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I pulled the code u2106- lost comm. w/trans system. what does this mean?

(2000 Saturn LS)
in Columbus, OH on April 05, 2013
my problem is the car idles good and takes rpm in park but once in gear it wont move or take rpm.
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Popular Answer
of Bill's On Broadway on April 05, 2013
When you have u code means the class 2 network is having comuation problem with the computer in the network, You can not get to this with a scanner, there are testing to be done to fix this, Best advice you should send is to a shop, to some who understand the class 2 network on a car, most shop dont understand this, We do these kind of repair.
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