What is the reason for the auto-hold failure preventing the car from starting?
2 Answers
The reason why the auto-hold failure prevents the car from starting is that the auto-hold button is stuck or the ABS pump is damaged. The following are detailed explanations: Auto-hold button stuck: The auto-hold button is stuck, causing the auto-hold function to fail to release. Solution: Check for any foreign objects. If none are found, reset the electronic parking brake. Turn on the car key, press the foot brake, then press the electronic parking brake down for 5 seconds and pull it up for another 5 seconds. This will initialize and reset the electronic parking brake. ABS pump damage: Damage to the ABS pump prevents the car from starting. Solution: Replace the ABS pump with a new one.
Failure of the auto-hold function causing the car to fail to start is quite common. I've noticed this while studying cars. It's usually because the electronic parking system is stuck in a locked state, and the vehicle control unit detects an abnormal parking condition, preventing the engine from starting to avoid accidents. Common issues include solenoid valve sticking, sensor false alarms, or ECU communication failures affecting power distribution. For example, when the battery is low, the parking module might mistakenly judge it as locked. The first response should be to check the dashboard warning lights flashing and ensure the brake pedal is fully released. Before starting the engine, try pressing the parking button again to listen for any sound changes. Regular maintenance should focus on the electronic system connections, cleaning dust to prevent short circuits. If you encounter a problem, don't force-start the car; use a diagnostic tool to read the error codes before proceeding to avoid damaging more components.
