So after so much reading about the TPMS on Jaguar Tech info (I don't know who the hell wrote that but... ) I decided to explain how the TPMS works in a short version keeping only the useful information (in my opinion the rest is either irrelevant or repetitive). So if you have a problem with the TPMS on your car this should definitely help out. I also gave a link with all the trouble codes.

jaghelp.com: Jaguar XK (2007 - 2009) Tire pressure monitoring system (TPMS)

Comment for questions!

 

The question for me remains, why?

It is and always will be, the responsibility of the driver - a human being - to check the road worthiness of his or her car and not the electronic wizardry that is prone to failure to due point something of a drop in voltage from the battery.

These cars are fantastic but I wish they would just leave all the rubbish out of them. We might then have a car that doesn't eat batteries for every meal.

 

Jim, not sure how your response is relevant here. The issue is not that people do not check their tire pressure and solely rely on TPMS for that but that Jaguar's TPMS system is "quiet shitty" if I may say so and we have plenty of threads with people having "tire not monitored" warnings and "TPMS module not available errors".

Those are random and recurring big splashing red and amber warnings on your dash.

My XF is cursed with one TPMS (front/left) sensor constantly throwing tire cannot be monitored warnings (has been replaced) and TPMS module not available errors (software update done and module replaced) and I am still receiving both errors/warnings randomly.

This is extremely frustrating as you lose other information on your display when the warning is displayed, your dash is blinking, you become desensitized for warnings in general because subconsciously you say "aaaahh it's the dang TPMS" ... I already told my service adviser to disable the entire system ... which they are hesitant to do.

 

Hahahahaha let him rant hahahahahaha.

yeah I know people rely too much on all this crap I agree but hey.... pay to have it disabled and move on boss.

As a mechanic I see so many things that blow my mind. I had a girl yesterday that her car was being towed in because it shut off. She was driving WITH NO OIL. I mean NO OIL. not a little bit of oil, not low on oil, but NO OIL. this is the second time she does this. I put oil on the car new filter and the sucker starts again (and sounds shitty but the sucker moves). I tell her you can't keep doing this and she looks at me and she tells me (GET READY!): "But I'm a girl".

Like wtf does that mean?

hahahaha I ended up ranting myself

 

Allow me to clarify. If, as you put it, the system is " quite shitty" and you " become desensitised to warnings" then why have it?

The relevancy is, what more important warnings are people ignoring because they have become desensitised to this one.

If it is not that people aren't checking their tyre pressures, then I ask again, why have it?

Thank you Daxter, you have just proved my point.

 

Oh I am with you - no need for a TPMS system, it is clearly the nanny state that puts this in place and creates a falls sense of security when there is literally none with a TPMS system.

It will not detect a slow leak that dangerously deflates you tire over the course of days if the drop in psi stays within the parameters of the TPMS not to be triggered and of course it alerts you "too late" of a blow out.

The system itself is complete nonsense ... I am with you. But in all my other cars it has been a non issue, non intrusive system that I never notice. Here in the Jag it has been infuriating at the very least. Why they could not just buy a functioning system off the shelve is beyond me. The same with the infotainment system, terrible.

The first company that is able to just mirror you smart phone to a larger screen with controls on your steering wheel or an easy to use knob in the center console will win.

Use the smartphones phone function, music, web interface and navigation.

 

Keep in mind:

It is a violation of federal law to make a TPMS non-operational.


I seriously doubt that any Jaguar dealer will disable a working TPMS system. They just might get busted. It would be a huge risk to start disabling TPMS due to the annoyance of warning lights on the dash.

 

Nanny State govt regulation and it's not legal to disable it. Do a Search and I think you'll find it was the result of some batch of tires that blew out or threw their thread and the govt stepped in and 'saved' our butts by demanding after such and such date all new cars would have a TPMS.

Once upon a time I had TPMS problems with my XK. I know from where your coming from. Waste of time even thinking about it.

 

Here's some enjoyable reading:

Federal Motor Vehicle Safety Standards; TPMS; Controls and Displays. Final Rule.

 

I never really gave much thought to this. So the general consensus in the forum seems to be that the TPMS makes people worry less (as if they worried a lot before).

