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hi there, I am Cam. Can I get your name please?
This is a sign of issues inside the transmission. P0700 is only a code saying there is a transmission code, and that code is P0894. That code, P0894 is one saying the system cannot adjust anymore. The pressure control and solenoid timing is controlled by the computer, and it makes adjustments as time goes on. Things wear a bit and it adjusts. When its reached the limits of its adjustment, this code sets, pressure defaults to high and you get this.So this is a problem inside the transmission, possibly a clutch but more likely the Torque Converter Clutch (TCC) . This you would not feel slipping rather it would show up like this.Diagnosis for this is done with a scanner that can control the transmission functions.