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What is the reason for the dual-clutch transmission not moving when in D gear without stepping on the accelerator?

2 Answers

AuroraLee

07/24/25 7:12am

It may be due to the engine's throttle opening being too small or insufficient fuel injection from the injectors. It is recommended to send it to a 4S shop for inspection and repair. Below are the relevant explanations: 1. Actuator signal: It might be related to the signal issues of the transmission's control system and actuators, where the shift valve is not sensitive enough, leading to incomplete shifting and failure to open the oil passage. 2. D gear: Also known as the drive gear. When the gear shift lever is placed in this position, the hydraulic control system automatically connects the corresponding forward gear oil circuit based on the throttle opening signal and vehicle speed signal. The planetary gear system obtains the corresponding transmission ratio under the control of the actuators, and automatically shifts up or down within the forward gears as driving conditions change, achieving the automatic transmission function.

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MayaRose

08/11/25 2:52am

I've encountered this issue a few times while driving a dual-clutch transmission car - the car doesn't move when shifted to D gear without pressing the accelerator, which is quite annoying. This usually happens because dual-clutch designs have an anti-creep function to prevent the car from moving forward automatically at idle, avoiding accidental movement or rear-end collisions. If the car has just started or the battery voltage is low, the clutch might not fully engage, and improper sensor judgment can cause it to get stuck. Additionally, when temperatures are low, the transmission oil becomes viscous, which can also affect responsiveness. I once checked if the battery connections were loose, and it turned out to be poor wiring contact - a simple fix solved the problem. If this persists long-term, it might wear out the clutch plates. I suggest warming up the car for a few minutes first. If that doesn't work, visit a professional shop to check if the control module needs resetting - don't delay as it could lead to more serious issues. Regular maintenance can help prevent this from happening.

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