EGR Code,but I would have to see & test
whatever parts are there, in that system
Don't just change things & hope for the best
Codes don't indicate what is wrong or what to do
Have to know how to test individual parts,
they have to fail a test before they get replaced
The code most likely means one or more of the following:
-The DPFE (differential pressure) sensor is faulty and needs replaced
-There is a blockage in the EGR (most likely carbon buildup)
-The EGR valve is faulty
-The EGR may not be opening due to a lack of vacuum
SOURCE: Error code P0402 2001 Ford Escape
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...
if this was a help in any way. Thanks.286 views
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