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Old 12-03-2016, 11:51 AM
apb apb is offline
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Join Date: Mar 2001
Location: Houston, Texas
Posts: 450
Transmission 722.9 A200 code

For y3/8n4 component of valve body.

I have had this code for a couple years. It comes back when reset but I see no obvious driving issues.

Should I just ignore it?

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Old 12-03-2016, 06:13 PM
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Join Date: Jan 2012
Posts: 7,515
Running the y3/8n4 on the net comes up with " Y3/8N4 FULLY INTEGRATED TRANSMISSION CONTROL. 7G Tronic "

A shop manual would be needed to determine how to troubleshoot. The trans computer is in the pan on these units and is tied to the vin number so you can't just swap parts. ( MB calls this a theft related part and you need to prove proof of ownership to purchase parts. )

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