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Hello, my name is ***** ***** I am a professional here at Just Answer. I have noticed that your question was not getting a response and thought I would see if you still need help with this.I apologize for the delay and I hope I can still assist you with this here. The code P0961 suggests that the CVT module has detected an issue of the Pressure Control A solenoid by noting that main pressure is out of range (either high or low). Code P0871 also suggests an internal pressure issue of the valve body or main pump pressure. When codes P0871 and P0961 are set together, the next step is to disassemble the unit and inspect for internal damage and/or metal contamination. Has this been done?
Unfortunately I suspect as much, you should be able to tell once you have a look. This Transmission is very common to have these issues and its usually always internal.