Just got all excited this morning that I fixed my PCM3 failure by replacing it with an AVIC-8000NEX and I get a TPC inactive warning on the dash. I had an issue 2 months ago and resetting the sensors with tire change made it go away for a bit. Durametric is reading Code 8003 System Disturbance. Is it time for new sensors? Car is a 2009.

 

with the durametric you can check the battery life at each of the sensors. Perhaps one of them is needing to be replaced.

 

After spending around $800 (including changing all sensors) with no resolution, I decided I'd had enough flushing away good wine money on the problem and had "a friend" disable the entire system. This has to be done using a computer/durametric. You cannot simply disconnect the mother module. I now check my own tire pressures about every other week, and I'm fine with that. If I have time for cleaning and vacuuming my car, then I have time to check my tire pressures while I'm doing it as well.

 

Get to someone who has a PIWIS. With the PIWIS you can check the exact battery life of each sensor individually...so you don't waste $ replacing ones that are still good.

 

Durametric pro does the same. Lists months and hours great tool has payed itself for me already.

 

isn't better to replace all 4 of them at the same time to save some labor cost ? as they might have similar battery life?

 

Coquitlam1 is correct . If the sensors are the original ones , go ahead and replace all 4 since they are 6 years old . Otherwise you'll be replacing a sensor every other month and get quite sick of it. The sensors get flaky and weak ,anything under 18 months is suspect . TPMS system is quite pricey to maintain having to replace sensors every 6-7 years , but if (disabled) and you pick up a nail and have an overnite leak , you can drive off the next morning with a severely low tire and not know it until you hit the freeway and the tire fails , damages the wheel ect!! $500 Mich PS2 , $1200 wheel , plus labor , tow bill . A properly functioning TPMS system will warn you before you leave your driveway ,and you can inflate the tire, look for nail , safely drive to repair shop while watching pressure .

 

+1 I did the same

 

I understand that disabling the TPMS is a easy money saving idea ,( my oldest son did this on his Sebring) , and you can certainly check your own air pressure with a handy gauge to ensure safety, but will you do this often enough? The reason we have the TPMS system since 2007 is because it's federally mandated after the effects of the investigation concerning the Explorer/Firestone rollover/tire failure . Low tire pressure was the major cause . If you have a tire failure on a Porsche , chances are you can maintain control due to superior handling ,stiff suspension , low center of gravity. I hated TPMS at first...but now I think it's great! And would even recommend it to pre-2007 cars to install an aftermarket kit !!