Cleaning Exhaust Filter-Pull Over Safely Now - Ford Powerstroke Diesel Forum
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Old 12-11-2010, 09:12 AM
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Cleaning Exhaust Filter-Pull Over Safely Now

I ran into this situation last weekend on my 2008 F-450. It has 63k miles on it and never experienced this problem before. While I was going down the interstate, it went into its "Cleaning Exhaust Filter" regen. But after about a minute a "Pull Over Safely Now" display or something to that effect came on as well as the check engine light. I pulled over and the engine would not restart. Tried several times and finally after about an hour, it restarted but the check engine light was still on.

I traveled another 8 or 10 miles down the interstate when the same thing happened again. Had to wait another hour for the engine to restart (assuming the temperature had to drop or something). This time I was able to get of the next exit and head home (about 45 miles). Didn't know what to do so I thought putting it in Tow Mode might help and also when I saw the "Cleaning Exhaust Filter" come on, I hit the reset button on the display and that seemed to turn it off, unless the Check Engine Light overrides it somehow and I didn't know it. I did manage to make it back home.

The engine seemed to run normal and everything, but the Check Engine Light remained on. After several days sitting, I called my local diesel shop to schedule an appointment. When I started the engine, no Check Engine Light was on and it appeared to run normal, business as usual.

I haven't heard back from the shop yet, as they were running down a few display codes from the computer.

Has anyone experienced something like this before? Not sure if I should be any EGR or EGT sensors on hand and if they are a real mofo to change out.

Thanks
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Old 12-11-2010, 02:33 PM
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The sensor, exhaust gas temperature, is bad. It is telling the computer that it is over heating. The fault code is P2420 Same thing happen to me. When they went to change it, the tech could not get it out. They then replaced the dpf and the probe. It's still under warranty till 100,000
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Old 12-12-2010, 02:24 AM
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Yep same thing with mine also, was the egt sensor was bad, Ford covered the replacement.
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Old 12-12-2010, 02:52 PM
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Ditto, I was pulling a camper back from Bristol and one minute it said it was cleaning the exhaust filter, the next minute it said emergency shutdown. Took over an hour to restart. Check engine light was on for rest of trip home. Dealer replaced the sensor, no issues since.

Last edited by Smokem08; 12-13-2010 at 05:13 PM.
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Old 12-13-2010, 07:59 AM
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Thanks for the feedback everyone. Haven't heard back from the shop yet, but then again, we just had a blizzard. Hopefully that will clear the problem and I know what to look for in the future.

Might have to reconsider diesels altogether and look to getting a V10, but I am sure those have their own set of problems too.
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Old 12-15-2010, 05:48 PM
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If you disconnect the egt sensor will it put it in a limp mode where you can drive it or will it not start?
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