What to Do When Gear Shifting and Accelerator Malfunction?
3 Answers
The handling method for gear shifting and accelerator malfunction is: 1. Release the accelerator pedal; 2. Shift to manual mode and manually downshift from high gear to low gear sequentially; 3. When pulling the handbrake, hold the release button and pull the handbrake continuously without locking it; 4. After the vehicle stops, shift into park. The reasons for gear shifting and accelerator malfunction are: 1. Impurities in the brake master cylinder or poor sealing; 2. Failure of the vacuum booster pump; 3. Dirty brake fluid; 4. Oil leakage from the brake master cylinder or wheel cylinder; 5. Air leakage from the air reservoir or pipeline interface; 6. Severe overload; 7. Carbonization of the brake drum; 8. Lack of brake fluid in the brake master cylinder; 9. Wear of the brake master cylinder piston.
Last time I drove my friend's automatic car, I encountered this situation: the car wouldn't move no matter how hard I pressed the accelerator while in D gear. The gear display was normal, but later I found out the brake switch was stuck, which is linked to the transmission protection. For manual transmissions, it could be a burnt clutch or a faulty release bearing—either way, don't force it to avoid damaging the clutch plates. Insufficient transmission fluid can also cause gear shifting issues; just pull out the dipstick to check. A dead battery can also cause electronic gear failure—try jump-starting it. If the electronic parking brake is stuck, it's even more troublesome; if you hear a buzzing sound from the rear wheels, stop immediately. I recommend turning the engine off and restarting three times. If that doesn’t work, call a tow truck right away—repairs will cost at least a thousand.
If the throttle doesn't respond, check the specific symptoms - whether the car jerks or completely loses power. For older cars with loose throttle cables, adjustment is needed. In electronic throttle cars, it's often a faulty throttle position sensor or worn-out throttle pedal resistor film. In automatic transmissions, loose shift cables may prevent gear engagement, while manual transmissions might have dirty gear oil. The most troublesome case I've encountered was a faulty ABS module affecting the transmission, which requires diagnostic computer scanning to identify. There's a fuse box under the steering wheel - check if relevant fuses are blown. Never force it on highways; remember to place warning triangles after stopping in the emergency lane. Safety comes first.
