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I would like to know if one initiator malfunctions what is the effect? I am going with the premise that it wouldn't set off the search of going wheel to wheel, on the car. There was a thread that showed an initiators wire had worn through on the body/bumper meet, and it was grounding.
Last edited by sony2000; Sep 18, 2025 at 02:25 PM.
This will probably be my last attempt at getting the TPMS functioning properly in this XK!
I received two initiators yesterday, will replace the original in front right wheel well and drive for a while. If I still get errors will install the second one. Test again. If still have errors will trace front wiring and confirm that there are no issues. Then, install the other replacement in the left front and test. Hoping that the RF unit is the culprit.
My reasoning is that when I take the car to a high pressure (hand held) car wash and wash the RF wheel well (front area) I almost always get a TPMS fault immediately. (yes I've tested washing wheel well by wheel well over the months, one one week and then one another week, the RF generally (will give an immediate error). I've been doing this for several years now!
Hoping this works, will install this weekend, fingers crossed.
wj
A few months ago after replacing a sensor I was randomly getting a "tire pressure not monitored" after a few days each time. My fix was as follows:
1. Go to tire dealer and have them to read out the 8 digit hex codes (like "8F5AB783") transmitting from each wheel. This is the sensors unique address. Write them down identifying the wheel they are installed on. These must be correct, worth putting them in your Keep File.
2. Start SDD and its TPMS sensor replacement tool. You'll eventually get to a screen that has all four wheel location listed and the hex numbers SDD "assumes" they have. All the hex numbers must match what they are actually transmitting. If not, correct the hex numbers in SDD to what you actually received. This happens when a transmitter is replaced and TPMS is not updated by SDD.
I did this 8 months ago, no failure messages since then. I think this might be the source of a lot of the "tire pressure not monitored" problems. My guess is that it requires a few drive cycles before posting the "not monitored" error, hence the few days between the problem visibility.
Hope it helps, Panthera
Last edited by panthera999; Oct 5, 2025 at 04:24 PM.
A few months ago after replacing a sensor I was randomly getting a "tire pressure not monitored" after a few days each time. My fix was as follows:.....
Kind of makes sense... just because the XK system SHOULD read the sensors automatically doesn't necessarily mean it always reads them correctly.
I spent way too much to get mine to work. Discount tire couldn’t get their ‘compatible sensors” to work. So, I bought Oem jag ones and that did the trick. But, I wanted to read actual vs,ye, so I got those external sensors that mount on the valve stems from FOBO. Oh yeah, the alarm went off a few weeks ago when I was in the house. Seems I got a slow leak from a nail. The FOBO threshold that I set triggered but thr Jag one didn’t,
Thr factory jag sydtem is lame. The sensors go into sleep mode and dont activate until the shells are turning, and it triggers at sime preset threshold.
The TPMS icon has become less annoying with the cooler weather an an increase of 2 PSI all around. Next month will be winter tire time, with their own mags.. Comparing the two sets may uncover new info. Also I am not too confident that my tire gauges are right on. For now, the lower PSI one, is winning out.
