My girlfriend's dad helped me clean my engine. Well the end result left me with the traction control light coming on and off. It's off in the morning and after driving for a bit it turns I And my car starts hardshifting. Does anyone know what is the cause before I take it in

 

Hard shifting?

 

Car jerks when it shifts

 

I saw you posted somewhere else that you guys pressure washed the engine, maybe the connectors got wet worth a check