Question about Ford Contour

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Code definition: EGR valve has excessive circulation. Do I change the valve? Awaiting your reply. Thanks.

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No - don't change the valve. The code usually means that the DPFE (Digital Pressure Feedback EGR) sensor is indicating EGR flow when the computer is not commanding it. If you look at the EGR value on a scan tool at idle, it will read high and not change much when the EGR is manually opened. This problem is almost ALWAYS the DPFE sensor. Buy one from Ford. The aftermarket ones are junk and don't hold up. You can spend $60 on the part or you can spend $100 on the diagnosis to find out what's wrong. It's worth it to try the part in this case. You will need to clear the code. You should be able to disconnect the battery cables for 30 minutes to clear the code.

Posted on Aug 02, 2010

Testimonial: "Thank u very much,, the valve is very difficult to remove anyway with little clearance for a wrench. You've saved the day. Thanks FixYa! "

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1 Answer

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

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Suburban error code reads 402


This means the EGR flow is excessive. The valve may be stuck open or another defect is triggering the EGR to open too much.

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1 Answer

P 1401 location


Codes don't have a certain location, a code means a problem has occurred in a system of the electronics of the cars fuel control or emission control system.
P1401 NISSAN - EGR Temperature SensorPossible causes- EGR Temperature Sensor harness is open or shorted
- EGR Temperature Sensor circuit poor electrical connection
- Faulty EGR Temperature Sensor
- Malfunction of EGR function, EGRC-BPT valve or EGRC-solenoid valve
- Blocked EGR passages When is the code detected?An excessively low voltage from the Exhaust Gas Recirculation (EGR) temperature sensor is sent to Engine Control Module (ECM) even when engine coolant temperature is low, or an excessively high voltage from the EGR temperature sensor is sent to ECM even when engine coolant temperature is high.
P1401 NISSAN Description The Exhaust Gas Recirculation (EGR) temperature sensor detects temperature changes in the EGR passage way. When the EGR valve opens, hot exhaust gases flow, and the temperature in the passage way changes. The EGR temperature sensor is a thermistor that modifies a voltage signal sent from the Engine Control Module (ECM). This modified signal then returns to the ECM as an input signal. As the temperature increases, EGR temperature sensor resistance decreases.
This sensor is not used to control the engine system. It is used only for the on board diagnosis

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Grand carvan gives p402 code


This is not a cut and dry fault code. This means that more than one thing wrong can set the code in the computers memory. Here is the low down on the P0402 fault code. This is from the OBD2 fault code diagnostic book.

P0402 - Exhaust Gas Recirculation Flow Excessive Detected
Symptoms - Engine Light ON (or Service Engine Soon Warning Light)
- Possible engine hesitation
Possible causes - EGR solenoid valve harness is open or shorted
- EGR solenoid valve circuit poor electrical connection
- EGR volume control valve stuck closed
- Dead (Weak) battery
- Faulty EGR temperature sensor and circuit
- Faulty EGR Valve
- EGR passage clogged
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PO402 trouble code....how is this repaired


Exhaust gas recirculation flow excessive. First things to check is your vacuum hoses to egr position sensor (Dpfe sensor) Egr solenoid & egr valve. If they are off, melted or sucked in they need to be replaced. Usually a specific code will be set for that but not always. Of the three the dpfe sensor also known as egr position sensor is the most common & easiest to replace. Next in order is the egr solenoid. Lastly if it comes to changing egr valve make sure to clean all carbon build up in cavity that egr mounts to. They commonly plug up.

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1 Answer

Fault code 402 have changed egr valve exh pressure sensor & egr solenoid nothing helps


po402--egr flow excessive, maybe carbon has built up in egr opening in engine!! or curcuit to egr valve is bad.

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Code p0400 keeps coming up after changing the egr valve and sol.


It may be that the passage to the exhaust is blocked also.

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Yes they have! I have changed many ;)

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1 Answer

Egr flow excessive


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