Error code help P0404 and P1335 - Diesel Forum - TheDieselStop.com
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6.0L Power Stroke Engine and Drivetrain Discussion of the 6.0L Power Stroke diesel engine and drivetrain in the 2003-Up Super Duties and Excursions. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 6.0L Power Stroke engine.

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Old 04-17-2008, 10:37 PM   #1 (permalink)
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Error code help P0404 and P1335

I have a 2007 F250 with the 6.0 that has given me a few troubles. Initially my fan clutch locked up at about 10,000 miles. Next I had an oil leak, which required a bed plate seal replacement at about 15,000 miles. Last weekend pulling my trailer I noticed my engine light come on. The truck ran well and I did not notice anything unusual. I received error codes P0404 and P1335, the truck has less than 16,000 miles. I would like to know if this might be something I might be able to take care of myself, before I take it back to the dealer for warranty work. Appreciate the help......
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Old 04-17-2008, 10:58 PM   #2 (permalink)
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Here are the code definitions:
DTC P0404 Exhaust Gas Recirculation (EGR) Open Position
P1335 has something to do with the crankshaft position sensor.

My guess is your going to have to clean/replace your egr valve, not sure about the crankshaft code though, maybe the sensor is bad.
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Old 04-17-2008, 11:57 PM   #3 (permalink)
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P1335

EGR Position Sensor Minimum Stop Performance.

Fault sets when the EGRP closed position exceeds the maximum limit at initial key on.


P0404

Faulty EGR sensor, valve, or PCM integrity of EGR Position circuit
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Old 04-18-2008, 05:40 PM   #4 (permalink)
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thanks

Thanks for the helpful information guys. I will probably take the truck back the dealer for the warranty work.
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Old 04-19-2008, 12:43 AM   #5 (permalink)
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Stuck open EGR valve causing P1335 and P0404. They will put an EGR valve in it and hopefully you will get a certified stock one or get lucky and get a good one.
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Old 04-19-2008, 02:51 AM   #6 (permalink)
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Quote:
Originally Posted by Gofasterdammit View Post
Stuck open EGR valve causing P1335 and P0404. They will put an EGR valve in it and hopefully you will get a certified stock one or get lucky and get a good one.
gofaster .........
What is a "certified stock EGR valve"? Also, are many of these valves bad right out of the box? I am at 30,000 miles and just changed my EGR valve out as a preventative measure. No signs of problems - just nothing better to do I guess. I had seen posts of folks w/ clogged valves and intake manifolds at low mileages so I was curious. Mine turned out to be pretty bad - glad it is cleaned up (for now).

I have updated all the computer strategies, installed a ccv filter, see no oil consumption, use good fuel and a fuel additive, I will idle less next winter. My mpg has been 18 since the computer flashes - so it has been running great. What else can be done to keep this system clean?? Clearly the ultimate solution is to eliminate it, but until I get my SCT, I will approach it from the more conventional side................
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Old 04-19-2008, 03:45 AM   #7 (permalink)
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There have been some.......... "concerns" with the current crop of EGR valves. Not sure what the problem is but I feel confident saying that it is a supplier problem.

Where a bigger concern exists.... In my world, I cannot replace an EGR valve without a definite, measurable reason for doing so.... If I am sure the EGR is my problem and replacing the EGR doesn't cure it... I can feel confident in installing another EGR. If, however, a DIYer installs a faulty valve and doesn't or can't perform the required tests.. this could lead to a lot of unnecessary experimental parts costs....
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Old 04-19-2008, 09:12 AM   #8 (permalink)
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Is there a way for a DIY to get "certified stock"?
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Old 04-20-2008, 12:22 AM   #9 (permalink)
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I would not replace your EGR valve as "maintaince", if there aren't any problems, dont replace it. There is a bad batch of EGR valves floating around, probably for about a month now. It's not a Ford problem but a Delphi (makes the valve) and Navistar problem. I had to replace the EGR valve four times on an ambulance because they would fail testing while hot. After contacting Ford I was contacted by Navistar and was shipped a certified stock, known good EGR valve. I don't think there is any way for a DIY'er to get a certified stock EGR valve. The problem vehicle has to be at a Ford dealer, being worked on by Ford technicians, and the vehicle itself has to be an emergency (Fire, EMS, Police) type vehicle that has to be on the road.
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Old 04-20-2008, 12:31 AM   #10 (permalink)
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Thanks .................... too late for this DIY-er , but thanks! Just hope I got lucky!
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Old 04-24-2008, 05:37 PM   #11 (permalink)
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bismic does your cel go off,I have the same problem but mine will go out after a day or so of not towing and will never come on untill i tow again and i have to be in the hills where it is pulling hard and maxing the boost.
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Old 04-24-2008, 05:47 PM   #12 (permalink)
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I never had a CEL go off. I really had no performance issues at all. I was just curious as to what the EGR system would look like and when I removed the valve, I saw that it was heading towards a mess that would more than likely cause my EGR valve to stick and eventually be in the wrong position.

Because of this, I am very glad I routed my ccv through a filter.
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Old 04-24-2008, 06:07 PM   #13 (permalink)
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Quote:
Is there a way for a DIY to get "certified stock"?
Tack weld the valve shut and ignore the ck eng light...
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