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Rough idle until warm

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Old Apr 11, 2018 | 12:46 AM
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AB3
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Default Rough idle until warm
Hello group I'm new here can any one tell me why do my 2004 S Type 3.0 always start rough on the first start of the day until it warms up temp gauge half way I also cannot get rid of the pesky p1646 code it returns as soon as I restart the car please please help
 
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Old Apr 12, 2018 | 05:04 AM
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Fix the cause of the code!

Usually it's the sensor.
 
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