What is the reason when the car doesn't move in D gear and pressing the accelerator doesn't work?

[SamanthaLee]

The reason why the car doesn't move in D gear and pressing the accelerator doesn't work is that the hill start assist is automatically activated. Hill Start Assist: Hill Start Assist, also known as Hill-start-Assist-Control. To prevent difficulty in starting on a slope, the hill start assist control temporarily (for a maximum of about 3 seconds) applies braking to all four wheels to prevent the vehicle from rolling backward. When starting on a steep or slippery slope, if the driver switches from the brake pedal to the accelerator pedal, the vehicle may roll backward, making it difficult to start. Configuration Reason: When hill start assist control is not equipped, the driver must quickly and accurately switch from the brake pedal to the accelerator pedal. However, when hill start assist control is equipped, because it can prevent the vehicle from rolling backward, the driver can easily start the car and operate the pedals with ease.

[SanEleanor]

I've encountered this situation several times - the car doesn't move in D gear and there's no response when pressing the accelerator. The most likely cause is a transmission system malfunction. Automatic transmission vehicles rely on transmission fluid to transfer power. If the fluid level is insufficient or the fluid is dirty, insufficient oil pressure will prevent power from reaching the wheels. Stuck components in the valve body or shift mechanism may also prevent proper engagement of D gear. If there's no response when pressing the accelerator, the throttle cable might be stuck or there could be an issue with engine output. First check some basic things: make sure the handbrake is fully released (as some cars have interlocking mechanisms), and check if any warning lights are illuminated on the dashboard. If necessary, call a tow truck for professional transmission inspection and repair. To prevent such issues, it's best to change transmission fluid on schedule and perform comprehensive vehicle inspections - after all, delaying transmission repairs leads to higher costs. Safety first - don't risk driving under these conditions.

[McReagan]

From the perspective of the electronic control system, a modern car not moving when in D gear and the throttle being ineffective is often related to ECU failure. The vehicle's control unit manages the transmission and throttle response. If sensors such as the gear position sensor or throttle position sensor are faulty and signals are not transmitted to the computer, the ECU will prevent the engine from outputting power. A malfunctioning electronic throttle can also cause this issue. My suggestion is to first use a diagnostic scanner to check for trouble codes. If it indicates a sensor problem, simply replacing it with a new one should suffice. Some cases are caused by insufficient battery power or wiring short circuits. Regularly updating the computer system and cleaning the sensors can prevent such issues, otherwise, sudden breakdowns can be very troublesome. In conclusion, most of these problems require professional technician diagnosis and resolution.

[AnnieMarie]

As a frequent driver, it's quite frustrating when the car doesn't move in D gear and pressing the accelerator doesn't work, but it might just be a simple issue. For example, if the handbrake isn't fully released or the brake pedal hasn't reset, the system will automatically lock the power. Also, check if the gear lever has slid into the correct position, as sometimes the gear isn't fully engaged. If these aren't the problem, there might be an issue with the transmission or drive shaft, such as internal slipping or aging, which would require a visit to the repair shop. My experience suggests not to panic; try turning off and restarting the engine first. Listen to the engine sound when pressing the accelerator: if the sound gets louder but the car doesn't move, it indicates a problem in the transmission part. Remember to address the issue promptly and avoid driving with it unresolved.