Diagnostic Aids

Improperly mounted or loose steering wheel angle sensor.
The car should not pull in either direction causing the steering wheel to be off center while driving in a straight line on a level surface.
Confirm that all tires are of the proper size and that all are matching brands. Check and adjust all tires to the stated cold air pressure as identified on the tire placard. If a mis-sized or non-matching brand tire is present, inform the customer that in order for the vehicle stability enhanced system to function normally, tires need to be a uniform size and rolling diameter.