7、8年变速油换过吗？自己先换一下变速箱fluid看看情况（最好同时换变速箱过滤器）。不理它换档可能会滑牙不听使唤。考虑换车。

P0765 DODGE - Underdrive Solenoid Circuit Fault

Possible causes
· Low transmission fluid level
· Dirty transmission fluid
· Faulty UD solenoid valve
· UD solenoid valve harness is open or shorted
· UD solenoid valve circuit poor electrical connection

The P0765 code is detected when the ECM detects an improper voltage drop when it tries to operate the solenoid valve.

Possible symptoms
· Engine Light ON (or Service Engine Soon Warning Light)
· Transmission will not shift gears

https://www.transmissionrepaircostguide.com/p0765/

What Repairs Will Fix P0765?

• Changing the transmission fluid and filter
• Replace faulty solenoid
• Repair or replace a faulty transmission pump
• Repair or replace defective transmission valve body
• Perform transmission flush to clean passages
• Cleaning corrosion from connectors
• Repairing or replacing wiring
• Flash or replace PCM/TCM
• Install a rebuilt or remanufactured transmission