Tire Sensor issue

[UtahWJR]

Weird problem with both drivers side TPC sensors. Getting indicator light on dash. System Learning message has been displayed for a while. Dash display shows pressures for both passenger side tires but nothing for drivers side.

Shop says computer shows no fault codes and insists the sensors are fine else fault code would show.

Anyone have any thoughts?

2007 Boxster S.

6spd Manual

[JFP in PA]

First of all, you have a 987, not a 986, so this is posted in the wrong forum

The TPMS is two part system, senders in each wheel, and a receiver in the dash; so it has to be one of the other.

Who tested the system (dealer or indy)? Reason I ask is the type of tire sensor tester matters..........

[UtahWJR]

987 is new to me and I have a 986 as well so will need to get used to where I post.

Shop is an Indy where I bought the car so its still on their dime. If the pass side shows sensors does it stand to reason that the dash receiver is ok?

[JFP in PA]

I would bet that the other side sensors are on their way out, which is why I asked who did the tests. Age wise, your car is in the "zone" where the batteries in the wheel sensors start to crap out, which weakens the signal strength and the receiver stops seeing them. A sensor tester held near the wheel will still see them, but weakly, giving the false impression they are fine. If you hold the tester close, you get a signal, but if you back away slightly, it disappears (it is an RF signal).

If I am correct, the sensors need to be replaced (the battery is not replaceable). This requires dismounting the tires, spending about $100 per wheel for sensors, remounting and balancing the tires. And you can thank all the morons on the road that will not take five min. to check the air pressure in their tires once a month for the fact the federal nannies had to force the OEM's to install these totally unnecessary, expensive, and annoying systems in all cars...............

[RFM]

I can't more than agree with JFP over the full post, these are indeed expensive, unnecessary and trouble making non-things, indirectly dictated by the hands of irresponsible car users.

[black_box]

I love my TPMS..... I spent $150 to install an aftermarket unit, just so my grin can get bigger as I watch the tire temp/pressures rise ;)

[UtahWJR]

Black_box - can you supply info regarding aftermarket sensors?