'04 F150, code P0430
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'04 F150, code P0430
This is from a 2004 ford f150 5.4L 4x4 new body style.
please look at the photos I took of the code scanner. Is there something that tells wheather the cats are working correctly or the COPs?
I have read some other posts listing this same code-
one replaced the cats and all was good, the other replaced the COPs and all was good.
please look at the photos I took of the code scanner. Is there something that tells wheather the cats are working correctly or the COPs?
I have read some other posts listing this same code-
one replaced the cats and all was good, the other replaced the COPs and all was good.
Cross-Country
Joined: Dec 2005
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From: Lexington, SC
jentkent5454
What are your symptoms? Did you just throw the code or do you have a misfire? How many miles on truck? Have you ever had any misfire issues, injector issues? Based on the limited info posted I am pretty sure that you would be throwing a P300 or P301-P308 if it was a COP. If you just threw the code, with no running issues? It could just be a O2 sensor. You have two O2 sensors on both banks one in front of and one behind each Cat. The difference between the two is how your "efficiency" is measured. If it's reading out of bounds I would first check the o2 sensor and then the cat. I think the only way to check the cat is to drop it and visuallly inspect the inside. I am only a shade tree but that is the path I would take. Good Luck and Post what you find out. Shawn
What are your symptoms? Did you just throw the code or do you have a misfire? How many miles on truck? Have you ever had any misfire issues, injector issues? Based on the limited info posted I am pretty sure that you would be throwing a P300 or P301-P308 if it was a COP. If you just threw the code, with no running issues? It could just be a O2 sensor. You have two O2 sensors on both banks one in front of and one behind each Cat. The difference between the two is how your "efficiency" is measured. If it's reading out of bounds I would first check the o2 sensor and then the cat. I think the only way to check the cat is to drop it and visuallly inspect the inside. I am only a shade tree but that is the path I would take. Good Luck and Post what you find out. Shawn
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Well I don't have the history on the truck, I just purchased it about a month ago. It has about 130,000 miles. I have replaced both o2 sensors after the cat. The code will come on and a few days later it will go off. Wait a week or so and it will come back on. It is the only code it throws. The truck does run a little rougher than I like. But I can't say it's def a misfire.
Cross-Country
Joined: Dec 2005
Posts: 97
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From: Lexington, SC
Congrats on the new truck! I went from 98' to an 06' love the 98' but man what a difference. Does your truck idle rough? When you step on it as in getting on the highway is your accelleration smooth, does it hiccup ever so slightly. I wonder if you know if the plugs have been replaced? You can have a misfire for quite sometime before it throws a misfire code usually the P300 or P301-P308, you know this from your 98 i am sure. If it's bad enough for you to chase it, not just the CEL, I would do fuel filter, plugs- maybe boots and COPS, and possibly a real injector cleaning. Not knowing the history, these items will eliminate a lot of possibilities and you will know your truck is ready for that long trip or whatever. I read on FTE here somewhere about someone chasing lack of power on acceleration and after changing everything but the Fuel Filter turned out to be the fuel filter.
BTW what are your thoughts on the 98' 5.4 2 valve vs. the 3 valve. Huge power difference?
BTW what are your thoughts on the 98' 5.4 2 valve vs. the 3 valve. Huge power difference?
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Congrats on the new truck! I went from 98' to an 06' love the 98' but man what a difference. Does your truck idle rough? When you step on it as in getting on the highway is your accelleration smooth, does it hiccup ever so slightly. I wonder if you know if the plugs have been replaced? You can have a misfire for quite sometime before it throws a misfire code usually the P300 or P301-P308, you know this from your 98 i am sure. If it's bad enough for you to chase it, not just the CEL, I would do fuel filter, plugs- maybe boots and COPS, and possibly a real injector cleaning. Not knowing the history, these items will eliminate a lot of possibilities and you will know your truck is ready for that long trip or whatever. I read on FTE here somewhere about someone chasing lack of power on acceleration and after changing everything but the Fuel Filter turned out to be the fuel filter.
BTW what are your thoughts on the 98' 5.4 2 valve vs. the 3 valve. Huge power difference?
BTW what are your thoughts on the 98' 5.4 2 valve vs. the 3 valve. Huge power difference?
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no I havent but I will this weekend, where is that located on the 04? it isnt in the same place as the 03.
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2004 f150 5.4
I have a 2004 f150 5.4 with 120,000 miles the engine shut off and wont start the codes are p0171 and p0430 and the engine in the truck is brand new
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check you EGR valve pipe just quick mine had a rusted bolt it did give me those code and would stall when i would slow down an turn my idle rpm would drop to much and the power steering would make it drop and just stall but i never had the problem of it not starting
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Jul 10, 2009 03:06 PM
