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Jaguar gearbox fault & transmission systems fault

Hello, my name is Eddie and I live in St. Louis MO. I purchased my 04 Jag X type in March of 2013 and it is Feb 2014. I have had an instance, maybe 8-9 months ago, where I'm driving normally and I slow down at a light. A "gearbox fault" & a "transmission systems fault" light come on and the car idles high and will not accelerate. I turn the car off and back on it idles high and does not accelerate again. Happens 1-2 more times. I restart the car again and as if nothing happened it drives normal. Neglecting the CEL that comes on and off periodically after that I push it off until "warmer weather." It wasn't a problem until recently, but this time in 5 miles of driving it happens 3-4x!!! I take it to Jaguar on Olive in Creve Cour Missouri and they barely diagnose it as a throttle body issue(6-7months ago). Now that the problem has increased I decide to unplug the battery and clean out the throttle body w a throttle body and carb. cleaner. I drive it to test it out again, SAME PROBLEM!!!! The throttle body is clean (I'm assuming) could it be a TPS or some other sensors around it? Should I just replace the throttle body or what? I obviously want this problem to go away but would also like the cheapest route available (at least to begin w/) are there any remedies or things I can do before I make a costly decision? I've been reading the reviews and there are problems similar but not any that are 100%exact. Thank you VERYYYY much! -Eddie

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  • 52 Answers

Sounds like a mass air flow meter problem to me. Carb cleaner is too harsh a cleaner for a mass air meter, there are specific cleaner for this. The unit maybe ruined. Replace the maf.

Posted on Mar 02, 2017


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Posted on Jan 02, 2017


SOURCE: jaguar x-type 2002 2.5L

most likely the ran it up on the lift and that triggers all these. you should be able to bring it any local garage and they should clear it. 

Posted on Sep 11, 2008

SOURCE: intermittent shut down of Jaguar XJR while running

The fault is intermittent - strikes without warning - and I guess if there are no error codes - so the fault is beyond the reach of the computer sensors - change your high tension coil.

Posted on May 27, 2010

  • 262 Answers

SOURCE: Starting last July 2010, my 2004 X-Type 3.0 Jaguar

change yor air flow sensor

Posted on Feb 01, 2011

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Check carefully ant wiring loom you may have moved to replace the shaft.

As you were only working on mechanical items, and just moving electrical systems, it is almost certainly a break in the loom or a faulty connector in that area. You may need to unwrap the loom a bit.

Hope this solves it for you.
Thanks for using Fixya!

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