Help with new (to me) gt mc temp reading - Maserati Forum
 
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post #1 of 5 Old 08-22-2018, 11:09 PM Thread Starter
 
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Hello all, after driving older cars for a while I finally got a 2012 Maserati Gran Turismo MC, the car only has 11k miles on it and seem to be in great shape except for one thing I can't figure out.

I live in dallas Texas were it's still over 90 degrees out at all times. Usually when I start my car the ac runs just fine and the outside temp starts at a at a close temp to what it is outside. Usually within 20 or 30 minutes or even faster the temp drops to 50 or even straight down to single digits. Normally I wouldn't care but this temp seems to also work in conjunction with the HVAC so that means the compressor kicks off and hot air starts to blow out. Even if I manually drop the hvac temp to low and full fan it's not that cold. This makes my car almost undrivable in the this Texas heat. I tried to look through fourms for similar situations and only see a hand full of similar situations but nothing that shows what actually fixed it. I see the mirror door sensor is fairly easy to replace but requires me opening the door which I don't really want to do if that's not the issue.

Figured I would try here since there are so many pros on these cars. I hate to take it to the dealer as I'm sure it will cost me a pretty penny just for the to look at it. I doubt my local mechanic would be able to figure this out easily as it seems to be an electric issue.
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post #2 of 5 Old 08-23-2018, 11:00 AM
 
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Sounds like ambient air temp sensor is bad in the mirror..I'm not positive you can get the sensor without replacing the entire mirror assembly...Jason

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post #3 of 5 Old 08-23-2018, 11:41 PM Thread Starter
 
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Originally Posted by [email protected] Enzo`s Atlanta View Post
Sounds like ambient air temp sensor is bad in the mirror..I'm not positive you can get the sensor without replacing the entire mirror assembly...Jason
Thanks, I'm pretty sure your right but that still involves taking off my door just to change the sensor when I'm not even sure it's the issue. Sounds like I may have to make a trip to the dealer unless someone has delt with this before.
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post #4 of 5 Old 08-24-2018, 12:05 AM
 
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You have to start somewhere at a certain point to repair an automobile...I`'m unsure of the guarantee you are looking for..Maybe a trip to dealer maybe your best bet, but even the dealer has to call people and say that didn't fix it...Call me crazy...If I have a problem with an erratic sensor then the first thing I would do is replace that sensor... Jason

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Last edited by [email protected] Enzo`s Atlanta; 08-24-2018 at 12:39 AM.
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post #5 of 5 Old 08-25-2018, 12:26 AM
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Typically an ambient air sensor throws a code when it's dead but if it's just intermittently failing may not. If you haven't already checked the car with a code reader you can at least give it a try to see if the code is pending.

I'm with Jason, I'd start by replacing the sensor unless you want to take it in to the dealer or a quality independent with the factory diag tool or equivalent for a full diagnosis. They may be able to see more with the right diag tool connected but usually the diag fee will cost a bit as well.

If you'd like, send us your VIN# by email or message and we'll be happy to quote the sensor you'd need to replace.

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