What's the difference between restricted performance failsafe?
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Join Date: Jan 2018
Location: on the road in NE Oklahoma
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#3
What year is your car? According to the handbook on the 4.0 cars both messages mean the same thing - "loss of power or driveability". Accompanied by an amber warning light means you can keep driving, A red warning light means stop driving.
My guess would be that things like the throttle position sensor giving out of sync readings from the potentiometers would trigger "failsafe mode" as the ECU doesn't know the real throttle position and is substituting a lower value, whereas something like a failed coil would say "restricted performance" as the engine is no longer able to produce full power.
My guess would be that things like the throttle position sensor giving out of sync readings from the potentiometers would trigger "failsafe mode" as the ECU doesn't know the real throttle position and is substituting a lower value, whereas something like a failed coil would say "restricted performance" as the engine is no longer able to produce full power.
#4
I always think of restricted performance as the car stopping me from causing any damage to it so forces me to keep the revs below 3k when it has something like an issue with a knock sensor or coil.
Limp mode is to stop me killing myself or someone else by forcing me to limp to a place of safety when something serious fails - brakes, steering etc.
There are technical descriptions in the handbooks but that's how I explain it
to my wife and
kids.
Limp mode is to stop me killing myself or someone else by forcing me to limp to a place of safety when something serious fails - brakes, steering etc.
There are technical descriptions in the handbooks but that's how I explain it
to my wife and
kids.
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