Diff. Pressure Sensor

mustanggt3685 · Jan 27, 2006

Hey guys...I keep getting a P1405 code thrown from the computer...so I guess it is a Differential pressure sensor failure. Where is that at? I hear it is an easy fix but I honestly have no clue where to start looking. Thanks!:SNSign:

sgarlic · Jan 28, 2006

P1405 - DPF EGR Sensor - Upstream Hose Off or Plugged

Description:

While driving, the EGR monitor commands the EGR valve closed and checks the differential pressure across the EGR orifice. The test fails when the signal from the DPF EGR sensor indicates EGR flow is in the negative direction.

Possible causes:

Upstream hose disconnected

Upstream hose is plugged (ice)

Plugged or damaged EGR tube

Look for signs of water or icing in hose. Verify hose connection and routing (no excessive dips)

Verify DPF EGR sensor proper mounting and function (view DPF EGR PID while applying and releasing vacuum directly to sensor with a hand pump)

Pearl02 · Jan 28, 2006

I think it on the drivers side near the firewall. It's a black box with two different size hoses connected to it. These things go bad because exhaust gases flows thru it and condensation corrodes the insides of the sensor. It's pretty easy to test if you have a volt meter and a vacuum gauge. I had the same problem with my Mazda B4000. Follow what Sgarlic has stated. You can also do a search on the internet about checking it. Pearl02.

COramprat · Jan 28, 2006

It's a rectangular shaped piece near the EGR...mine was aluminum in color.

mustanggt3685 · Jan 28, 2006

Yeah when I did the PI intake I had to delete the water pump hose that runs into the heater core. Well not delete technically, but I took the old hose out and I ran a piece of thick tubing to the heater core from the water pump. I know I know ford makes the part to fix that, but I am cheap and impatient. WOuld that have anything to do with it?

Pearl02 · Jan 29, 2006

coramprat said:
It's a rectangular shaped piece near the EGR...mine was aluminum in color.

Yea, they use to be aluminum in color. I believe Ford changed the old aluminum cases. When you buy a new one, it'll be black. Pearl02.

Diff. Pressure Sensor

mustanggt3685

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sgarlic

Pearl02

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COramprat

...I can take it. I think.

mustanggt3685

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Pearl02

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Diff. Pressure Sensor

mustanggt3685

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...I can take it. I think.

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