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I was driving down the road last week when my van went into “limp mode”, and a warning came up. I was able to only accelerate slowly, and not engage the turbo. I thought the turbo went out, but it turns out a sensor detected water that apparently was making its way in to the air filter. The baffle (?) at the bottom of my windshield that diverts water was apparently loose, allowing water to get in the air box and soak the air filter. It’s a 2018 3.5. My dealer told me it’s not a warranty claim because it was tampered with by the oil change shop that did my previous oil change. After i explained just how dissatisfied I was with that, he relented and “pulled some strings” and had it fixed and the sensor replaced. So, 2 questions. Do I need to worry that water made its way into the motor (it runs great now), and is it normal for water to get into the air box? Thanks
 

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Below is one of many Threads you can view about this problem.

Semper Fi

 

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Completely normal.
No, Ford did not "fix" this issue until just a few months ago.

You'll find out more when you read all 1500 posts on the link to the topic thread.
 

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Well, I started reading the 1500 posts, but got stranded and confused after a couple hundred or so. Surly Bill, when you say Ford fixed this a few months ago, I assume you mean on the 2020s. We have a 2019, so I should still put a garbage bag over the air filter? As it sounds like even after we seal the clamps and keep it cleaned out, water can still enter from different paths.
 

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Well, I started reading the 1500 posts, but got stranded and confused after a couple hundred or so. Surly Bill, when you say Ford fixed this a few months ago, I assume you mean on the 2020s. We have a 2019, so I should still put a garbage bag over the air filter? As it sounds like even after we seal the clamps and keep it cleaned out, water can still enter from different paths.
My 2019 has the fix, but still no fix on the side opposite for the electrical box.

You may want to read from the latest post back. I would recommend searching for TURD up in the search box.

Luckily for me I am in Southern California where we don’t get rain so I have not had to fully address this issue yet
 

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Check post 1493, quoted below. The forum app isn’t letting me link it. Thanks to Surly Bill


Because you're too lazy to read 75 pages and 1500 posts, I'll sum it up for you.

No, Ford did not fix the issue of water dripping into the engine bay for 2020.
They did not fix it for 2019, 2018, 2017, 2016, 2015 either.
They DID create a bandaid solution that diverts most of the water through the body panels and onto the ground and that has been in effect for all model years (recall and install for 2015/16). But some still drips into the engine bay.

For 2019-20 they DID redesign the air filter box so the lip is facing down instead of up; so it no longer catches water like a moat and redirects it to the air filter.

However, water will still enter the engine bay. Mostly when parked because it runs down the windshield to get there; and when driving it is blown back over the top. It will still drip on to the airbox, but that isn't an issue now. It will still drip onto the electrical connections on the driver side, and that IS an issue. You'll have to wrap those in plastic or fashion some other sort of roof to keep the water out.

Do not look to Ford for some sort of OEM fix. Look to the brilliant minds here on the forum for foolproof 100% water intrusion prevention methods.
 

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I was driving down the road last week when my van went into “limp mode”, and a warning came up. I was able to only accelerate slowly, and not engage the turbo. I thought the turbo went out, but it turns out a sensor detected water that apparently was making its way in to the air filter. The baffle (?) at the bottom of my windshield that diverts water was apparently loose, allowing water to get in the air box and soak the air filter. It’s a 2018 3.5. My dealer told me it’s not a warranty claim because it was tampered with by the oil change shop that did my previous oil change. After i explained just how dissatisfied I was with that, he relented and “pulled some strings” and had it fixed and the sensor replaced. So, 2 questions. Do I need to worry that water made its way into the motor (it runs great now), and is it normal for water to get into the air box? Thanks
I have a 2015 Ford Transit Cargo Van. Water getting into the air intake is definitely an issue with my van. Water saturates the air filter, the Air Flow Sensor fails. In one incident water got into the engine oil. I considered myself lucky when the van didn't start. Otherwise I am sure there would have been engine damage.

I bought the van in 2019. Without warranty as it was 4 years old.

Recently after an overnight wet snowfall I started the van to clear the vapour off the inside of the windshield while I brushed the wet heavy snow off the windshield and hood. The engine sounded like crap, so I popped the hood latch. The second the hood lifted that little bit the sound of the engine idle returned to normal.

I lifted the opened and closed the hood a few times to clear the snow that was stuck in the louvered vents on the hood. As I looked around suspiciously to find the cause of the wierd sounding engine idle, I quickly saw that water had come from the vent on the hood on the passenger side right above the air intake. I dried out the opening of the vent under the hood with a towel. Then I noticed the vent on the drivers side has a plastic cover over it on the underside of the hood. I thought that the cover on the passenger side must be missing so I went to Ford to check it out with the parts department and order a new one. Turns out they don't have a cover on that side. It is meant to allow air into the air intake, so no cover! Logically, the same vent allows melting snow and rain to enter the air intake as well.

Totally dumb design in my opinion. Not that I am a mechanic by any means but this isn't rocket science. There has got to be some responsibility on "FORDS" part to fix this mistake.

It is only as I've been pondering this dilemma for the past few days and googling the problem that I've figured this out. The air intake is right below the wipers on the passenger side. It could get water blowing in when the vehicle is in motion as well. Water or melting snow from the windshield or wiper fluid, who knows?

I am determined to get to the bottom of this before the next break down. In the meanwhile I am thinking a spare air filter and air flow sensors are going to become as necessary as a spare tire and a jack! It seems to be inevitable that this will be an ongoing issue.

I may put a shower cap on the air intake when the van is parked and a big sign taped to the dash to remind me to take the shower cap off before starting the engine. Not a brilliant solution but it might save me the inconvenience and expense of repairing the damage that is likely to reoccur every time it rains or snows!
 
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