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Discussion Starter #1
Here is description of the actual 3 events. I have posted this over at Ford Truck Enthusiasts already, here is the thread. I will post just the issues here first.

1.)
Cold morning, 5-8 degrees IIRC, haven't driven truck for 3 days prior. Let truck idle and warm up for 15 mins or so. Moved selector to 4x4 high, light on dash shows "check 4x4" and the wrench symbol. Cycled back to 2wd, then to 4x4 again, same thing. Put in drive and babied it out of the driveway onto the road. Tried engaging again,while rolling, no luck. Drove to destination, shut off vehicle, came back out and started it up. This time, it worked on the first try.

2.)
About a week later, driving to town, saw a guy in the ditch(very snowy and icy) so I stopped and pulled him out. Went into 4x4 Low, just fine, pulled him out no slippage or struggle. Went to put back into 4x4 HI and it sounded like gears grinding VERY loud, and would not engage. The Check 4x4 light displayed. Put it back into 4x4 Low, drove 5 feet, then back into 4x4 HI, and it worked just fine.


3.)
About another week or two later(this past Thursday), it was working fine while driving, and I had been in and out of 4x4 HI 2-3 times throughout the drive. We were on our way back home from our destination, and tried engaging it again, and it wouldn't go into 4x4 HI yet again. This time, we heard the same VERY loud grinding sound, and said the heck with it, time for a trip to the dealer.

SO, last Friday, I called the dealer and set up an appointment for Monday(this morning) as I had the day off to take the wife to the doctor anyway. I just got off the phone with the service department 30 mins ago, and I was not impressed. Here is what the woman said...

"To be honest with you, the technician thought you didn't know how to engage it properly, so he took it out to the snowy area of the parking lot and was playing with it. He walked back in here 5 minutes later and said that he needed someone to tow him back in, the truck stalled and wouldn't start back up."

So I asked if I could get a loaner truck for the time this one was going to be down. She said, "well, the tech is calling ford now, so give me an hour and I'll call you back"

So, tell me this, how in the heck do you manage to get the truck to not start just by engaging or disengaging 4x4!!!!!????? I was not happy to say the least.

Then I got an update:

The story now, is that the tech had the truck in the middle of the shop, trying to program the PCM with an update, and THEIR computer crashed while doing it. Now, this obviously toasted the PCM, but the tech doesn't understand that yet. On top of that, they still have no clue why it stalled and won't start to begin with. So, they are waiting on a call back from Ford, and I won't hear anything until tomorrow. I asked for a loaner, they offered me a Sonata...I declined, it wouldn't even make it up my road. Her response was, "what, do you live in the sticks or something?" I said yes...

Please look at the link for the thread above for the rest of the story. Does anyone have idea what else it could be wrong with this?
 

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I read the post on Ford Truck Enthusiasts. Interesting stuff.

I had my 4x4 not work once and got the check 4x4 light. I'm 100% sure this is because I had just went through the automatic car wash in below freezing temps and something underneath the truck must have froze up. So, I'm wondering if somehow the underside of your truck got wet and then froze up? Just a guess.
 

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Discussion Starter #3
If that is the case, that it was from something being frozen....talk about poor engineering. The truck is made to endure severe winter conditions, and it hasn't even been put through a good hard storm yet. I am confident however, that it is not the case, as it has been in identical conditions on multiple occasions, and worked one time but not the other. I will update more as I use it, and we will keep our fingers crossed.
 

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I had the "service 4x4" and wrench symbol come up when trying to engage 4x4 hi once. It only happened the one time...So, you are not alone.

Olli
 

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This morning it was -10F and 4x4 would not engage. Tried multiple times and then went out and manually turned the hubs and it starter working. Not sure if turning the hubs did it or just turning the knob back and forth a bunch of times. Worked fine the rest of the day
 

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Discussion Starter #6
^^^ At first I had hoped it was the hubs, but they made no difference when I locked mine manually when it wasn't working. Also, I was told that the hubs do not actually have any feedback to the PCM to tell it whether or not the 4x4 engaged...who knows.

As for the issue, I have only driven the truck a few times since getting it back, and it hasn't acted up yet, but then it would go a week at a time without acting up, so I'm still not convinced.
 

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Mines done the same thing since day one, usually once a week and always goes away if i go back to 2wd and cycle the power. Actually did it the first day I bought the pickup. For me it seems to happen most in the morning when its real cold after I've had to drive through snow the night before. I'm about 90 miles from the dealer so its not easy to bring it in when its acting up. It also makes a nasty clunking noise sometimes when it engages my plan is to drive it tell something really breaks then it should be easier for them to fix :lol:. Keep us posted if you figure anything out.
 

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Hey guys,

I know this is a bit of an old post but I wanted to check in a find out if you are still having concerns. If so, I would like to reach out and offer to help. So I can assist and escalate this, please send me your VIN, approximate mileage, and dealer name in a private message.

