I just went to my independent jag tech to see why I'm getting TPMS issues even after replacing the module and wheel sensors.

I also verified connection from the antennas to the receiver... No matter what, about once a month I would get a warning or malfunction on the dash related to TPMS issues.

So, since my tech has access to SDD, we first tried there... Following the instructions in this thread for the XF:

https://www.jaguarforums.com/forum/x...le-sdd-253109/

There are 3 options that need to be disabled

• Tire pressure monitor system
• Tyre pressure mode system
• Tyre pressure monitor display (X150 only)

Unfortunately, the CCF files are inaccessible via SDD without engineering mode, and my tech was hesitant to dig further and potentially break something.

But he does have the Autologic tool as well, which was developed by a group of Jaguar service techs who were unhappy being locked down by Jaguar's own software, and decided to create their own.

This tool has a much cleaner GUI, and the three TPMS options noted in the XF thread were very easily identified and disabled.

So far, I haven't received any warnings at all, so I'd call it a success. If anything changes, I'll update accordingly.

As always, it's important to note that in the United States the TPMS is federally required... But we can still get away with it as the inspection process doesn't check to see if it's been disabled (to my knowledge).

 

What I found:

”

In the United States, the National Highway Traffic Safety Administration (NHTSA) requires that all new vehicles sold after September 1, 2007 be equipped with a tire pressure monitoring system (TPMS). This includes passenger cars, light trucks, and multipurpose passenger vehicles. The TPMS must warn the driver when tire pressure is 25% above or below the recommended pressure for the vehicle, which can be found in the car manual or on a sticker on the driver's side door post. The TPMS must also provide a warning to the driver within 20 minutes of a malfunction that affects the generation or transmission of control or response signals.

TPMS is also subject to inspection in states that mandate vehicle safety inspections. If a vehicle has TPMS, it must be working properly. If the TPMS warning light is on, the driver could receive a penalty charge notice or fail an MOT test. “

also, it might be problematic with insurance if an accident can be identified as caused by low tire pressure, and they find TPMS disabled.

 

Indeed, the system is required by NHTSA. That being said, when you've thrown this much money at the problem, replaced all the modules, and the system is still not functioning properly by giving tire pressure warnings despite correct pressures, the limited paths forward include spending more time/money at the mechanic for diagnostic time (and more module replacements), replacing the entire system yourself, or disabling the system entirely.

If you have a TPMS warning light, even if the pressures are good, you will definitely fail inspection. The inspectors will hold up their reader to each tire, and make sure that the transponders are sending out a signal. That's all that's required to get a passing result for that line item.

I do not recommend skipping wheel transponders, even if they are not communicating with the vehicle. Tire install shops still use handheld readers to check pressures, and will not install new tires without working transponders.

While it's possibly that an insurance company could use SDD or Autologic tool to check if the TPMS system was disabled to deny a claim, I've never heard of it before. Maybe someone more familiar with insurance claims can comment.