Engine Light On, HELP - EGR Sensor - Engine Light On

[Spartacus310]

My engine light flipped on at 74k miles. Ford app says "detected the egr pressure sensor signal is not as expected when the vehicle is at idle". Think just a sensor is needed. I CANNOT find any videos on how to replace or even where it is.

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[My12SecRanger]

do you have a p0401 code

 

[Spartacus310]

Well, i dont have a code reader nor taken it in but my Ford app came back with this error message

 

[Msfitoy]

My engine light flipped on at 74k miles. Ford app says "detected the egr pressure sensor signal is not as expected when the vehicle is at idle". Think just a sensor is needed. I CANNOT find any videos on how to replace or even where it is.

https://www.ranger5g.com/forum/threads/bucking-surging-epidemic.14581/

I'll save you a little time and recommend you start at page 25, thread #372...

 

[Spartacus310]

Well thank you very much!

 

[Msfitoy]

Well thank you very much!

You're welcome! I had the same bucking problem as many here and that one part finally solved it definitively...

 

[My12SecRanger]

EGR is behind the turbo near firewall on passenger side

 

[Big Blue]

EGR is behind the turbo near firewall on passenger side

Actually the sensor is on the drivers side just ahead of the brake booster.

 

[Msfitoy]

@airline tech has posted many useful diagrams at the threads I linked above...

 

[Amsoil guy]

Mine has just started doing the same thing. Comes off and on periodically. I’ll take it for a good hard run and a fresh tank of fuel and it seems to clear it up for a few months. Truck idles a bit going into work in the mornings because of traffic which triggers the code. Coincidence or not I’m not sure.

 

[SilverXLT6]

None of this is covered under the emissions warranty?

 

[airline tech]

None of this is covered under the emissions warranty?

Technically - yes, but the issue is that the DPFE failure will not always code.
So, for the Dealer - No Code - No Problem
Now if it does code, there is a good chance at key cycle - it will clear, so you have to have it active when the dealer hooks up - FDRS
Thus wasted your Time and still have the issue (Grr) and they will only see it - If they know what PID to look for and monitor during a Live Data Drive. They need to watch what the DPFE sensor is actually reading (EGR Flow) and the position of the (EGR Valve), if it is not coding, they will not look at these PIDs unless they know that (This is a KNOWN) problem and look at these PIDS
Ford does NOT have any SSM or TSB to HIGHLIGHT this issue, so it relies solely on the Experience of the Tech working on it and has he seen this issue before.

The problem appears to be - The DPFE under reports EGR flow, the system reaction is to open the EGR valve more - now you have too much EGR flowing and the engine stumbles at low RPMs when you hit Hi-Way speeds you are overcoming the extra EGR flow, and it is not as noticeable

Now add in - timeline to get into the dealer service bay - sometimes 30 days out, for under a $100 dollar bill and 30 minutes labor - you can cure the issue yourself. Granted it is shot gunning a part at it - which I HATE doing, it does appear to be the fix 99.5 % of the time and the DPFE has a long history of failure and zero codes.
For a true test of the EGR - It requires a Live Data drive and monitor to see what the EGR system is actually doing, if you do not perform this - it's a guessing game with the DPFE sensor being a 99.5 percent (valid fix) the (.5 percent) is the failed guess factor and requires a deep look in the system operation as similar drivability issues from other EGR components or PVC system including air induction and the transmission shifting issues can be the root cause.

 

[dtech]

None of this is covered under the emissions warranty?

No, unless under 2yr/24 k ,some yrs back automakers were allowed to reduce coverage to 2yr/24k miles on many emissions parts , 8 yrs/80k coverage remains on so called major parts like cat, ecu. Most common cel is small vacuum leak in fuel system, some states with emissions tests allow vehicles to pass with this as it can be a costly repair. So makers can and probably have gone cheap on some emission components and not be liable for warranty repair. When emissions standards were tightened yrs back numerous makers relied on expanded use of egr to meet the no standard.

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