'09 FEH, the defrost and A/C are not keeping engine running as it used to
 

Hello guys,
I have a 2009 Ford Escape Hybrid, few weeks ago I had a problem with the power steering and I had to replace the power steering sensor, but after that I noticed that turning ON the defrost and/or the A/C will not keeping engine running as it used to do before ! could it be a software/firmware issue because the tech guy who replaced the power steering sensor had to do some software and steering angle calibration.

Thank you