Hi, new to HPtuners and tuning in general, I have recently connected the MPVI2 interface to my Chevy HHR 2.4 (manual trans) to "read vehicle" with VCM Editor (version 4.4.4).
Reading actually worked fine (engine was off), but it gave me quite a scare: the Check Engine light came on during reading and the car info display showed "Engine PWR Reduced" and then "Engine Disabled". The engine wouldn't start until I removed the car keys, locked the doors, unlocked the doors and then tried to start the engine again, which fortunately worked.
Is this known behaviour? Do I have to brace myself for other surprises when writing (haven't tried that yet)?