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Based on your description, the most common cause of the problem you are having is a defective instrument cluster, however with the PO705 code I would double check the DTR (Digital Transmission Range) sensor and it's connectors for any possible damage or misalignment of the sensor. If you need further instructions let me know.
OK thank you
Can you tell me where the DTR sensor is located?"
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If you need more help let me know.