Reasons Why an Automatic Car Doesn't Move When Pressing the Accelerator in D Gear
2 Answers
When an automatic car doesn't move after shifting to D gear and pressing the accelerator, it is likely caused by the following reasons: 1. The transmission shift valve position sensor signal is incorrect, preventing the vehicle from recognizing the current gear; 2. Issues with the shift valve, causing incomplete gear engagement and failure to open the oil passage; 3. Malfunction of the transmission solenoid valve or electronic module; 4. Insufficient transmission fluid or low internal oil pressure; 5. Brake lock-up, preventing the wheels from moving forward and causing abnormal noises when accelerating; 6. The handbrake is not released or not fully disengaged; 7. Engine failure;
I've been driving automatic transmission cars for over a decade. When encountering a situation where the car doesn't move when pressing the accelerator in D gear, I initially thought it was a major malfunction. However, several experiences later made me understand the common causes. The most frequent issue is the brake not being fully released or getting stuck, sometimes due to the electronic parking system not disengaging properly or hydraulic problems. It could also be a transmission issue, such as a faulty gear position switch or damaged torque converter, which prevents power transfer. Another possibility is engine ignition problems, like low oil pressure or spark plug issues leading to insufficient power. Regular recommendations include checking if the foot brake is properly released before driving, ensuring the transmission fluid color is normal (replace if contaminated). Routine maintenance should include inspecting sensors and computer systems to ensure the vehicle responds promptly. Don't underestimate these minor issues—they can all cause the car to stall and pose safety hazards. It's best to have regular professional inspections.
