This car is DI, Distributorless Ignition, so disregard the comment about distributor cap and rotor. The sparkplugs are a possibility though, be sure to use only the approved Bosch sparkplug, F8DC4 gapped at .032", torque to 29nm. I would go along with the motor mount theory as well. Check the plugs first, then have the motor mounts inspected, there is a gap than can be measured between the mount and subframe to tell if they are worn out or not.
Don't worry about the OVP, I'm not 100% sure this car has one, and if it did I've never heard of it causing a complaint like this.