Last weekend my front driver side wheel keeps alarming -4 or -6 psi pressure loss upon starting the car and driving off. After a few moments the sensor will read the correct pressure and turn off. I checked the tire and did not find any damage and my manual pressure gauge matched pressure reading from sensor after alarming goes away. This happened 4 times in a day. Anyone else have this type of issue and how did you resolve it?
Tire pressure sensor false alarming
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Did you check your cold tire pressures? You may have one slightly low tire. After driving a short bit, the tire flexing will tend to heat the tire and raise tire pressure (perhaps enough to shut off the sensor). Just a thought.
Otherwise, it could be a weak battery in the tire valve sensor. Easy for the dealer to fix.
Otherwise, it could be a weak battery in the tire valve sensor. Easy for the dealer to fix.
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Have a 2019 and just had the exact tire pressure problem. Did you ever find the cause?
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This may not be your issue but I found when I had my 3RS I changed the OEM tire valve caps to a decorative set and I started getting all aberrant false low readings. When I changed the value caps back to the OEM caps the problem was solved. Apparently, the OEM valve caps are an antenna that are important for accurate pressure readings.
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I don't know whether my experience is worth anything in this issue, but I have 2 decorative (plastic) caps and 2 generic plastic caps. The original (metal?) caps were misplaced (!...) during tire changes...
The system reports fine.
I find it takes a few seconds driving over 15 mph from a cold start before the TPMS starts reporting, but this is to be expected.
The system reports fine.
I find it takes a few seconds driving over 15 mph from a cold start before the TPMS starts reporting, but this is to be expected.
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I just put a set of decorative Porsche logo metal caps on my BS this Saturday. Zero aberrant TPMS behavior over the past three days (~150 miles).
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FWIW, my OE caps are plastic.
Maybe they changed design because of such issues with antenna caps?
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I was under the impression that the original ones were metal
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Not sure if our plastic caps were OE, but that would be my guess since it was a CPO (20" Carrera S Wheels) with only 1,082 miles at delivery.
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I have read most of the replies and having had the same problem. On my 2019 Cayman I have the aftermarket valve stem covers and thought that may be the problem bu instead I released 5 lbs of pressure and refilled the tires and the problem went away. I this is my 7th porsche and have been driving them since 1970. I also own a Carrera Cabrolet. I think by excercizing the sensor it solves the problem. You may want to try this before the dealer. Worked for me.
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A few days ago I started the car and got an alert that one tire was 4psi low which included the idiot light indicator. I toggled the bottom right stalk and found it reading all tires properly inflated. I checked with a manual guage and all were at proper psi. No warnings since. Give it some time and the gremlins will work their way out of the system.
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Or equally likely, you re-seated the valve seals when you released air and refilled them.
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Doesn't it come with the tire repair kit? (The valve stem tool...).
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Yeah, I think you’re right.
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