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I had ford taurus 1997 with 3.0 engine my check engine lite is on dtc p0402 egr code wath i nee d to repair and wath kind the parts i need to buy 3.0 engine 1997

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  • leonel alvarado Mar 27, 2011

    thanks this that anwer that i need

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  • Ford Master
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Hi, P0402 indicates the flow sensor is seeing excessige EGR flow. There can be a few reasons for this.
1. The hoses to the sensor are clogged or leaking
2. The EGR valve has failed open or not closing properly/jammed
3. The sensor has failed

Unless you want to buy all new parts (new valve is $50, new sensor is another $50), the above items must be checked out to determine what if any parts are needed for the repair. The parts involved are shown in the picture below. I recommend you remove the hoses to the sensor and check them for blockage and/or leaks. Also remove the egr valve and look into the port to see if it is closed. If not closed or dirty, clean out the valve with carburetor cleaner and see if it will close by default. If not, replace the valve.
If the hoses and valve are OK, I would test the sensor. You would need an voltmeter to run the test below. Please let me know if you have any questions, and thanks for using FixYa.

  1. Disconnect the pressure hoses at the DPFE sensor.
  2. Connect a hand vacuum pump to the downstream pickup marked REF on the sensor.
  3. Using a multimeter, backprobe the SIG RTN circuit at the DPFE connector.
  4. With the ignition ON , voltage should be 0.20-0.70 volts.
  5. Apply 8-9 in. Hg of vacuum to the sensor. Voltage should be greater than 4 volts.
  6. Quickly release the vacuum from the sensor. Voltage should drop to less than 1 volt in 3 seconds.
  7. If the sensor does not respond as specified, check the power and ground circuits.
  8. If power and ground circuits are functional, the sensor is faulty.

i had ford taurus 1997 - jturcotte_1329.gifjturcotte_1330.gif

Posted on Mar 26, 2011

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Posted on Jan 02, 2017

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P0402 1997 Toyota Camry 4 cyclinder 4 door, encountered P0402 has 3 months already. The car is drivable. What is the solution? Could replacement of a vsv value resolve this issue? Which part can I buy


Hi,
That is the code for Exhaust Gas Recirculation Flow (EGR) Excessive Detected

Read more at: http://www.obd-codes.com/p0402
Copyright OBD-Codes.com

Go to the site and review what causes and can be checked to fix it.

I'd start w/cleaning the EGR valve - free fix - and then consider replacing the part. I'd look for USED parts @ a local Salvage/Wrecking yard vs. buying new, due the cost and the fact that this is an older car.

GL,
TD

Mar 14, 2014 | Toyota Cars & Trucks

1 Answer

402 code emision light on


Hi there:

DTC P0402 - Exhaust Gas Recirculation Flow (EGR) Excessive Detected

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 P0402 code means that OBD detected an excessive amount of EGR.


Symptoms

You may notice drivability problems such as the engine may surge off idle. There may also be other symptoms.


Causes

A code P0402 most likely means one or more of the following has happened:

  • The DPFE (differential pressure) sensor is faulty and needs to be replaced
  • There is a blockage in the EGR (most likely carbon buildup)
  • The EGR valve is faulty
  • The EGR valve may not be opening due to a lack of vaccuum

Possible Solutions

With a P0402, it is common for people to replace the EGR valve, only to have the problem return. The most likely solution is to replace the DPFE sensor.

  • Check the voltage at the DPFE sensor both at idle and when the EGR is open
  • Replace the DPFE sensor


Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day.

Aug 16, 2012 | Toyota Cars & Trucks

1 Answer

2001 Ford Taurus check eng light on with a DTC P0402.This happens about every 2.5 years and I replace the Backpressure sensor and that will take care of it. Is this normal on this year? We brought it new...


DTC P0402: Excessive Exhaust Gas Recirculation Flow detected
Probable cause:
  1. Sensor or solenoid faulty
  2. Connector terminal contact damaged or corroded
  3. Wire harness fault. Check for correct voltage, open, short to ground or short to voltage
  4. Update control unit software - Check for the latest control unit update
  5. PCM or ECM faulty
  6. Exhaust leaks or restrictions
  7. EGR components clogged, dirty or leaky
  8. EGR valve damaged/defective

Jul 03, 2017 | Ford Taurus Cars & Trucks

1 Answer

I have a 1997 ford Taurus 3.0 v 6 the check engine light is on My scanner shows a po401 low flow egr what is the most commed fix.


EGR Valve

You can print all codes from
PO-011 thru PO804 on www.engine-
light-help.com/generic

Remember every vehicle has MFG
Specific Codes that aren't easy to find
and you will need them also

Feb 04, 2011 | 1997 Ford Taurus

3 Answers

96 ford explorer failed emissions test with codes p0401,p0402,p0755,p0756


P0401
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.

P0402
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 P0402 code means that OBD detected an excessive amount of EGR.

There sound like a bad EGR and need replace it.

P0755 Shift Solenoid B Malfunction and P0756 Shift Solenoid B Performance or Stuck Off. First I suggtes check leve fluids and preventive maintenance.

Tell us news.

Sep 02, 2010 | Ford Explorer Cars & Trucks

2 Answers

Service engine code P0402 for Ford Mustang


P0402 OBD-II Trouble Code - Exhaust Gas Recirculation Flow (EGR) Excessive Detected

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 P0402 code means that OBD detected an excessive amount of EGR.

Symptoms
You may notice drivability problems such as the engine may surge off idle. There may also be other symptoms.

Causes
A code P0402 most likely means one or more of the following has happened:
* The DPFE (differential pressure) sensor is faulty and needs to be replaced
* There is a blockage in the EGR (most likely carbon buildup)
* The EGR valve is faulty
* The EGR valve may not be opening due to a lack of vaccuum

Possible Solutions
With a P0402, it is common for people to replace the EGR valve, only to have the problem return. The most likely solution is to replace the DPFE sensor.
* Check the voltage at the DPFE sensor both at idle and when the EGR is open
* Replace the DPFE sensor

Hope helps (remember rated and comment this).

May 27, 2010 | 2001 Ford Mustang

1 Answer

Problem with my vehicle


You need to replace the dpfe sensor this will fix it.

Jul 10, 2008 | 2001 Ford Taurus

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