How does a mechanic go about finding difficult freon or refrigerant leaks in the air conditioner?

Now the question was the air conditioning in his Sienna blows nice and ice cold in the front, but blows warm in the back. So here’s a couple of ways I would approach it .

There’s probably 80 different things that can cause a check engine light to come on and some of those things, the light will come back on very quickly. With some of those things, it may take multiple road test to do so.

So when your check engine light is on and you have a P03 series code so like a 301, 302, 306. That’s a misfire code and the 301 would be be cylinder, 306 would be cylinder 6, etc

We are in an Automotive Technician Crisis in the United States right now. So I thought maybe I’d share a little bit about my personal journey.