TPS do not register

[baker_g]

Have recently had 4 new TPS sensors installed in my 997 MY08 C4S at local Porsche Indy. Tire pressures are displayed but system will not store the registration data after being "Set" through console or PMIS. With each ignition start receive message "Wheel change? Input new TPC settings". followed by flat tire and red error lights. Have driven car extensively between settings for system to "learn". Indy tried a known working control module without different result. I do not know mfg. of sensor units although shop has indicated that they have used them before in other vehicles without problems. Everyone is stymied frankly. Would appreciate any suggestions. Thanks.

 

[bgrpph]

After installing new sensors from tire rack-car would not recognize them- issue was the old sensors were in the trunk- soon as i removed old sensors all was fine.  

[baker_g]

Thank you for the feedback Bgrpph. I can see how it would be easy for that to happen. I have confirmed however that the old sensors are not n the vehicle.

[dphatch]

Are you sure the frequency was 433 Mhz ? Installer should be able to verify what kind on sensors where installed. Hook it up to a

Dura metric and see if it will recognize the sensors and then Get a reading on the battery life remaining of each sensor. If the y won't read sensors are not the correct type.

[baker_g]

Thank you dphatch,

 

Dura metric indicates three things: 1) tire pressures read accurately and battery life is 86+ months, 2) error code 8003 "system disturbance" and 3) System Information screen does not update.

 

Prior post http://www.renntech.org/forums/topic/42721-tpms-fault-8003/# indicates that this error indicates PCM2 MMI Operating buttons are jammed and is therefore likely a general "system disturbance" code that applies to multiple modules. 

 

The durametric system information screen will not update so I'm not sure whether sensor frequency is part of that data. Will return to shop with a TPMS tool to confirm correct 433 MHz sensors have been installed and update post. Thank you.

[Mijostyn]

Baker, I had exactly the same problem when I replaced my sensors. The car should auto learn the new sensors. You do not need a PIWIS. You have to go through the whole routine of programming the car for Summer vs Winter wheels, full or partial load pressure etc.

The routine is confusing as to whether you push or pull the control stalk. I was screwing it up for 2 days before I finally went to the manual and got it straight. Maybe I'm dim witted but it seems like they could have done this in a more logical way. Hope that does it for you. These electronic issues can be a royal pain. You have the right sensors as the Durametric can read them through the car.

Edited September 4, 2014 by Mijostyn

[baker_g]

Problem  has been solved. Service Tech found that the instrument coding was incorrect (not sure what that means), and indicated that it must have been mistakenly changed when programming for the new sensors. Apparently this prevented the TPMS module from remembering the settings and giving the warning lights and setting the error code 8003 "system disturbance". Thanks to all who commented.