question on faulty tpms

[mikerx5]

Did a winter wheel switch and the low air pressure sensor came on, double checked psi multiple times, still perfect.

my conclusion is a tpms is faulty, problem is with our 2013 35i there is no identifier of which one it is (surprising, actually).

Am I missing something. Have owned BMW before so I understand the reset techniques, this has gone of for 3 weeks now.

How can I figure out which sensor is bad? Just take it to my local shop and having them run it on computer? It is under warranty but i bought these oem winters wheels pre-owned so I assume they won't help me unless I had the ones that came with the car (wont change back until April due to weather).

thanks!

[ArmyX5]

I having the same issue, but that is because my winter tires do not have the sensor and are not run flat. If you installed a set of tire that are not run flat and do not have sensors, you will have the faulty tpms error. I am trying to code out this feature from my X6 now.

[mikerx5]

hmm - I will have to double check but I am 99 percent that they have the tpms, they are a factory set off a 2013, not sure non rft was even an option

[ArmyX5]

Oh, I see! You may have another issue. I am using a set from my X5 which do not have TPMS. I am not 100% sure, but I read in another forum that each set of TPMS is programmed specifically to each RDC module and only one set at a time can be used. Again, if you TPMS system works with one set of tires and does not works when you install a different set, then 1) one or more sensors are faulty or 2) the new set of tires need to be re-programmed to the RDC module.

[mikerx5]

OK that helps. Both sets I have are for a 2013 x6 so I assumed they were both plug and play.

[jfoj]

Most TPMS need to be programmed in by serial number to the vehicle.

1/2 of the equation is a tool like the Autel TS401 for about $150

https://www.jbtoolsales.com/autel-au...4_IBoC3UHw_wcB

This can read the sensor serial numbers, BUT you need either a Pro level scan tool or something like Reingold software to actually enter the serial number values in the car.

One cool feature of the TS401 is you can just walk around and check the tire pressure without removing caps, effectively just turning on the TPMS sensors in the wheels.

I was able to get my TS401 for about $75 shipped about 4-5 months ago, so I jumped on it. I do have a number of Pro level scan tools that will allow me to input the TPMS serial number into the vehicle then there is no problem after that.

[TriX5]

My 09 e70 give a fault each time I swap summer to winter and vv. However, hitting reset fixes it and it shows the correct location if there is a low pressure event.

Is it different on the later models?

[jfoj]

I have no idea if the vehicle will relearn the sensors or if the car can be programmed to have 2 sets of sensors in its memory.

Would be interesting to know, I have not tried this to see how many sets of TPMS sensors can be registered to the vehicle at one time.