Driveable with p0344 code?

I have an appointment this Thursday, but I use my Jeep for work. Unfortunately, I've gone through 3 engines (believe it or not, none were really my fault at all) and I am NOT looking to blow through a 4th. Can I use this vehicle until Thursday without worrying about my engine too much?

There are no additional symptoms of the code that I can feel right now, but I fear that I had been driving with this code already for a month because of an emissions check engine light that stayed on, so I didn't realize another code had popped up. Any advice?