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After an alignment on my 2008 Sienna CE the VSC and Trac Off lights came on.

Turns out that the Steering Angle Sensor needed to be reset (before the alignment the steering wheel was not straight). I spent a few hours on the internet researching how to perform a zero point callibration myself and avoid another bill at the local Toyota dealer. I posted the procedure at the following thread.

http://siennachat.com/forum/index.php/topic,2175.msg15933.html#msg15933
 

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Thanks!
Very thoughtful of you and I'm sure it will help out someone in the future. :D :D :D 8)
 

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rpendell said:
After an alignment on my 2008 Sienna CE the VSC and Trac Off lights came on.

Turns out that the Steering Angle Sensor needed to be reset (before the alignment the steering wheel was not straight). I spent a few hours on the internet researching how to perform a zero point callibration myself and avoid another bill at the local Toyota dealer. I posted the procedure at the following thread.

http://siennachat.com/forum/index.php/topic,2175.msg15933.html#msg15933
That's great that you figured out what caused the lights to be on. I probably would have figured that one of the sensors was damaged or something. But, shouldn't the dealer have done this as part of the alignment? If anyone should have known about this, they should have.

I had our van aligned last year, they did have to make some adjustments but luckily no lights came on. If it happens in the future we'll know what is going on.
 

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Had all lights come on in my wife's '08. Hooked up the techstream cable/software and read codes U0126-Lost Comm with Steering Angle Sensor Module and U0073-Control Module Communication Bus Off. Erased the codes and they haven't come back in a day and a half of driving. I also have been noticing a slight 'clunk' in the steering wheel, suspecting the ISS is worn. I wouldn't mind replacing the ISS to get rid of that clunk, but wondering if it could be enough wear in that shaft to throw this sensor off and somehow trip this code?
 

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Unlikely that you would have sufficient free play in the intermediate shaft to trigger that. Typically they bind and get excessively tight. On a 10 year old van you have plenty of other front end wear that requires servicing and a Zero Point Cal to get everything synced up again.
 
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