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Get an alignment!
Stopped up cat convertor ?
Have the steering centering sensor tested for the stability issue.
possible clockspring issue behind the steering wheel.
On the left of this post is a Q&A section, at the bottom of that is a search window. Enter drive cycle then click Go. It will take you to a section to help you.
The pats module may be bad now, it will probably need to be scanned to find the correct fix.
Possible idle relearn, drive it around with stop and go's to let it relearn idle.
Some questions need the be asked, and some dealers need to be up front with the total cost.
Possible drivers side temp/blend door actuator issue.