2001 Ford Escape error code P0402

This video should help diagnose and fix EGR issues.
https://youtu.be/jZmJ54sDWJQ

P0402 Exhaust Gas Recirculation Flow Excessive Detected 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 vacuum
• 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

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).

IF you go to autozone.com and put in your vehicle in a picture of that component will be pictured, My reference material states that a P0402 is EGR excessive flow detected also check for piece of carbon stuck in EGR or pintle sticking.

Sounds like you have a vacuum leak, a problem with the wiring, or a bad PCM. Check wiring for pinched, chafed, pierced, or broken wires. Make sure vacuum supply is good, and not collapsing when the vehicle is running. Beyond that, a trip to the dealer may be in order.

This might sound crazy but it works with these Escapes most of the time. Go buy a can of Seafoam from your part store. With the engine off, disconnect the brake booster vacuum line and place it in the can of sea foam. Start your engine and keep your foot on the gas pedal and keep the RPM's around 2k.The vehicle is going to smoke like crazy for 10 minutes or so, when the smoke clears up for the most part, go drive it for a couple of miles and see if that helps. It cleans out the carbon buildup from you intake and sensors and takes care of that code you getting most of the time. OR, you purge canister needs to be replaced...

code 1402 EGR valve position sensor open or shorted, check the wires going to the sensor and the plug itself,hope this helps if not get back to me and we'll go from there

did you replace the egr valve

yes it is..you need to replace egr valve assembly..make sure you disconnect battery while replacing..some times fault will return even after replacing valve..

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