P0404 & P1335 codes
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P0404 & P1335 codes
I have an 06 F250 PSD with about 156k miles on it. check engine light came on last week and got it checked and it threw up the infamous P0404 & the P1335 codes. From the light research I have done one the forum, it looks like I have three options to get this fixed before this can cause further damange.
1 - clean the EGR valve
2 - EGR delete kit
3 - replace the EGR system
Obviously I am not a mechanic so I wanted to ask if there were any other options I dont know about or if these are the only 3 options, which one is best. I want to do what will be best for the truck in the long run. from what i understand this is a fairly common issue with this model year. I would prefer to do a DIY option but if this calls for a more advanced pair of hands, I have no problem going to a mechanic. All in all I know this is a noob thing to ask so please be gentle.
cheers!
1 - clean the EGR valve
2 - EGR delete kit
3 - replace the EGR system
Obviously I am not a mechanic so I wanted to ask if there were any other options I dont know about or if these are the only 3 options, which one is best. I want to do what will be best for the truck in the long run. from what i understand this is a fairly common issue with this model year. I would prefer to do a DIY option but if this calls for a more advanced pair of hands, I have no problem going to a mechanic. All in all I know this is a noob thing to ask so please be gentle.
cheers!
Lead Driver
Joined: Mar 2010
Posts: 5,505
Likes: 257
From: Woodbridge, Ontario, CA
As the former owner of a 2007 6.0, along with being a Ford tech who has wrenched his share of these, I can tell you with almost 100% certainty that your fix will be successful with an EGR valve replacement that's only two 8mm bolts and an electrical connector away from removal and replacement.
The P1335 code alone, means the EGR valve position volts reading is outside of the expected value, which is usually caused by it being jammed open with a piece of hard carbon, and/or the valve position sensor inside the valve has failed. Cleaning the valve is a hit and miss at success for repair, with the greater odd of it being a miss.
The P1335 code alone, means the EGR valve position volts reading is outside of the expected value, which is usually caused by it being jammed open with a piece of hard carbon, and/or the valve position sensor inside the valve has failed. Cleaning the valve is a hit and miss at success for repair, with the greater odd of it being a miss.
Lead Driver
Joined: May 2014
Posts: 6,545
Likes: 14
From: Virginia Beach VA
Coolant flows into the oil cooler first, as that cooler becomes less efficient, hotter and less coolant (based on the reduced coolant flow, cooler gets clogged) is passed to the EGR cooler. It turn, reduced efficiency of the EGR cooler causes the tubes to crack causing a leak of coolant into the intake. Liquid coolant passed to the intake becomes steam and over pressurizes the cylinder, lifting/stretching the heads and head bolts.
Why everybody is obsessed with watching oil to coolant temperatures on these engines. Once the oil cooler becomes clogged, it's a matter of time before the EGR cooler ruptures. Oil cooler could rupture as well and ultimately could lead to head gasket, head bolt failures.
Deleting the EGR cooler would prevent coolant from a ruptured cooler from entering the intake.
Hope this explains the reason of the EGR delete. If your in a state that does not have emissions testing, deleted EGR is the way to go. There are replacements designed to not rupture as well, bunch of delete kits to choose from also, depending on if you choose to keep the cooler or not.
Why everybody is obsessed with watching oil to coolant temperatures on these engines. Once the oil cooler becomes clogged, it's a matter of time before the EGR cooler ruptures. Oil cooler could rupture as well and ultimately could lead to head gasket, head bolt failures.
Deleting the EGR cooler would prevent coolant from a ruptured cooler from entering the intake.
Hope this explains the reason of the EGR delete. If your in a state that does not have emissions testing, deleted EGR is the way to go. There are replacements designed to not rupture as well, bunch of delete kits to choose from also, depending on if you choose to keep the cooler or not.
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