Hey Guys....... been a while since Ive been on (yea!) but recently the LF sensor said check air. I did, refilled it and it never went out (ok bad sensor Im thinking) but then later that day the other 3 all started stating check pressure. So after checking them all and making sure the pressure was perfect I decided to mess with it a little and upped the pressure to 38F-40R and drove it for like 20 minutes. Came back shut it off after a few hours, put the pressures back to 36-38 (R type with 20 inch wheels) it didnt change. The next day I decided to go 32-34 and see if that would do anything but no, just gave me a slushy ride, so its been back to normal for a last week. I did remove the battery cable and let it sit for a hour to see if that would do anything but nope.

So at this point I assume its a module and it will need to be replaced and reset by a dealer ? Anyone else deal with this on this car (X350)? Does it have to be reset or can I just swap it out ? FYI, its just reading check each tire not a system failure.

Thanks for any info in advance.

John

 

Hi John, do you know how old the sensors are. The battery life of the sensors are between 5 and 7 years at which time the sensors should be changed.
If you have access to a JLR/SDD mongoose you can check for codes.

Roger

 

Thanks Rchiv. I do not know how old they are Ive only had the car about a year and given its 10 years old it might be time. I do not have access to the mongoose reader which I should invest in since it will work with both vehicles and most likely whatever replacement vehicle I have. I used my (forgot the name but not cheap) code reader and it showed nothing.

 

Troubleshooting TPMS is a pain in the ****...

If the sensors in your car are the originals and approaching 10 years old, then chances are they are finished.

But it's very hard to diagnose without the specialised equipment, either the dealers tool IDS/SDD, or a dedicated TPMS tool like the Autel TS401. (there are plenty of other tools which have similar functionality).


If you need replacement sensors then be very careful about which ones you buy, there are different frequencies and versions. The X350 uses a different sensor to other Jag and Land Rover models.