Cory
 

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Hey guys,

I know this is a bit of an old post but I wanted to check in a find out if you are still having concerns. If so, I would like to reach out and offer to help. So I can assist and escalate this, please send me your VIN, approximate mileage, and dealer name in a private message.

Cory
Now that spring is around the corner. I haven't had any more problems. I'll have to wait till winter comes back
 

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Hey guys,

I know this is a bit of an old post but I wanted to check in a find out if you are still having concerns. If so, I would like to reach out and offer to help. So I can assist and escalate this, please send me your VIN, approximate mileage, and dealer name in a private message.

Cory
Cory,

I just sent you a PM. I had a similar experience in the snow this morning in 22 degree weather with my check 4X4 warning and wrench showing up on the dash after about 2 minutes of operating in 4X4 High. I was unable after multiple attempts to get back into 4X4.

Damon
 

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Cory,

I just sent you a PM. I had a similar experience in the snow this morning in 22 degree weather with my check 4X4 warning and wrench showing up on the dash after about 2 minutes of operating in 4X4 High. I was unable after multiple attempts to get back into 4X4.

Damon
Hi Damon,

I've responded to your PM. Please let me know if you have any other questions or concerns!

Crystal
 

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TD7667: I'm in Colorado, so nowhere near Pittsburgh. Why do you ask?

I took the truck in for repair and it turns out it was a fractured vacuum hose which was replaced. Since it is too early for dry rot on a 2011 truck, it must either have been manufacter defect or unlucky rock hiting the hose.

Seems to work fine now.
 

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I took the truck in for repair and it turns out it was a fractured vacuum hose which was replaced. Since it is too early for dry rot on a 2011 truck, it must either have been manufacter defect or unlucky rock hiting the hose.

Seems to work fine now.
I wonder in your case if manually locking the hubs would've band-aid'ed the situation for you.

I had the check 4x4 last winter, turns out an $18 solenoid had failed, rendering the system useless. Manually locking the hubs did not help with my scenario, details below. Haven't had an issue since.

Customer states the check 4x4 light comes on when engaged

Misc replace valve assembly 81005 W94
Part # 6L3Z-9E441-A

Cause: Electronic 4x4 diagnostic P1867, C1010:13. Clear DTC and engauge/disengauge 4x4 5 times per SSM 21807. Code did not reoccur. Perform pinpoint test K for C1010:13. K1-Y, K19-Y, K20-Y, K21-N. Replace CVH solenoid. Retest. Pass.
 

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Discussion Starter #16
For what it's worth, I have not had any issues this winter at all. The closest it came was a message saying shift delayed, please pull forward. This is normal when further alignment is needed. I was able to pull forward and all was fine. It does highlight however, the necessity to engage 4x4 BEFORE you are even close to getting stuck. Otherwise you might not get it in.
 

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I really need some help! Have had a transfer case blow out last winter and had a very poor customer service experience. I now not even a year later have the same issue that these folks are talking about. Will not shift into 4x4 in cold weather. So far in 9 months my truck has been in the shop for 6 weeks and it has provided no change. Very frustrated and not sure what to do.
 

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I really need some help! Have had a transfer case blow out last winter and had a very poor customer service experience. I now not even a year later have the same issue that these folks are talking about. Will not shift into 4x4 in cold weather. So far in 9 months my truck has been in the shop for 6 weeks and it has provided no change. Very frustrated and not sure what to do.
Welcome to the forum, Unit48; I'm here to help! What's your truck's model year and mileage? Have you returned to the dealership so they can inspect? Let me know and I'll start researching options.

Crystal
 

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I'm having similar issues. Curious if you guys also got a check engine light when you got the check 4x4 light? My truck is showing code C1010 but I can't tell if that was a result of the check 4x4 light as I also have another code that's been in there forever so no idea when the C1010 started.
 

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I've had the same issue twice on my 2001 F250. Once during the summer on a washboardy road pullin our trailer stopped and put it in 4x4 and check 4x4 light came on and did not engage into 4/4 continued to destination and then tried it again and went in just fine hasn't happened again for over a year. This May was in Nevada desert with friends and it rained for days when we went to leave I put it in 4x4 no problem pulled our trailer out but our friends were stuck so pulled them out and on our way, once on better road took it out of 4x4 and drove 5 miles came to another muddy spot so switched it to 4x4 and check 4x4 light came on and would't engage only posi track worked and made it through the muddy spot. Tried several times turning truck off and on and trying to put in 4x4 with no luck, drove 60 miles to get fuel turned truck off and when I turned the key back on I switched to 4x4 and it engaged several times. Only seems to happen when I really need 4x4. Dealer says they can't diagnose if it's not happening so will have to see if it happens again.
 
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