-- experienced an odd problem with the TPM option on the Cayman S yesterday and seeking a little advice:
-- got the 'flat tyre' warning & symbols showing on the dash - got concerned so checked all tires w/manual gauge - no significant pressure problems - all tires good - TPM sensors replaced pst year...
-- so a day later, all tire pressures still holding - but still can't get the on-board computer to clear the the faulty symbol icons.
-- reviewed owner's manual for possible reasons and only remotely applicable cause appears to be 'too many wireless transmitters' (as TPM system apparently operates via radio signal)...?
-- since no add'l wireless transmission from this end - stumped...
-- any suggestions welcome from those with similiar problem.
White Base Cayman, 20" Carrera S, PDK, Bose, Front/Rear Parking Sensors, PASM, 14 Way Ventilated Seats, Multi-Function Steering Wheel, Smoking Pkg., Model Deletion, Sport Exhaust Tips. 8th Porsche.
I had a similar situation recently. I made the tpms "relearn" the tire pressures by doing a reset through the stalk on the steering column and now everything seems fine.
2007 Cayman S, MT, Atlas Grey Metallic/Terracotta.
I have a question I cannot find the answer to. When I check how much pressure to add or decrease when the car is stationary it sometimes displays for the some of the wheel (mainly on the driver side) some prompt that looks like "Req". Ultimately the pressures needed appear but I am curious to this display.
Also is it really true you drain the battery leaving the TPMS in the display as the norm?
Sorry I forgot to add my right rear wheel takes a lot longer to display than the rest. The need pressure readout is there but the normal display takes about a minute or more. The tire has a plug but does not leak at all. Finally, do the tires have to be rotating to display the readings or just the ignition turned on?
PS. There is regular outside interference with the radio signal of these sensors that cause them to change from psi to dashes but they will return to psi after a couple miles. It could be your local fire house, another car passing using the same frequency, etc. At least that's my 6 year experience.
-- Seems like a number of glitches with TPM sensors (w/other makes as well): Don't believe that the sensors are continually 'streaming' tire pressure data - only upon start-up or stand-still when requested (or re-set) via steering stalk; Some tires do take longer for sensor(s) to 'learn' the pressure (shown by '--'); Once a problem surfaces - many faulty readings accompanied by the 'flat tyre' symbol and red '!' on dash - which remained for (2) days until finally clearing itself (w/pressure readings returning to normal) while vehicle was parked overnight...
-- and lastly, may be just a coincidence - but noticed that my mobile phone seized up & became unusable at the same time the TPM problem began...?
Comparing them to average speed or miles isn't really valid either. Averages also compute constantly whether displayed or not. The reset is justified, not because they stop working but because the averages become less useful when allowed to just accumulate and average forever. The averages won't change much when the accumulated data becomes so large that the averaged results using those large numbers become insignificant. That result could make it look like it stopped working but it didn't.