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thats sounds like a possible boost control solenoid failure.when the boost solenoid fails it wont activate a warning light and because of the lack of boost the engine computer fail safe feature will put it in limp mode in order to keep the driver from harming the engine
This warning means that a fault has occurred that would have disabled the car in older models, the computer control has worked around the fault to avoid stranding you with a non operational car. You need to see a dealer or a well equipped shop and have the computer scanned for the fault code or codes that are stored when this happens. The engineers who design cars and trucks call this "Failure Mode Strategy"
IF YOU SEE ANTI LOCK AND BRAKE WARNING LIGHTS YOU HAVE BRAKE FAILURE.NOT SAFE TO DRIVE CAR.BEST TO LET DEALERSHIP FIX ABS BRAKES MODULATOR MASTERCYLINDER UNIT AND THEY CAN RESET LOW TIRE LIGHT.VECHICLE NOT SAFE TO DRIVE.
Thanks for using FixYa. In Jaguar XKR the parking brake is controlled electronically unlike the cable ones. The voltage applied to the electronic Park Brake module is
applied at the same time you start the engine, consequently on a very cold day
the battery will be far less efficient and due to the extra power required to
start a very cold 6 cylinder engine the voltage will fall.
Although this reduced voltage will quite happily start the car it will trip out
the Parking brake. To help avoid this problem happening again switch the
ignition to position 2(position just prior to starting) and press the chrome handbrake
tab down while having your foot on the brake. The brakes will be released, the
park brake light on the dash will go out and you can now start the car.
On the new XKR module the electronic handbrake is not activated by the gear
shift as in the later S models so you can start the car and then release the brake
when the engine is running.
Please do accept the solution if the issue is resolved or else revert for further assistance.
I encountered the same problem, my engine fail safe mode light came on and shut the car down. I took my car to my mechanic and he found the solution to the problem. The car needed a throttle body cleaning and the fuel filter needed to be replaced. After having my truck serviced my mileage increased from 14.6 mpg to 15.4 mpg
ENGINE FAILED SAFE MODE WARNING LIGHT, GONE Total cost $86.45