Is the engine compartment supposed to be steam.

Is the engine compartment supposed to be steam cleaned on a Prius hybrid car? My dealership decided, on their own, to steam clean the engine compartment and when I drove off, half way down the block, problem lights went on and it would hardly drive. I returned it immediately to the dealership. I am concerned that they damaged the electrical and computer components. A friend who is a mechanic told me that in his shop, they NEVER steam clean the engine compartment on a hybrid car for that reason. Your advice would help me greatly.

I went in for an oil change, inspection and brake change.

Thank you,

Karen --