PSM Failure after having lowering springs fitted! Help!

[andynrx]

Hi

I just got my car back today after having eibach lowering springs and a custom exhaust fitted.

As a result the wheel alignment is slightly out, which I understand with porsches you must get laser alignment after fitting springs?

But now after a couple minutes of driving the car i get PSM Failure!

I've done a bit of searching around and this is what I understand as being the problem:

The steering angle sensor sends data to PSM/ABS system to help it determine when to intervene. The car can be out of alighment enough that the steering angle sensor and the other PSM/ABS sensors are sending conflicting info - so the computer shuts down PSM, hence the PSM light, and it thinks you have a steering angle sensor problem, when, in fact, you are out of tolerance in alignment.

An alignment with a steering angle sensor calibration should fix you right up.

Just back from my Dealer. You were correct! My alignment had "drifted" and they performed a 4 wheel alignment. In addition, the steering angle sensor was faulty. They replaced and calibrated a new sensor. All appears well as the wheel now points in the same direction as I am going (at least on the Interstate). With fresh snow here in MN, new winter tires, and PSM off ....well.......

Please can someone confirm this for me. If I get laser wheel alignment in a couple of weeks, do I then need to get an additional steering angle sensor calibration? If so, do I need to go to porsche or is there anyone else that can do this? I'm hoping once the wheel alignment is perfect it won't think to send the error message...

Thanks

[Loren]

Hi

I just got my car back today after having eibach lowering springs and a custom exhaust fitted.

As a result the wheel alignment is slightly out, which I understand with porsches you must get laser alignment after fitting springs?

But now after a couple minutes of driving the car i get PSM Failure!

I've done a bit of searching around and this is what I understand as being the problem:

The steering angle sensor sends data to PSM/ABS system to help it determine when to intervene. The car can be out of alighment enough that the steering angle sensor and the other PSM/ABS sensors are sending conflicting info - so the computer shuts down PSM, hence the PSM light, and it thinks you have a steering angle sensor problem, when, in fact, you are out of tolerance in alignment.

An alignment with a steering angle sensor calibration should fix you right up.

Just back from my Dealer. You were correct! My alignment had "drifted" and they performed a 4 wheel alignment. In addition, the steering angle sensor was faulty. They replaced and calibrated a new sensor. All appears well as the wheel now points in the same direction as I am going (at least on the Interstate). With fresh snow here in MN, new winter tires, and PSM off ....well.......

Please can someone confirm this for me. If I get laser wheel alignment in a couple of weeks, do I then need to get an additional steering angle sensor calibration? If so, do I need to go to porsche or is there anyone else that can do this? I'm hoping once the wheel alignment is perfect it won't think to send the error message...

Thanks

:welcome:

Yes, Porsche says the Steering Angle Sensor Calibration needs to be checked and/or re-calibrated with every alignment, suspension change, or after any accident.

[Nick_USA]

Yes, Porsche says the Steering Angle Sensor Calibration needs to be checked and/or re-calibrated with every alignment, suspension change, or after any accident.

.... and the calibration can only be done by a Porsche dealer with a PIWIS computer.