Hi all, I’ve done some searching but not found the exact same problem – although my search powers are weak.

Water in Fuel light came on a few days ago and I drained it – no water as usual – and cleaned up the connector, but didn’t clear the code as it normally goes away by itself. Thursday I was picking up some stuff and during the drive the reduced engine power warning came up. The CEL has not come on at all during this time. When I got back I pulled and deleted the codes:

P0073:00 ambient air temperature sensor

P0073-P ambient air temperature sensor

P2269 water in fuel

P1140 water in fuel

B1D79 microphone problem


Went for a drive, still the same warnings, following codes:

P0073:00 ambient air temperature sensor

P2269 water in fuel

P1140 water in fuel

P2209 NOx sensor problem



Did an oil change, deleted the codes, disconnected the batteries for a couple of hours, and started up today to let it idle. Immediately got the reduced engine power and WIF warnings and the following codes (same as Thursday):

P0073:00 ambient air temperature sensor

P0073-P ambient air temperature sensor

P2269 water in fuel

P1140 water in fuel

B1D79 microphone problem



I noticed the Motorcraft batteries are 6 years old, both are at 12.6V separately after a couple of hours of sitting, but I’ve not load tested them. I replaced fuel filters around 4 months ago – Motorcraft again. Underbody seems OK, no obvious cable problems. Any thoughts? What should I look for with Forscan?

 

Weak batteries have been know to release electrical gremlins for some people and at 6 years old my attention would go there first, but I haven't had those kind of issues and my batteries rarely make it 3 years.

 

One of my thoughts too - I've ordered a battery tester, should arrive Monday. They still turn the motor over quicker than new batteries in my previous 6.0 but who knows what the voltage is while they're doing it...

 

12.6 V for the batteries is low. Regardless of whether or not they are the problem, they will be soon enough. Best to replace on your terms.

 

did you drain the water Seperator drain ...like a quart or so....on a level surface.


me personally would not be driving the truck until the WIF situation is resolved.

 

There was an issue with the WIF sensor wiring and water ingress into the connector, not sure if it was with your year model, or if it has been wet at your local, but something to consider. As for there actually being water in your fuel system I have my doubts considering the problem as a whole you are having though water in the fuel it should be very evident in a clear container drainedfrom the primaryfuel filter/ water seperator as it would be on the bottom and clearly noticeable. Though i have litte faith in the oem fuel filtration, so little i have replaced it completely. I still feel you are having an electrical issue not a fuel issue, maybe a bad WIF sensor? That said it is not my truck and ultimately your choice.

 

Definitely no water in the fuel and I’ve cleaned the connector as it has alarmed when wet in the past.

WIF does not cause a reduced engine power problem which is why I’ve posted all the codes. 12.6V for a flooded battery indicates over 90% charged, but I’ll try the load tester when it arrives tomorrow.

I’ve seen a previous thread stating that changing the fuel filters got the problem to disappear for a few hundred miles but surely low fuel flow/pressure will cause an alarm.

 

Load tester arrived this afternoon. It's close to freezing here, raining, and a nasty north wind is blowing, testing delayed until tomorrow. I did get to read the manual and watch a few YT reviews though.

 

So, batteries individually check out as green, together red, but initial startup showed minimum 10V, so I reckon they’re OK. Still getting the same codes, once with CEL, but mainly not. That’s strange as Forscan states P0073 should set it.

Went for a drive to see if there was any change and noticed the heater blower is not working. Next task is to look at that and see if it is indeed an electrical problem. Some google research needed first.

 

Well I seem to have stated something incorrect. Over at Powerstroke.org there’s a thread explaining that WIF will trigger the REP but only after a certain time.

WIF sensor was dirty so got a good clean. First time I’ve had to use a 25mm wrench, or is it an old 1” size? Only getting WIF codes now, whether the sensor is plugged in or not, so looking at the cabling, which is a bit flaky at the sensor connector.

 

Today I stripped the cable protection off, all the way back to the main loom where the pump power cable breaks out. There was a tiny nick in one of the cables and cleaning it cleared the fault and let me reset the WIF counter. I then taped everything back up and went for a test drive.

Fault came back after 10 minutes but I know where it is now. I’ll have another go tomorrow, but I’ve got full engine power back.

Does anybody have information about the WIF counter? Does it count up with miles or engine starts?

 

Don’t have any specific info on the WIF counter, but FORScan can reset it.

Looks like you figured out the problem with the WIF but as others have said, your batteries are suspect. Don’t be surprised if you see a bunch of code reappear or have other odd issues. These trucks are very sensitive to the battery state.

 

I’m so glad I stumbled over that counter reset in YouTube. What I did find out is that it won’t reset if P2269 is set, Forscan gets a fail response from the PCM.

Batteries are coming up, but a minimum of 10V during starting on a subzero day means they still have some life left, but I’ll be watching out for weird events.

 

Fault gone after the spraying, I’ll give it another go as it’s dry.

Back to dropping some trees today that are leaning against others, always a twitchy experience, at least for me 😁