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When Fail-Safe Mode Is Activated
WARNINGS
Fail-safe mode is for use during
emergencies only. Operate the
vehicle in fail-safe mode only as long
as necessary to bring the vehicle to rest in
a safe location and seek immediate repairs.
When in fail-safe mode, the vehicle will
have limited power, will not be able to
maintain high-speed operation, and may
completely shut down without warning,
potentially losing engine power, power
steering assist, and power brake assist,
which may increase the possibility of a
crash resulting in serious injury.
Never remove the coolant reservoir
cap while the engine is running or hot.
You have limited engine power when in the
fail-safe mode, so drive the vehicle with
caution. The vehicle will not be able to
maintain high-speed operation and the
engine will run rough. Remember that the
engine is capable of completely shutting
down automatically to prevent engine
damage, therefore:
1. Pull off the road as soon as safely
possible and turn off the engine.
2. Arrange for the vehicle to be taken to
an authorized dealer.
3. If this is not possible, wait a short
period for the engine to cool.
4. Check the coolant level and replenish
if low.
5. Re-start the engine and take your
vehicle to an authorized dealer.
Note: Driving the vehicle without repairing
the engine problem increases the chance of
engine damage. Take your vehicle to an
authorized dealer as soon as possible.
Engine Fluid Temperature
Management (If Equipped)
WARNING
To reduce the risk of collision and
injury, be prepared that the vehicle
speed may reduce and the vehicle
may not be able to accelerate with full
power until the fluid temperatures reduce.
Your vehicle has been designed to pull a
trailer, but because of the added load, the
vehicle’s engine may temporarily reach
higher temperatures during severe
operating conditions such as ascending a
long or steep grade while pulling a trailer
in hot ambient temperatures.
At this time, you may notice your engine
coolant temperature gauge needle move
toward the H and the POWER REDUCED
TO LOWER TEMP message may appear
in the information display.
You may notice a reduction in the vehicle’ s
speed caused by reduced engine power.
Your vehicle has been designed to enter
this mode if certain high temperature/high
load conditions take place in order to
manage the engine’s fluid temperatures.
The amount of speed reduction will
depend on the vehicle loading, towing,
grade, ambient temperature, and other
factors. If this occurs, there is no need to
pull off the road. The vehicle can continue
to be driven while this message is active
The air conditioning may also cycle on and
off during severe operating conditions to
protect overheating of the engine. When
the engine coolant temperature decreases
to a more normal operating temperature,
the air conditioning will turn on once again.
If you notice any of the following:
239
Super Duty (), enUSA
Maintenance
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