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Discussion Starter · #1 ·
So my transmission went out in my 1999 Volvo C70 2.4L Auto. I had the transmission replaced by a local shop. They put in a used one. Now I have the vault code P1618. The shop said it had to do with the "input speed sensor signal" but after some searching it seems like this could be a TCM to ECM connection error? What I'm wondering is if there is anything special this mechanic missed when making the swap? Any help is much appreciated.
Thanks.
 
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