SOURCE: Failed safe engine mode 1999 V8 S Type
I've got a 2000 that did the same thing. Get this, it was caused by a defective trunk seal that let water in my trunk and got my wiring wet. Could'nt even shut off the car, only way to kill it was to pull the positve battery cable, negative won't kill it. After all dried out, and jag dealer reset my failsafe mode all good....... until now i have a .500 ma draw on power while sitting unused, brand new batteries down in 1 week??
SOURCE: fail safe engine fail
this can be caused by a few things. Diagnostic Trouble codes needed to diagnose. many auto part store will read codes for free, please post codes
SOURCE: 2000 S-type Fail Safe Engine mode is intermittent.
change the throttle body posistion sensor and change the plugs if the throttle body was dirty the plugs can now be fouled out causing the problem the 02 sensor may be clogged as well from the cleaning try thid first this should work if not let me know ill tell you what else you can do hope this solves your problem.
SOURCE: Warning: fail safe engine mode
I do not know about a Jag. But the "fail safe engine mode " on my GMC means the Engine Controll Computer has quit working.
SOURCE: 2000 S TYPE Jaguar
This happens when the communication between the computers of the car systems fails:the connection is lost for a moment , which sends the engine and transmission in Failsafe mode; if you turn off the contact the computers reset and when you start it again they test the status of the connection before reengaging - they detects that the connection is fine and resume normal functioning.In the case of my Citroen it was between the engine and transmission computers - a cable connector has been damaged by a rock.
The only way to locate the origin of this problem is to check and reseat every single connector on the wiring loom.
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