KR07150

Engine fail safe mode, as I understand it, primarily applies to the air intake. It retards the timing in the engine and the computer goes into "limp home mode" which could effect the oit pressure. It happened to me about 3 weeks ago, it turnded out the my air filter wasn't seated properly. That would be the first thing that I would check, it can also be the result of mass air sensor going bad.

rwlkr

I know this thread is a few years old, but just thought I would check to see if anyone has found a concrete fix to the problem.? I see that a tech suggested replacing the throttle body, but it seems some folks have done that and the problem still persists.

The "engine failsafe mode" happens to me once a year at almost the exact same time (every October) with my 2005 Lariat. This past October I was expecting it and sure enough, it happened. However, just this morning it happened again; it's a very dangerous situation because you lose power steering, etc.

Anyway, is replacing the throttle body what the majority have found to fix the issue? The frustrating part is that you cant tell right away if it fixes the problem (at least in my case with the once a year thing). I need this fixed as soon as I can get to it. I have 2 kids now and having my truck stall in the middle of a busy traffic rush is unnerving to me. I love my truck and would hate to get rid of it over this...

LUVmyDUX

I cleaned my throttle body, replaced the TPS on the throttle body body and had to have the dealer reflash my computer for the new TPS. Been good since.

92497pmu

2013 F150 ecoboost power loss, engine shudder, CEL, wrench
Looking for help ASAP

About a month ago I had very similar symptoms to some posts in this thread but I don't think anyone hit on my problem.

Truck info-
2013 F150 supercrew 3.5L ecoboost 4x4 XLT with the 3.55 rear end
about 70,000 miles total- mostly highway, about 20k miles towing
I have the ESP warranty to 125,000 miles? +/-

In November, I stopped at walmart to buy oil for a weekend oil change.
Truck restarted hard.
VERY rough idle, service engine "wrench" light, CEL came on - truck could barely stay running.
We towed on my flatbed to the dealer- after several days & lots of tests, they found a bunch of CEL relating to the turbo, throttle, etc (I don't have the slip with me)
Result- they replaced throttle body & reset codes.
Truck seemed fine.
$100 deductible on ESP

December, maybe 10,000 miles since last service in November +/- (lots of highway road trips)
I'm on a cross-country road trip NY- Cali with a little airstream trailer, 18ft 3500lb trailer.
Truck dies on US interstate 80 near Chicago.
Similar problems-
Power loss, CEL, service engine "wrench" light

NEED HELP ASAP -
I'm missing out on Christmas with my family because they can't fix it.

Day 1
Dealership reset codes, did a PCM reprogram, charged $170
Hooked up, drove off- same problem as soon as I got to highway ramp
No CEL lights, but "wrench" light came on and I lost power.
Truck re-starts & drives fine back to dealership

Day 2
Dealership called the hotline, continuity tested and load tested the harnesses from computer to the throttle body- checked & replaced some chips, wires, wire harness. Road tested without trailer about 50 miles. Seemed ok. Truck seemed fine.
$100 deductible on ESP
Hooked up, drove off- same problem about 1-2 miles from the dealer - I didn't even get to the highway.
No CEL lights, but "wrench" light came on and I lost power.
Truck re-starts & drives fine back to the dealer.

NEED HELP!!
Day 3 - dealer is closed for Christmas Eve & Christmas.
I drove another 10-20 miles around empty to try and reproduce the problem- no CEL, no "wrench" lights
Dealer asks me to check back after Christmas.
Dealer closes- I get 3 consecutive "wrench" MIL and a CEL with code P2112 that evening.
Now I'm stuck in Indiana for at least 2-3 days over Christmas

Day 4, Christmas Eve-
I pulled the engine cover off and googled a "how to change ecoboost spark plugs" from the parking lot of an auto zone.

Went pretty smooth - I did it in the autozone lot as I was looking for immediate feedback about my loss of power situation in about 45 minutes as it's going to snow 3-6 inches tomorrow.

6 new plugs with a 0.030 gap.
never seize on the threads.
di-electric grease on the connection.
Drove out of the lot and had a "wrench" service engine light within 1/4 mile.

Day 5-
Dealer can't replicate MIL or P2112 codes even after driving.
I can't replicate issues.
I leave at 10am and successfully make it 700 miles to Lincoln Nebraska

Day 6
Start at 7am in light snow, very cold (7 degrees F).
Drive about 350 miles across Nebraska-
Same problems all over again- "wrench" MIL, CEL P2112, truck loses power, stalls on highway.
I limp into Ogallala NE - ford mechanic pulls P2112 code.
Checks it on his laptop, clears the code.
We go for a quick shakedown ride to replicate- it's not a "hard fault" and doesn't stay locked in/ and re-enable at restart.
Truck throws a new code within 1000 feet out the dealer lot.

Now I'm stuck waiting over a weekend at a very small-town dealer who barely has mechanics to service his own customers- let alone my month long issues.

NEED HELP!!
I have a Mechanical Engineering degree and not real thrilled about the "check/ change" component poke & hope fixes- seems good then fails.

Has anyone else had a similar problem?
Any other leads for them to check out?

I have some thoughts that it could be a bad throttle body again (this one is nearly new- only 10k miles- 50/50 hwy and towing) throttle position sensor, wiring, connection or similar. Maybe even bad fuel or fuel filter.

I aslo welcome any advice from Ford Engineers or Techs who may be familiar or can give specific advice
Thanks

screamineagle

Post in the 09+ section, maybe someone there can help. Good luck!

92497pmu

My mistake- thought i was in that thread.

juallhuce

If they're certain it isn't a wiring issue and they're certain it's not a throttle body issue, the only other thing in the loop is a PCM. Unfortunately, that's not something you can just switch out and try. Good luck buddy, I hope they can figure it out.

E.brown.459

Asking about my 2015 F-150 just got oil changed the other day at Fords thought that may of had something to do with the Oil Pressure gauge dropping down to nothing or as low as it goes while idling did not help did drive it several hundred miles this weekend never had an issue with it dripping unless idling and could put into "N" and slightly rev engine to get it up. But now its dropping while its moving so I don't know what to do... Someone said something about Flashing the computer helped some whats this and how to do..... also with this cause there to be a code given I can have read at Auto Zone? How can I tell if it is just a sensor issue and there still is Oil Pressure.... Engine runs great and sounds fine no knocks or other noises when the oil Pressure drops either..... And help would be great.... Thanks.