Engine fail safe mode...
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Cross-Country
Joined: Jun 2003
Posts: 78
Likes: 1
From: orange county,ca
Engine fail safe mode...
05 Lariat while driving down the road engine goes into fail safe mode.
happen 3 times in last 2 months.Turn engine off restart no problems and does not leave any codes what gives?
happen 3 times in last 2 months.Turn engine off restart no problems and does not leave any codes what gives?
Former ******
Joined: Feb 2008
Posts: 138
Likes: 0
From: Winder, GA
Bone stock? No modifications?
If so, have your local stations recently switch to full 10% Ethanol blended gasoline?
If so, you are quite probably running lean and it's causing the PCM to set a lean code and go into Failsafe Mode.
There have been several threads related to Ethanol blended fuel causing lean conditions as well as poor fuel economy. Do a search for Ethanol or E10.
Take care.
If so, have your local stations recently switch to full 10% Ethanol blended gasoline?
If so, you are quite probably running lean and it's causing the PCM to set a lean code and go into Failsafe Mode.
There have been several threads related to Ethanol blended fuel causing lean conditions as well as poor fuel economy. Do a search for Ethanol or E10.
Take care.
Senior User
Joined: Jun 2005
Posts: 375
Likes: 0
My 08 5.4 Screw is 100% stock, I don't think so cal gas has the e-10 in it. Milage never varies much unless It's my driving habits. I watch milage carefully as it is usually an indicator of something else. I have several issues creeping up on this truck, rear power slider rattling, failsafe and the false neutral up shift on light acceleration at 2-3 shift. I have to take my shell off for them to work on the rear window, will do after holidays. Oh Ya the rotors are starting to shudder, I am not hard on brakes either. Truck has 8,000 miles.
