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Restricted perfomance dash message - 2001 Jaguar XJ8

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This warning can be flagged by lots of reasons you really need to get the fault codes out of the engine control module but the common causes i have found after working on these cars for a few years are air leaks after the mass air flow sensor, sticking throttle butterfly in the throttle body, the throttle itself, lamda sensors, and knock sensors, and because the temp gauge does not give you a true temp reading the engine could be overheating the clue to that is the rad fan always running

Posted on Apr 21, 2013


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Lots of things can cause this. Most likely it is due to an engine vaccumn leak from any number of gaskets. Your local dealer or mechanic can check for any faults stored in the car's computer (ECM). This will lead them to the cause of the restricted perfomance light.

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1 Answer

Jag s type 05. restricted performance mess. appear intermittantly

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