Welcome to 2CarPros.
First, I need you to understand this vehicle isn't offered in the US. As a result, my technical information is very limited. However, I will try my best to help.
What I feel may be the problem is a component called a transmission range sensor. This sensor is what tells the vehicle's power-train control module (PCM) and the transmission control module (TCM) what gear selection you have made. If it is changing all the time, something may be loose at the sensor's location, there could be a wiring issue, or the sensor may be bad.
Because I don't have the specifics on this vehicle, I can't provide a pic of its location. However, if you follow the shift linkage on the transmission, the sensor is usually located where the two come together.
Let me know if this helps of if you have other questions.
Take care,
Joe
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Sunday, April 21st, 2019 AT 8:51 PM