If you mean non operation of the a/c as in it's off then no of course not. The -40 is from a faulty outside temp sensor. It may affect it while the a/c is on but who knows. My control system had no problems when it was bad last year. Others have had problems were the air is not cold enough because of the faulty unit but it was usually too sporadic from what I heard. Just replace the temp sensor. It's under the right side of the front bumper just in front of the right wheel as shown in the pics . I'd suggest you get OEM though because most aftermarket ones read about 5-10 degrees hotter or colder than usual. You'll spend about $50 maybe a bit more but it's one of those things were it's better to stick with OEM.
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