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Ok we got a 2005 6.0 powerstroke with low power has trouble

codes p0404 and p1408 i...
Ok we got a 2005 6.0 powerstroke with low power has trouble codes p0404 and p1408 i have already installed a good egr valve with nothing changed would really love it if you could help me get this thing back on the road thanks in advance!
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Answered in 20 minutes by:
10/14/2016
Jared D
Jared D, ASE Certified Technician
Category: Ford
Satisfied Customers: 1,983
Experience: Shop Supervisor at County Fleet
Verified

Those two codes still point to a bad EGR. Are you getting a lot of black smoke?

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Customer reply replied 1 year ago
Nah not really i lil bit of white

A bad EGR usually blows black smoke. When you replaced the EGR what brand was used?

Was anything else replaced or cleaned out at the same time?

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Customer reply replied 1 year ago
I took it out of another truck that is running good and no nothin els was replaced or cleaned just a new air filter

It sounds like the EGR is faulty or the passages underneath are clogged up.

If you have a scan tool you can look at the following and know for sure:

Check the Exhaust Gas Recirculation valve position (EGRVP) voltage on the scanner Key On Engine Off (KOEO). It should read about 0.8v. If the voltage is abnormally high, remove the valve and clean any carbon from it and from inside the intake manifold. Reassemble and re-check operation. If the voltage is still incorrect or the valve will not close even after cleaning the carbon, replace the valve and re-check operation.

If the drivability and trouble codes are still present after cleaning the valve, monitor the EGRVP voltage along with the EGR command on the scanner. If the valve is opening when not commanded, again suspect a faulty EGR valve.

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Customer reply replied 1 year ago
The egrvp voltage is 0.82 this is fine?

That's pretty normal. Maybe a little clogged.

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Customer reply replied 1 year ago
Ok new valve same thing but i noticed it looks wet down in the verry bottom just all the soot looks shining and damp could the cooler be busted causing this problem and thies codes or wiring to the valve thanks in advance
Customer reply replied 1 year ago
Idk
Customer reply replied 1 year ago
Sorry ignore that last post

If it's wet down in the bottom then the EGR cooler is leaking.

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Customer reply replied 1 year ago
but is that the low power and would that cause the EGR codes even with the new egr valve i get the same codes

I've only seen a leaking EGR cooler throw codes a couple of times. Most of the time it just makes low power and white smoke. The engine sucks the coolant in and burns it causing it to run really poorly.

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Jared D
Jared D, ASE Certified Technician
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Satisfied Customers: 1,983
Experience: Shop Supervisor at County Fleet
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