Possible Causes:
1. Brake Switch: The brake switch is responsible for sending a signal to the car's computer that the brake pedal is being depressed. If the brake switch is faulty, it may not be sending this signal, which can cause the car to cut off when the brakes are applied.
2. Transmission Range Sensor: The transmission range sensor is responsible for detecting what gear the transmission is in. If the transmission range sensor is faulty, it may not be providing the correct information to the car's computer, which can cause the car to cut off when the brakes are applied.
3. Fuel System Issue: A fuel system issue, such as a clogged fuel filter or faulty fuel pump, can also cause the car to cut off when the brakes are applied.
4. Vacuum Leak: A vacuum leak can cause the car to run lean, which can lead to stalling.
Solution:
To resolve this issue, you will need to identify the root cause of the problem and make the necessary repairs. Here are some steps to help you troubleshoot the problem:
1. Check the brake switch. If the brake switch is not functioning properly, it will need to be replaced.
2. Check the transmission range sensor. If the transmission range sensor is not functioning properly, it will need to be replaced.
3. Check the fuel system. Inspect the fuel filter for clogs and check the fuel pump for proper operation.
4. Check for vacuum leaks. Look for any disconnected or cracked vacuum hoses.
If you are unable to identify and resolve the problem on your own, you may need to take your car to a qualified mechanic for further diagnosis and repair.