PSM failure and steering wheel alignment

[cmjgolf]

Quick question before I call the Dealer Monday:

I have a 997.2 C4S coupe/6-speed with 3500 miles to date.

Recently noticed my steering has gradually rotated clockwise - so that now while proceeding straight ahead, the wheel is pointing to "0ne o'clock." At the same time, after ~ 30 miles on the interstate, the PSM failure light comes on (happened x 2 yesterday). After stopping the car and restarting the light is off again. I have not bumped a curb or hit any big potholes.

Could they be related? Anyone else see this? Anything in particular I should ask the Dealer to check??

Thanks - I have learned a great deal from you guys! :renntech:

[ericinboca]

Quick question before I call the Dealer Monday:

I have a 997.2 C4S coupe/6-speed with 3500 miles to date.

Recently noticed my steering has gradually rotated clockwise - so that now while proceeding straight ahead, the wheel is pointing to "0ne o'clock." At the same time, after ~ 30 miles on the interstate, the PSM failure light comes on (happened x 2 yesterday). After stopping the car and restarting the light is off again. I have not bumped a curb or hit any big potholes.

Could they be related? Anyone else see this? Anything in particular I should ask the Dealer to check??

Thanks - I have learned a great deal from you guys! :renntech:

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.

[wwest]

Quick question before I call the Dealer Monday:

I have a 997.2 C4S coupe/6-speed with 3500 miles to date.

Recently noticed my steering has gradually rotated clockwise - so that now while proceeding straight ahead, the wheel is pointing to "0ne o'clock." At the same time, after ~ 30 miles on the interstate, the PSM failure light comes on (happened x 2 yesterday). After stopping the car and restarting the light is off again. I have not bumped a curb or hit any big potholes.

Could they be related? Anyone else see this? Anything in particular I should ask the Dealer to check??

Thanks - I have learned a great deal from you guys! :renntech:

Partially deflated left front tire..??

[cmjgolf]

Quick question before I call the Dealer Monday:

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.......

Thanks

[ericinboca]

Quick question before I call the Dealer Monday:

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.......

Thanks

Car is brand new, right? I wonder if they did not torque one of the control arms correctly at the factory.

[cmjgolf]

Quick question before I call the Dealer Monday:

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.......

Thanks

Car is brand new, right? I wonder if they did not torque one of the control arms correctly at the factory.

Build date was January 2009 - I picked it up 7/12/09 with 34 miles on it. Nothing but rather sedate break in for the first 2000 miles and no "oops" since - other than bumpy MN roads. You're probably right again!

Thanks