My 2008 F550 with 109k total miles has a replacement motor, turbos, and injectors all installed by Ford. It only has 4K miles on it but has went into reduced power mode 4 times since September. It runs perfectly 99%of the time but keeps going into limp mode and showing code P252F, engine oil overfilled. It has also shown code PO292, engine overspeed once. I have had the oil changed 2x and DPF forcefully cleaned by ford. The compression and injectors check out excellent and the two different dealers cant find the problem. Any ideas? It has a 16ft box on the back and liftgate and is all stock.

 

lots of idleing while doing a regen or shutting it off while the regen was started.

How long are you running the oil before changing?

 

Neither one was done, I drive 90% hwy and it almost always completes regens. I rarely idle it.

 

Only thing I can think of is a fuel leakage somewhere. Perhaps the fuel lines under the valve covers. Have they monitored the fuel pressure?

 

I'll ask them about that.

 

is the oil really over full? or could it be whatever sensor would monitor that.?

 

It doesn't appear to be high on the dipstick and I can only go off the repair shops word and neither of them drained it into something that it could be measured in. Joe Myers ford said it was about 5 qts overfilled but their mechanic was an a**hole and didn't appear to be very good and couldnt explain how he measured it. He told me to change the oil every 3k and cleaned the dpf to fix the problem. Obviously that didnt work

 

First off check the oil in the morning before you start it, I've found that gives the most accurate measurement. If it's not overfull, I would be trying to figure out what sensor is giving you that information, just like Ghetto Joe says.

 

6 weeks at the dealer and no answers. I drove it home 300 miles without a problem and it worked great for the next 2 weeks and 1700 total miles but yesterday the light came on again. I dropped it off at a third dealership, Tommie Vaughn Ford in Houston today and can only hope that they are more competent than the others. Still looking for ideas!

 

Totally unacceptable, three weeks at the dealer, time to get the Ford service rep involved. Even if it's out of warrenty there is no excuse for that. They(Ford) should be totally embarrassed by something like this, let corporate what you are experiencing.
Fastest way I know of to loose a returning customer.

 

I couldn't agree more however FoMoCo wasn't any help when I called them and Crystal (the rep on this forum) wasn't either. I am amazed at the terrible service from Ford and the lack of knowledge from the service writers and techs.

 

My truck has now been to three dealerships now and has currently been at Tommie Vaughn Ford for almost 2 weeks now. They have yet to give me any answers but just called me this morning requesting my permission to do a manual compression check. their service tech contacted ford directly and was denied coverage to do this testing which means I would be out of pocket another $450 just to do this testing. I have already spent around $1000 on this truck and have only put around five thousand miles on it. I don't know who to talk with it Ford to help get this resolved. any ideas?

 

A couple matches and then insurance claim. Sorta kidding, but couldn't imagine problems if it were my truck. No help here, but sorry about your problems.

 

Is the engine oil actually over full then?

This long and nobody can check the oil?

 

I don't know if the oil is acutally high because the first shop that changed it a few hundred miles after I bought it changed it to be safe and rule that out but didn't measure the amount of oil that he removed. The second shop, Joe Myers Ford told me that it was about 5 quarts overfilled but when I asked to speak with the mechanic and I asked him how he knew this, he told me that was his estimate off reading the dipstick and didn't measure it either. I would gladly drain and measure it myself but the people at Ford will 1)not listen to my claims 2) somehow say that I caused this problem changing my own oil. The problem is that FoMoCo as a whole doesn't support their product nor do they care to help the loyal customers. *I've had nine Ford trucks since 2003: 2-6.0's, 2-6.4's, 1-7.3, 2-5.4's gas, 1-6.8 gas, and an ecoboost F150.