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Thread: 2006 Ford Taurus P0430 trouble code

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    5.0 hoarder CMC Event Coordinator MGLT's Avatar
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    Default 2006 Ford Taurus P0430 trouble code

    My dad's car has had a check engine light for awhile now and the car needs to be tested for emissions soon. The code is p0430 which is a catalyst efficiency error for bank 2. The car is an 06 taurus with the 3.0L pushrod vulcan engine.

    We replaced the bank 2 downstream o2 sensor twice and the code returned both times. The first time my dad bought an aftermarket sensor from Napa. I figured that we just got a bad sensor and I told him to buy an oem sensor from the dealership parts counter. After a couple weeks with the new ford motorcraft sensor the CEL came back on.

    The problem is obviously not the sensor. The car isn't that old and it has ~65k miles on it so I don't think the catalytic converter needs to be replaced. After doing a little research, it sounds like the DPFE module could be the problem. Anybody know where is the DPFE is located or how difficult it is to replace? Anyone have any other suggestions?


    Mods, please feel free to move this thread. I wasn't sure where to post it.
    Last edited by MGLT; 11-21-2010 at 05:24 PM.
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    RedBeard CMC Boss460 ScreamingMach46's Avatar
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    I'm my experience it's usually a bad catalytic converter and that should be covered under a factory emissions warranty. He may want to take it to the dealer for that.

    We recently had that issue on our 06 Viper (less than 40k miles) at work and a customers A4 (60k miles)
    Last edited by ScreamingMach46; 11-21-2010 at 05:33 PM.
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    5.0 hoarder CMC Event Coordinator MGLT's Avatar
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    I'm also starting to think the cat needs to be replaced. From what I've found after a quick google search, if the DPFE was bad there would probably also be an egr error code.
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    Quote Originally Posted by mee14x View Post
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    Senior Member CMC SuperCobraJet It's me Mario's Avatar
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    The cat needs to be replaced p0430 cat is below threshold meaning it is either deteriorating or not reaching it's operating temp
    Blown 92

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    the one with the 2000 performance Red V6 CMC 289 coreyp's Avatar
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    Join this place http://www.taurusowners.com/index.php?app=forums&
    and post the question there.I'm a member there and there is people on there who can help you figure this problem out.

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    resident Fox pushrod leader guy CMC Boss460 LTDmasta GT's Avatar
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    quick and easy diagnosis procedure for P0420/430 if you have an infared thermometer:

    run the car to operating temp

    jack up the front of the car

    hold the accelerator to 2000RPM for about 2 minutes. after the 2 minutes, check the FRONT catylitic converter (P0430) inlet temp (before the cat) and the outlet temp (after the cat) for temperature. ideally the temperature should be about 100* hotter at the outlet temp than the inlet temp for a propertly working cat, 50* is right around its threshold, so anywhere in between is fine. if you have temps above it, the cat is working but you could have a higher than expected fuel mixture, however that will throw a seperate code.

    its NOT uncommon that these converters go bad. the Taurus/sable line are known for it.


    and its definetly NOT the DPFE. DPFE will throw a P401/402 code
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    5.0 hoarder CMC Event Coordinator MGLT's Avatar
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    Thanks Epi! I was hoping you would see this thread, I do have an infrared thermometer so I'll give that a try when I have some time later this week.
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    Quote Originally Posted by mee14x View Post
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    Quote Originally Posted by Silver Vert 06 View Post
    Thanks Epi! I was hoping you would see this thread, I do have an infrared thermometer so I'll give that a try when I have some time later this week.
    let me know how it goes. text me if you need any more info
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    Registered User CMC 281 GotMuscle's Avatar
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    Most likely your cat is bad easy way to check it is by jacking the front of the car up and hitting the cat with a rubber mallet. when the converter starts to deteriorate some of the insides fall all over and you can hear them bunce around when struck with the mallet.
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    Quote Originally Posted by GotMuscle View Post
    Most likely your cat is bad easy way to check it is by jacking the front of the car up and hitting the cat with a rubber mallet. when the converter starts to deteriorate some of the insides fall all over and you can hear them bunce around when struck with the mallet.
    I know what your saying, but I drive the car quite a bit and I don't hear any rattling. I'm gonna give Epi's method a try before I start hitting things with a mallet lol.
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    Quote Originally Posted by mee14x View Post
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