WHY Melted DPFE Sensor?

[michaelspayth]

I have an 01 Explorer sport....
Hate that I even have to ask something like this but.. what is this? How could this have happened? And how serious is it? Thanks in advance

 

[Lee's Automotive]

I have an 01 Explorer sport....
Hate that I even have to ask something like this but.. what is this? How could this have happened? And how serious is it? Thanks in advance

View attachment 447296

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That's the DPFE sensor and it's very easy to replace

Amazon product ASIN B001BS9K3I

 

[Motorhogman]

easy to replace, but what caused the melt down ?

 

[410Fortune]

Short circuit if some sort!

First time I have ever seen this

You will likely need a new wiring pigtail and new dpfe (differential pressure feedback exhaust gas recirculation)
Check fuses
Clear codes
Install new dpfe and monitor it closely

 

[michaelspayth]

Thanks for the help! Not sure what caused the meltdown or how long it's been like that. I'm under the hood often and would like to think that I would have noticed that if it had been that way for a while. Going to order the replacement part today

 

[Turdle]

I've seen them melted before, egr gas, plastic part. It happens. Inexpensive replacements are sketchy.

Could be a restriction in exhaust, clogged cat. Hope not.

Disconnect battery while you swap it out. That will clear the codes, showing only new ones if any during a drive cycle.

 

[crunchie_frog]

From what I see, the heat came from the exhaust. I would think it could be high exhaust temperature which could be a number of things like exhaust valves not sealing or incomplete combustion and combustion in the exhaust. I guess it could be excessive back pressure as well but there should not be any gas flow but heat would flow. My bet is if you hook it up with a new one you are going to have the issue. I would do a compression test as a starting point and then hook up Forscan and check the O2 readings and fuel trims.