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Old 05-14-2012, 01:42 PM
Boland01
 
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Car will not go faster than 65 mph

A few weeks ago while driving home from a long trip my wife said our 2009 Altima CVT would not accelerate faster than 65 mph. She said the engine would rev up to around 3000 rpm with the pedal to the floor but wouldn't go any faster.

She ended up pulling into a gas station. Shutting off the car for a couple minutes and then restarting it again. The car ran normally the rest of the way home with no problems.

Since then I've put on over 500 miles without any issues at all. I know the older models have issues with the crank position sensor failing. I'm wondering if this could be the same problem. Anyone have a similar experience and hopefully fix? These intermittant issues are frustrating.
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Old 05-14-2012, 02:33 PM
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This might be the reason for your car's malady.

From the seldon read Nissan Altima Owner's Manual, in the Starting and Driving section 5, Driving the Vehicle, CVT:

High fluid temperature protection mode

This transmission has a high fluid temperature protection mode. If the fluid temperature becomes too high (for example, when climbing steep grades in high temperature with heavy loads, such as when towing a trailer), engine power and, under some conditions, vehicle speed will be decreased automatically to reduce the chance of transmission damage. Vehicle speed can be controlled with the accelerator pedal, but the engine and vehicle speed may be limited.
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Old 05-14-2012, 04:24 PM
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Quote:
Originally Posted by Throckmorton View Post
This might be the reason for your car's malady.

From the seldon read Nissan Altima Owner's Manual, in the Starting and Driving section 5, Driving the Vehicle, CVT:

High fluid temperature protection mode

This transmission has a high fluid temperature protection mode. If the fluid temperature becomes too high (for example, when climbing steep grades in high temperature with heavy loads, such as when towing a trailer), engine power and, under some conditions, vehicle speed will be decreased automatically to reduce the chance of transmission damage. Vehicle speed can be controlled with the accelerator pedal, but the engine and vehicle speed may be limited.
True...

But... Reason...

Thank the CVT.. but it has a safety mode.. when the transmission get's to warm the CVT kicks into 3 gear and doesn't come out of it till you turn the car off and reset the cpu. But the Car it normal.
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Old 05-14-2012, 06:59 PM
Boland01
 
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Good glad to hear. She was just getting out of Dallas heading back to Houston. going through Dallas is always stop and go with the emphasis on stop and idle.
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Old 05-14-2012, 08:44 PM
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In warmer climates, you might want to consider an larger aftermarket cooler for the CVT. Not a problem for us up in the mitten.
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