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I have a 2008 Nissan Altima that the Service Engine Soon light came on. I took it to have it checked and it said Code P0710 Transmission Fluid Tempeprature Sensor A Circuit. Can someone tell me what this does and if it's a serious problem that I can put off repairing. Does it need to go back to dealership for repair or can a good mechanic do it. Thank you
 

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I have a 2008 Nissan Altima that the Service Engine Soon light came on. I took it to have it checked and it said Code P0710 Transmission Fluid Tempeprature Sensor A Circuit. Can someone tell me what this does and if it's a serious problem that I can put off repairing. I'm a school teacher so I'm not back in school yet. Thank you
Hello,

Well it is very serious issue but not life threatening for the vehicle. The sensor reads the fuel temperature of the transmission fluid which is passed on to PCM or the brain of the engine. Which in return could vent or take some actions to cool down the transmission fluid, if the sensor isn't working it could cause your engine to over rev your transmission and damage it. If you've a nissan with a cvt (2007 or newer) it's even more damaging.

If you are not doing heavy driving, or racing people down the street, it shouldn't cause any damage. Just don't floor it loll
 

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Discussion Starter #3
Hello,

Well it is very serious issue but not life threatening for the vehicle. The sensor reads the fuel temperature of the transmission fluid which is passed on to PCM or the brain of the engine. Which in return could vent or take some actions to cool down the transmission fluid, if the sensor isn't working it could cause your engine to over rev your transmission and damage it. If you've a nissan with a cvt (2007 or newer) it's even more damaging.

If you are not doing heavy driving, or racing people down the street, it shouldn't cause any damage. Just don't floor it loll
Does it need to go back to dealership for the repair or can a good mechanic do it. Thank you
 

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Hello,

Well it is very serious issue but not life threatening for the vehicle. The sensor reads the fuel temperature of the transmission fluid which is passed on to PCM or the brain of the engine. Which in return could vent or take some actions to cool down the transmission fluid, if the sensor isn't working it could cause your engine to over rev your transmission and damage it. If you've a nissan with a cvt (2007 or newer) it's even more damaging.

If you are not doing heavy driving, or racing people down the street, it shouldn't cause any damage. Just don't floor it loll
1) "Well it is very serious issue but not life threatening for the vehicle" You know this how? How do you know that overheated CVT's aren't "life threatening"?

2) "The sensor reads the fuel temperature of the transmission fluid which is passed on to PCM or the brain of the engine." What? What is "fuel temperature of the transmission fluid"? Actually, the sensor sends information to the TCM, Transmission Control Module, which is the the brain of the transmission. The PCM has nothing to do with P0710.

3) "Which in return could vent or take some actions to cool down the transmission fluid" Vent? How is this possible, and how does it occur? How and what cools down the transmission fluid?

4) "if the sensor isn't working it could cause your engine to over rev your transmission and damage it." What? How can the transmission be "over revved" because of the sensor? Isn't the CVT transmission somehow hooked/connected to the engine of the car?

5) "If you've a Nissan with a cvt (2007 or newer) it's even more damaging." Congratulations! You did correctly answer this one. The car in question is a 2008 Nissan Altima.

6) "If you are not doing heavy driving, or racing people down the street, it shouldn't cause any damage. Just don't floor it loll" What is "heavy driving"? Are you saying it is permissible to race people "up" the street, but not "down" the street, as long as you don't "floor it"?

P0710..Nissan. Transmission Fluid Temperature Circuit Malfunction.
  • Faulty Transmission Fluid Temperature Sensor
  • Transmission Fluid Temperature Sensor harness is open or shorted
  • Transmission Fluid Temperature Sensor circuit poor electrical connection
When is the code detected?
Transmission Control Module (TCM) detects excessively low or high voltage from the fluid temperature sensor.

Possible Symptoms
  • Engine Light ON (or Service Engine Soon Warning Light)
  • Possible shifting problems
The ATF (Automatic Transmission Fluid) Temperature Sensor converts the fluid temperature into a resistance value. The sensor resistance changes with the transmission fluid temperature. As the temperature becomes higher, the sensor resistance decreases. The Transmission Control Module (TCM) monitors the ATF (Automatic Transmission Fluid) Temperature Sensor signal. The TCM sets the OBDII code when the ATF (Automatic Transmission Fluid) Temperature Sensor signal is out of factory specifications.
 

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Does it need to go back to dealership for the repair or can a good mechanic do it. Thank you
Either one...your choice. But...you do need to get it checked out.

It could be a malfunction of the sensor, or you could have a transmission cooling problem. Excessive heat kills transmissions.
 

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Either one...your choice. But...you do need to get it checked out.

It could be a malfunction of the sensor, or you could have a transmission cooling problem. Excessive heat kills transmissions.
And we all know, it does not take much to kill a CVT.
 

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Why else would they "upgrade" to CVT, to get newer cars faster, funny that they thought it would be the same Make.
You have to wonder how many new customers, and repeat customers Nissan lost because of the lousy CVT.
 

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You have to wonder how many new customers, and repeat customers Nissan lost because of the lousy CVT.
I know one for sure. I would have been all over the new Altima with a 3.5 and a non-cvt....Now I get neither
 
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Altima FTW
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Tranny most likely overheating. Do you hear whining sound while accelerating or decelerating after car has been on a while? Servicing the tranny fluid every 30k does these transmissions wonders and this is what 95% of people neglect to do. CVTs run under thousands of PSI oil pressure to work, this will increase fluid temperature coincidentally causing fluid deterioration quicker than a non CVT. There is also an OEM transmission cooler designed for these cars that bolts right up infront of the condenser from Nissan. Cheapest thing to try at this point would be to have fluid, primary and secondary filters changed and install the OEM cooler. If your code comes back after you'll need a new or overhauled tranny. Parts and labor for that your looking at $3000 to $4000 easy. My 07 Alti just hit 170k with zero tranny problems thanks to a little maintenance and the additional OEM cooler install.
 
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