Question about 2013 Ford C-Max Energi
Per this document www.fordservicecontent.com/ford_content/catalog/motorcraft/OBDSM1700_HEV.pdf the code means:
P04EF - EVAP System Very Small Leak Detected - Fresh Air Side.
IMHO "usually" due to dirt in seal/poor design of cap-less fuel filler port.
Posted on Sep 11, 2017
What model of Ford? With that I can tell you.
Posted on Jun 18, 2014
A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
This code refers to the Delta Pressure Feedback EGR(DPFE) sensor voltage. The voltage in this sensor changes as it detects a difference in vacuum. Test: Engine running, so be careful and use proper care! Find the EGR valve and disconnect the vacuum line going to the top of the valve. There should be no vacuum there at this time. If there is then check for proper EVR (EGR vacuum regulator) operation and vacuum line routing. These lines could be broken, cracked or plugged. I have run across many EGR passages in the intake manifold that become plugged with carbon and prevent EGR flow, check this by removing the throttle housing that the EGR valve is bolted to and look at the passages, clean if neccessary, reset Check engine light and see if it comes back on after operation. Hope this helps, let me know.
Posted on Jul 01, 2010
Tips for a great answer:
Sep 19, 2015 | Ford Cars & Trucks
Jun 22, 2014 | 1999 Ford Windstar
Sep 16, 2013 | 1998 Chevrolet K1500
Mar 01, 2012 | 1997 Ford Taurus
Nov 25, 2017 | 2005 Dodge Stratus
Apr 21, 2011 | 1999 Ford Ranger SuperCab
506 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: