P139C Code

[emesel]

I'm getting a P139C code with rough engine at low speeds. When I looked it up it says cracked hose or failed valve. Should I just assume it's the valve and replace it? Is it important to get OEM, or is something from Autozone ok (I usually buy OEM for things like brakes, etc)? Is it ok to drive in the meantime?
Thanks, Mark

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[RangerBill]

I'm getting a P139C code with rough engine at low speeds. When I looked it up it says cracked hose or failed valve. Should I just assume it's the valve and replace it? Is it important to get OEM, or is something from Autozone ok (I usually buy OEM for things like brakes, etc)? Is it ok to drive in the meantime?
Thanks, Mark

From the shop manual:

P139C - EGR Sensor C Downstream Hose Off Or Plugged

Description: At idle, the exhaust gas recirculation (EGR) monitor commands the EGR valve closed and checks the differential pressure across the EGR tube orifice which should be zero to indicate the hoses are connected and not restricted. This DTC sets when the differential pressure indicated by the sensor exceeds a maximum threshold or falls below a minimum threshold. Possible Causes:

• The downstream hose is disconnected
• The downstream hose is restricted
• Restricted or damaged EGR tube

Diagnostic Aids: Look for signs of water or icing in the hose. Verify the hose connection and routing. Check the differential pressure feedback EGR sensor for correct mounting and function.

Check for the proper connection of the hoses to the EGR DPFE sensor. It could be a bad EGR DFPE sensor. It is about $20 at RockAuto.
The Standard Motor Products is the OEM manufacturer.
https://www.rockauto.com/en/catalog...sion,egr+pressure+feedback+(dpfe)+sensor,5088

Here is a thread on the replacement procedure:
https://www.ranger5g.com/forum/thre...mbly-replacement-write-up-lb5z-9j433-b.29247/

 

[emesel]

Thanks RangerBill!
I just bought from Rock Auto; I don't know why I frequently forget about them.
An FYI, I checked a discounted online OEM Ford source: it was $132 discounted from around $200, which included bracket, hoses and clamps, but, still really expensive.
Thanks again, Mark

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