Here's one I found:

 

Foolish?? Only to not follow the recommendation that is one of the first question generally asked by jaguar hotline to techs when dealing with general computer/or potential issues at hand. "did you do a hard reset?"
im blue in the face on this one, cannot count on all the fingers and toes of all the techs in the shop how many times this has fixed issues concerning modules. And it is not a band aid it is a fix just the same as rebooting your pc or modem when it locks up. Doesn't streach and reason why, yes because you dont need to have a longer than need cable other than to reach the terminal. In this day and age of plastic on everything and pennies no longer being made of copper due to cost. Theres no reason add weight or cost by making a longer than needed cable. The 10mm wrench in your hand you just undid the negative cable with, works real well at bridging the gap needed
foolish tech out

 

On my '94 XJS there is a wire somewhere behind the center console; you ground that wire and the code/light is gone and it won't return unless there is a new discrepancy. In fact, I now have a mini pushbutton switch at the front lip of the center glove box that does the same ECU reset (shuts off the code and the engine light) by grounding the reset wire.

Can't something similar be done with the X308?

Cheers,

 

No. You need to take battery terminal off etc.

 

You can buy a code reader for under $100 that has the erase feature . You can erase the code and this will shut off the MIL. If you do not fix the problem the MIL will come on again.

 

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Here is a little story that would, I hope, entertain you ;


My brother received this car as a gift from his associates. He used it regularly for about 3-4 weeks, then some strangest things happened ;

• One day, after washed his car thoroughly. Upon his starting then some idiot lights popped ;









• So, what has happened to the Brakes / Engine / DSC / Cruise ???? , he scrambled to find the accelerator did NOT work either. The Genius did not have any power ?
• The first thing came to his mind was my voice, “ Don’t You Go Near This Genius “… alas he did get the car already.
• The next morning, he called in his trusted mechanic who couldn’t do anything much except plugged in some reading, all the monitors said was that , “ FAULT – FAULT – FAULT “ …
• After the mechanic guy left, he called me and told me what happened. I then called several service men who only said, “ Bring the genius over ( by a slider truck ) and we will fix his majesty up for ya “

Then we started browsing through this Jaguar forum, and found several “ Fix it tips “…

There was a guy who said , “ Disconnect the battery on this damned thing, wait for a couple of hours, then start the car …… “

We did, but it didn’t work !

My brother is a fighter, he won’t give up, and he read on, the Jaguar forum !

One guy said try to clean the electric connecting points may be clean the MaF too…..

This was in the evening, my brother found one dealer that carried CRC MaF Spray Cleaner in the area, who would send it to him via an express horse.




Cans of CRC MaF Spray & Contacts Cleaner !






A gang of Express HorseMan, famously work in my town. Even Mark, our ex-Prime Minister joined them … on the part-time basis.






My brother called me up, said what he would do. Since it was late at night, I suggested that he should lite 7 incense sticks, and pray to the lord of Jaguar land that, with all the luck… his Jaguar S type R should be back to normal situation.

He did cleaned all the points + the MaF… wait for 2 hours, then restart the car… nada….. nothing happened.

He gave up, frustrated… and could hardly sleep.


Then the next morning came, he said he would give it another try… turned the key, it started…..

… and it accelerated… normal…..

.......... and all the idiot lights... GONE !


May the good GOD in Jaguar land bless my brother and his beloved S type R,… my brother promised he would never smoke in the car anymore !

Namaste ‘

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Tell your brother to fully charge the battery, it sounds like it is very low, hence the assorted warnings.

 

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Reply to... # JimboV8

Thanks, my bro did recharged the battery to Full level.

Thanks much !

,

 

Tell your bro to buy and hook up a Ctek battery minder. Costs about $60+ on Amazon. If he were to use it when the car is at home and idle he should have no more problems with Jaguar Gods.

 

Dear Ralph,

Thanks for the tips, please also tell Jaguar GOD that my brother would now behave ; never yawn when drive the thing ( after half an hour with his newest CLS 6.3 AMG ), not swear while put his hands on Jaguar steering wheel and never want to put the Jaguar hood ornament on to ruin the aero-dynamic any more, ... and that's the whole truth !

Life at 247 +



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There are literally hundreds of posts with the same issues that were fixed by charging or changing the battery so I am a little puzzled how none were found using Search.

 

I resently broke my fob and the key came out so I tried holding the key with some pliers and was not thinking about having the chip right next to the key when I tried turning it on and the computer locked me out how can I reset it without replacing the computer that is what the dealership wants me to do

 

??? You tried turning what key in what keyhole? These cars don't take ignition 'keys', only a NON-chipped key for the doors and boot.
Do you have a 2007-2015 XK or XKR? (2006-2014 in GB)

 

Welcome to the Forum, JaneSchulte1959! I noted that you don't have a signature and that your Public Profile shows that you're in the USA. Please read this thread and add a signature. That'll help us to answer your questions.
New Members Must Read!

It appears that you're in the wrong Forum, as the description of your key isn't for a 2007-2015 XK/XKR (X150). This is the OEM Jaguar X150 Smartkey: