Stop Safely Now failures
Posting Guru
Joined: Jul 2004
Posts: 1,235
Likes: 0
From: Kamloops, BC
Just had a failed sensor leave me stranded 4 hours from home, in the mountains, in a snow storm... 90 minutes from the nearest Ford dealer. 
Luckily this was in a place where I had a cell signal. Most of the time I spend in the mountains (which is a lot) is spent in areas that are a 60-90 minute drive from the nearest cell signal.
I've owned quite a few Ford trucks since 1990 and this is the first time I've ever needed a tow - so in that respect, I guess I'm lucky. But now I know that every camping trip is going to be accompanied by the worry of being left stranded again with this truck.
Luckily this was in a place where I had a cell signal. Most of the time I spend in the mountains (which is a lot) is spent in areas that are a 60-90 minute drive from the nearest cell signal.
I've owned quite a few Ford trucks since 1990 and this is the first time I've ever needed a tow - so in that respect, I guess I'm lucky. But now I know that every camping trip is going to be accompanied by the worry of being left stranded again with this truck.
Senior User
Joined: Jan 2013
Posts: 151
Likes: 0
From: Spring Hill, SC
When is FoMoCo gonna step up and take charge of this issue? I have a extra EGT sensor, 13mm wrench, and OBD-II in the truck just in case. I love this truck but if I have to crawl under my truck for anything other than periodic maintenance, I'm going to be driving another brand.
Lead Driver
Joined: Jan 2006
Posts: 6,267
Likes: 5
I think the problem is this;
IF, If, there was no DPF, it seems like the engine could go into a low power mode during sensor failures, like a 150 hp tune so that it is safe to run even without any boost etc, without overheating.
However, with a DPF on, the engine can't be left to run like that, because it NEEDS to be able to regen, otherwise it will be on the edge of the road anyways, and with a fully plugged DPF.
As stated above somewhere, smarter circuits an identify a bum sensor, and leave it from the calculations. For EG, if the EOT and ECT are 200 degrees, and AIT is 80 deg, and and exhaust sensor says -5 degrees, obviously thats an impossible value, so the computer could disable input from that sensor temporarily.
IF, If, there was no DPF, it seems like the engine could go into a low power mode during sensor failures, like a 150 hp tune so that it is safe to run even without any boost etc, without overheating.
However, with a DPF on, the engine can't be left to run like that, because it NEEDS to be able to regen, otherwise it will be on the edge of the road anyways, and with a fully plugged DPF.
As stated above somewhere, smarter circuits an identify a bum sensor, and leave it from the calculations. For EG, if the EOT and ECT are 200 degrees, and AIT is 80 deg, and and exhaust sensor says -5 degrees, obviously thats an impossible value, so the computer could disable input from that sensor temporarily.
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