Jaguar XJ owners have reported 2 problems related to engine (under the engine and engine cooling category). The most recently reported issues are listed below.
Jaguar 2000 Xjr: while driving vehicle would suddenly display warning message that traction control / asc was not available and would go into a failsafe engine mode. Engine would then run very roughly and would not accelerate past 5-10mph. Mechanic diagnosed a fault code of p0121 which is addressed as a known Jaguar technical service bulletin for a "mismatched" connector to the throttle body. Internet research reveals that this is a very common problem experienced by many Jaguar owners that is known by Jaguar and constitutes a safety hazard. Jaguar knows that it mismatched gold and tin plated throttle body connectors and advised its repair tech's to replace only if customer complains! how will a customer know such a problem exists until it happens and it will happen eventually. Anything that may suddenly and without warning affect a vehicle's ability to accelerate is a major safety hazard. Jaguar should have and must issue a full recall of the affected vehicles before somebody gets catastrophically injured and/or killed. It costs in excess of $450+ to fix this known problem and Jaguar is allowing consumers to drive unsafe vehicles that may fail at the worst time. What would have happened if I was making a left turn and it failed at the wrong time and got broadsided with my wife or children inside?.
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all problems of the 2000 Jaguar XJ
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The contact states 2000, Jaguar Xjr was experiencing a loss of power. The vehicle has undergone diagnostic testing. The service dealer could not duplicate the problem. The vehicle started out with intermittent power difficulties, but it became too frequent. The vehicle jerked sometimes on initial acceleration from a complete stop and automatically changed gears. There have been several near misses on the interstate as a result of not being able to accelerate quickly. Updated 3/17/2006 -.