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Welcome to SCoA! Few things:

1. Check battery connection. A poorly connected battery will cause faults in the transmission.

2. Check battery health. A battery in poor health will also cause shifting issues.

3. Disconnect and reconnect the battery after 30 min. Sometimes problems occur just because the computers aren't the smartest thing in the world. A battery disconnect should reset them. My 2012 has done this a few times, in each time disconnecting the battery was the cure.
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