). These things work together to deliver the correct amount of recirculation based on engine temperature, load, etc. The P0401 code means that OBD detected an insufficient amount of EGR. You may notice drivability problems such as pinging (a.k.a. pre-ignition knock) when the engine is under load or the vehicle is at higher speeds. There may also be other symptoms.

A code P0401 most likely means one or more of the following has happened:
The DPFE (differential pressure feedback EGR) sensor is faulty and needs to be replaced
There is a blockage in the EGR (tube), most likely carbon buildup
The EGR valve is faulty
The EGR valve may not be opening due to a lack of vaccuum

Check it and keep us updated. Hope this helps (remember to rating this free answer).

Oct 13, 2011 | 1998 Ford Expedition

2 Answers

How to clean a egr valve from a 2000 mitsubishi montero. I replace the egr valve, but still engine ligth code 403 still on.


Your new EGR valve (assuming it wasn't defective out of the box), is fine, but the car's computer just needs to have its code 403 cleared. Even though you've corrected the problem, the computer will still light the "Check Engine" light, and store code 403 until the code is cleared using an OBD-II (On-Board Diagnostics 2) code scanner.
Note that the car will function perfectly with its new EGR valve, a lit "Check Engine" light and a code 403 stored. Its just a good idea to clear the code, so that then only NEW problems will become the reason that the "Check Engine" light gets lit.

Jul 23, 2011 | 2000 Mitsubishi Montero Sport

1 Answer

I got a code P040 on my 2003 corolla toyota corolla. My check engine light is on. so what does all this mean?


P0401 OBD-II Trouble Code
Insufficient EGR Flow

What does that mean?
EGR stands for Exhaust Gas Recirculation. It is part of the vehicle emmissions system, and is used to reduce combustion temperature and pressure to control Oxides of Nitrogen. There are generally three parts to the EGR system: the EGR valve, an actuator solenoid, and a differential pressure sensor (DPF). These things work together to deliver the correct amount of recirculation based on engine temperature, load, etc. The P0401 code means that OBD detected an insufficient amount of EGR.

Sep 19, 2010 | Toyota Corolla Cars & Trucks

3 Answers

CODE P0401 COMEING UP


I had an OBD II 401 code and fixed it by cleaning out the EGR vacuum line in the intake manifold. I removed teh EGR Valve and the set screw below it. i used a rifle cleaning brush and one length of the rod. Then I replaced teh set screw. I started teh engind and let the vacuum **** some carb cleaner through the front port hole. when it was sucking good I replaced teh EGR valve and reset the codes. That fixed it.8_26_2012_9_39_13_pm.jpg

Feb 12, 2010 | 1999 Isuzu Rodeo

1 Answer

Service engine light comes on


This GM's definition of this code:
P1404 - Exhaust Gas Recirculation (EGR) Closed Position Performance
The most common reasons are either the EGR valve position sensor is defective, or the EGR valve is not fully closed due to carbon.

Dec 23, 2008 | 2001 Pontiac Grand Am SE

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