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Big John

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Big John last won the day on March 14

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About Big John

Profile Information

  • First Name
    John
  • Jaguar Model
    XF
  • Year of Jaguar
    2013
  • UK/Ireland Location
    Lancashire

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  1. Hi Brian Welcome to the club. First port of call with warning lights in the XF is the battery. These cars (as with all modern luxury cars) are a couple of dozen computers all chatting over several networks with a wheel at each corner. If the battery gets even slightly low it can trigger all sorts of random errors. Given we are still in a pandemic I imagine your driving has been limited to a fewer long runs so it could well be that the battery is a bit tired. It is also quite possible your car is still on its original battery and in need or replacement. If you don't have a voltmeter a litt
  2. Hi Peter That is fine because there was an event that made you stop and check, then proceed at slow speed to get home. The problem when used without TPMS is where it is a slow puncture and you come to need high speed braking and/or steering response only to find the tyre is actually deflated! In that scenario I am pretty sure the insurance would be an issue as you had modified the car from standard.... If RFT are not specified in your handbook as a fitment my advice would be do not fit them. Kind regards John
  3. Hi. My understanding is that you should NOT use RFT unless you have a car with Tyre Pressure Monitoring (and the correct rims) as it is not obvious when you have a puncture and can therefore be dangerous if you continue to drive at speed with no tyre pressure. Regards John
  4. Hi Darrell No need for a code. Mine is 2013 and checked direct with Jaguar when I got it. Kind regards John
  5. Hi You should always replace an AGM with an AGM. They are a very different design to the standard (including Calcium) wet cell. The main difference is their ability to recover from deep discharge which is what you get with stop/start use. In addition the cars charging system is designed for the difference so if you use the wrong sort you may well get a premature failure of the new battery if it is not an AGM. https://batteryuniversity.com/learn/article/absorbent_glass_mat_agm John
  6. Hi Basically white smoke is normally steam, so first look at cylinder head gasket or cracked block. Any sign of oil in the coolant or coolant in the oil (looks milky)? John
  7. Hi James Only useful thing I can add is here: http://www.jagrepair.com/images/Electrical/XFWorkshopManual/2010XFRWorkshop.pdf which is a really big file to dowload. Other possible sources that may help are here http://www.jagrepair.com/JaguarXFElectricalOBDIICodes.htm and here: http://www.jagrepair.com/images/Electrical/XFWorkshopManual/Battery and Charging System.pdf When you've looked at some of these manuals you will see just how many sources of the problem there could be. I would certainly need a garage to sort it 😞 Really hope you get it sorted. John
  8. Hi James. I am assuming that the problem now is the warning message. Have you watched the voltage with the engine running? A real problem with charging should flatten the battery pretty quickly. My gut feeling is that you have a software issue and basically it needs a Ctrl+Alt+Delete to clear the error message. To do this you either need the proper Jaguar computer or a garage with the Autologic system (and the know-how to use it properly). If it was me I would bite the bullet and get a diagnostic from a Jag dealer. I had an issue with my parking sensors / camera and have a really good war
  9. Hi James Just a thought but is the new battery an AGM? If previous one was a wet-cell that would explain its premature failure. John
  10. Hi James When you say you have put a meter on the terminals are you just measuring voltage at the terminals of the secondary and main batteries with the engine running? Secondary battery is normally not connected to the charging circuit except when charging so you are probably just measuring the secondary battery resting voltage. If the main battery voltage shows as 12.2v when engine running but then slowly rises after you turn off and lock the car the computer is almost certainly running down the battery doing a self calibration. When it gets to 75% of capacity it will then fully recharg
  11. Hi David This is the best resource I have found: http://www.jagrepair.com/JaguarXFElectricalOBDIICodes.htm John
  12. Also....Don't forget that both batteries need to be OK as the little one is there to ensure the voltage to the computers does not get problematically low during the stop or on restart and the computers are very hungry on power. 🙂
  13. Hi Depends what you are asking 🙂 If you are looking at buying this and it is advertised as an S then I don't think they all had a front badge but it should be described as an S on the V5. I think there is some confusion over the S and Sport designations, I know I am confused. Mine is a 2.2 200 Sport Sportbrake which means it is NOT an S but has the sport bodykit (as does the one in your photo - Main difference is more aggressive looking nose). I think the S refers to the high output version of the V6. It is a matter of personal taste but I prefer without the badges. If you do like th
  14. Hi Look into the fuel filler. You should see the "after" view below. If you see a yellow flap as in the "before" picture the mis-fuelling protection has been triggered. There should be a yellow plastic tool stored on top of the battery to sort it. It simply fits into the filler to flip the flap back up. It is also fitted to Land Rovers. Instructions here: https://www.rrevoque.org/diesel_misfuelling_protection_device-2963.html I think many car dealers use the same size fuelling nozzles for petrol and diesel so inadvertently trip the device which is designed to prevent you putting
  15. Hi My understanding is that the supply from the negative side of the charger should NOT be connected directly to the battery terminal. On the XF the Battery Monitoring System Module is integrated into the earth lead at the terminal. If you connect the charger directly to the negative battery terminal there is no "flow" through the BMS when charging from the ctek so the car does not "know" the correct state of charge. The CT5 (S/S) instructions say to connect the negative to chassis (which is what you would do if jump starting. https://www.ctek.com/storage/BB1B5B957F380A58AA7DC41C3D76EDDAE
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