So what do you guys think would be a true solution?

In my opinion a stricter driver's licence test, one that would make you change a spare, know how to check your tires, oil and coolant, etc?

Any other ideas?

 

The TPMS sucks, the one on my Range Rover(sure the same as the Jag) comes on all the time and the dealer can't find a problem with it. I check my air pressure weekly and eyeball the tires every time I get in it. Still get a light that comes on 75% of the time while driving for no reason. One day its on all day, then someday its intermittent and other days I never see it. One day it may come on for a reason do you think I'm going to pull over and check it? UM no because its always been wrong and has never even once been correct or worked even as designed.. The TPMS in LR/Jags is pure junk from 1995.

 

To the veteran driver who was brought up when none of these features were available and after the service stations made you pump your own gas these are just convenience options. It was all in how you were trained and bought up when you 1st started to drive. When i started I was instructed by my father to check oil , water , tire pressure and windshield washer once a week. I learned how to change the oil and filter every 3000 miles and to wax the car once a month. Every year I would flush the antifreeze and drain and fill the transmission and rear end. I was taught to change plugs (gap) and install points and condenser . And on and on not to mention both changing a flat and repairing the inner tube. So now my kids just have to look on the dash to check the tires and also to check their oil and know when to bring it home for me to change , LOL. By the way I still am uncomfortable with not having a dip stick , hahaha.

 

If you are going to have a TPMS system it should work correctly. My tire pressure gauge in my glove box works just fine as I can't trust what's in the car. If it were similar to what's in a Porsche or a Buick for that matter (and many other cars) that tells you the exact pressure in real time I would trust it a bit more. At least If you see pressure declining you know you have a slow leak.

I had a Buick something for a rental and I could see the right front loose pressure as I drove, 1 PSI every 15 minutes... Thats obviously a slow leak so I dropped off the car and got another.

Were this LR/Jag we would see lights intermittently that are all false positives then one day have a flat, probably with no light.

I have not problem with idiot lights, but they are not to be relied upon unless you can see the figures behind them. If I see the light I should be able to somehow check the numbers behind it. If a coolant light goes off what the reading? Is it 250 overheating or a number thats totally off which is probably a bad sensor.

You should know how to check your air, oil, air filter and other vital fluids at certain intervals if not take it to someone who can like the dealer and they can perform one of their 2.71 billion point checks.

The girl that drove her car in with no oil is an idiot... No alarm, dipstick, engine light can help stupid. She learned the hard way.

 

Yep just teach you kids to do it the right way. BUT!!!!!!!! I was not brought up that way... and when I bought a car I also bought (lolz) a book called "Car repair for dummies". Now I am a ASE certified Jaguar and Land Rover specialist with 7 years of experience and a trade school degree but I still have the book in my house. I can proudly say that nobody taught me: "hey you gotta change your oil" But i spent five thousand bucks on my first car and I wanted to take care of it (because u know... I have a fuc***ng brain). I chose to do the right thing and the effort. Teaching your kids sometimes is not the right way, I think I did the right thing because nobody bought the car for me... I paid for it. So the right thing to do is not give ur kids shi* in my opinion.

 

daxter1987
Thank you for the information on the TPMS. I found it very useful and I assume the same information as to how the system works applies to the XJ as well. You will see my post where I am stuck in a quagmire having 5 new sensors (Echlin 921140 from Napa) installed by the Florida Tire dealer which were replaced when new tires were purchased. Tire dealer scanner indicated that sensors were operational. Then replaced module in Toronto from Jag dealer, but TPMS fault message still appears on dash. Will be in Florida in October and will have tire dealer check sensors again....may have to bite the bullet and install jag sensors. See my post for more details . Appreciate the info before incurring further cost and possibly more aggravation.
Murphman

 

Any major Tire Dealer should have the scanner to read the TPMS. No need to wait to go to Florida.

 

Mandatory TPMS is Ford's fault. They specced the Explorer to run with 26 psi on rubber that Bridgestone TOLD THEM should run at least 32 psi. So, start them low, subject them to the all too common neglect, then add some desert heat and driver panic and your are off to the races.