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A comment on Solving my truck’s TPMS sensor problem with the help of an RTL-SDR dongle. Parent comment

Re:Solving my truck’s TPMS sensor problem with the help of a... by mastax on Monday August 22, 2022 @02:40PM (#32555424)
Hah, my car does have real TPMS sensors but the dashboard display is such that the only thing it can say is a vague "low tire pressure" warning, with no indication of which tire or how low it is. I should get an OBD adapter one of these days.
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Re:Solving my truck’s TPMS sensor problem with the help of a... by el_benhameen on Monday August 22, 2022 @02:57PM (#32555643)
Speaking from experience, OBD will not necessarily help you here. Something has to put the TPMS data out on the CAN bus. The rudimentary system in my old Corolla does not do this, so the only way to debug a malfunctioning TPMS system is via sdr (or an expensive tool, or a trip to the tire store).
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Re:Solving my truck’s TPMS sensor problem with the help of a... by kube-system on Monday August 22, 2022 @03:29PM (#32556068)
Not just "the" CAN bus, but the one you're sniffing. Many cars have multiple busses that carry different traffic.
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Re:Solving my truck’s TPMS sensor problem with the help of a... by jakear on Monday August 22, 2022 @04:40PM (#32556907)
A basic mechanical pressure sensor is the much cheaper and more reliable system.
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Re:Solving my truck’s TPMS sensor problem with the help of a... by Johnny555 on Monday August 22, 2022 @04:57PM (#32557144)
How does a mechanical pressure sensor work? I've only seen electronic ones, how does the mechanical system warn the driver about low tire pressure while driving?
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Re:Solving my truck’s TPMS sensor problem with the help of a... by tedmid on Monday August 22, 2022 @02:57PM (#32555650)
Yeah that’s really frustrating. Different manufacturers have different offerings here. My Toyota has nothing more than the lame “low pressure” warning, but my wife’s company Chevrolet actually shows numeric values for all 4 tires.

Give us the data!!!

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