Why doesn't an automatic transmission car move when in R gear without pressing the accelerator?
2 Answers
An automatic transmission car not moving when in R gear without pressing the accelerator may be due to the auto-hold function being activated or the electronic parking brake not being released. Auto-hold function activated: When the auto-hold function is activated, you need to press the accelerator deeply to release the brake, which can cause the automatic transmission car not to move when in R gear without pressing the accelerator. With the auto-hold function enabled, press the "AUTO-HOLD" switch to turn off the auto-hold function. The auto-hold function is an extension of the Electronic Stability Program (ESP) and controls the four-wheel brakes through the ESP. Electronic parking brake not released: When the driver forgets to release the electronic parking brake, it prevents unnecessary vehicle movement, leading to the automatic transmission car not moving when in R gear without pressing the accelerator. In this case, simply release the electronic parking brake. The electronic parking brake is a technology that uses electronic control to achieve parking braking.
Oh, I encountered this situation last year. I was reversing in the neighborhood, and after shifting to R gear, the car didn't move at all. It only started slowly backing up when I pressed the accelerator. Later, I took it to the 4S shop for inspection, and the technician said it might be an issue with the torque converter in the transmission. At idle, the engine speed was too low to provide enough power for reversing. If the car is parked on a slope or the vehicle is heavy, it becomes even harder to move. Another possibility is that the braking system hasn't fully released, such as the electronic handbrake being too tight and locking the wheels, especially common in rainy or snowy weather. Unstable engine idle could also be a reason; old air flow sensors or spark plugs might cause the idle speed to be too low. It's recommended to first check if the brakes are released, and try lightly pressing the accelerator or moving slightly forward before reversing. If the issue persists, take it to a professional shop immediately to avoid more costly transmission damage.
