What is the reason for the car not moving when releasing the brake in D gear?
2 Answers
When the car does not move after releasing the brake in D gear, it may be due to incorrect sensor signals, a faulty shift valve, transmission failure, insufficient oil level, or issues with the handbrake and engine. Incorrect sensor signals: When the transmission shift valve position sensor signals are incorrect, the system cannot detect which gear the car is in. Faulty shift valve: The gear is not engaged properly, and the oil passage does not open. Transmission failure: The transmission's solenoid valve and electronic module may be faulty. Insufficient oil level: The transmission oil level is too low, or the internal oil pressure is insufficient. Brake lock-up prevents the wheels from moving forward, and pressing the accelerator may produce abnormal noises.
I've encountered situations where the car doesn't move after shifting to D gear and releasing the brake in an automatic transmission vehicle, which could have several causes. The most likely reason is the brake system being stuck, especially after parking in humid conditions or on slopes, causing the brake pads to adhere to the discs. Alternatively, it might be a fault in the transmission's torque converter, which fails to transmit power. Electronic systems can sometimes act up, such as when the hill-start assist function is activated, keeping the car stationary. Other possibilities include the handbrake not being fully released or unstable engine idling leading to insufficient power. When facing this issue, avoid hastily pressing the accelerator; instead, check the handbrake release status and the ground slope. If the problem recurs, it's advisable to visit a repair shop to inspect the drivetrain and brake systems to prevent more serious issues. You can also try shifting to reverse gear to see if the car moves.
