S-Class (W221) 2007-2013: S 320 CDI, S 350, S 450, S 500, S 550, S 420 CDI, S 600

TPMS errors but sensors read ok

Old Jul 15, 2025 | 07:06 PM
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TPMS errors but sensors read ok

I’m having a light which clears but keeps coming back. I’m getting, “ implausible” My sensors read correctly, when I put my TopDon in the port and read the codes, it shows everything is working but I can’t keep the light from re-illuminating. I’m completely at my wits end. Has anyone experienced a similar issue? My only thought is, the monitor itself possibly defective? I’d buy another TPMS module but I’m understanding, it would it have to be reprogrammed to my VIN? I did replace the one that was reading at 49% but still the light keeps illuminating. Anyone have any thoughts?





Last edited by 2014CL600; Jul 15, 2025 at 07:22 PM.
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Old Jul 16, 2025 | 02:05 AM
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2006 W221 S500L M273
What are the relevant DTC's?
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Old Jul 16, 2025 | 05:02 AM
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go buy some real diagnostics...

mate mentioned this Brand a month back as the dogs wotsits - I checked out his site and thought - great go buy a real tool
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Old Jul 16, 2025 | 10:29 AM
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Refer to below

Last edited by 2014CL600; Jul 16, 2025 at 01:45 PM.
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Old Jul 16, 2025 | 01:40 PM
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This is what it said but now all my tires have the exact air pressure and yet the light pops back on.  All reading at 100% and receiving and transmitting signals with no unknown signals.  I replaced the front RH sensor, which brought everything inline with each other
This is what it said but now all my tires have the exact air pressure and yet the light pops back on. All reading at 100% and receiving and transmitting signals with no unknown signals. I replaced the front RH sensor, which brought everything inline with each other
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