Reasons for the Haval H2s Failing to Start Due to Auto Hold Malfunction
3 Answers
Auto hold malfunction preventing startup is caused by the auto hold button being stuck or a damaged ABS pump. Below are detailed explanations: Auto hold button stuck: The auto hold button is stuck, preventing the auto hold function from being deactivated. 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 hold the electronic parking brake down for 5 seconds and pull it up for another 5 seconds to initialize and reset the electronic parking brake. ABS pump damage: A damaged ABS pump prevents the car from starting. Solution: Replace the ABS pump with a new one.
Over the past few years, I've driven many cars and encountered situations where the auto-hold malfunction prevented the engine from starting more than once. In the Haval H2s, it could be because the battery was drained by the repeated operation of the auto-hold system—the system was still running when parked, leading to insufficient power for ignition. It could also be due to a faulty sensor mistakenly thinking the car was still moving, thus safety-locking to prevent startup. Or, the Electronic Control Unit (ECU) might be malfunctioning, with a software glitch blocking the ignition signal transmission. My suggestion is to first check the battery: see if the headlights turn on and if the dashboard responds; if the battery is weak, charge it or replace it. If you don't have tools, try disconnecting the battery cables to reset the computer. For prevention, turn off all electronic devices after parking and ensure the auto-hold button is reset to minimize such issues. Also, don’t neglect regular checks on wiring harness connections to prevent loosening. Overall, it's a minor issue, but it needs timely attention.
I've encountered this issue with the Haval H2s several times while helping others with car repairs. The auto-hold failure prevents the car from starting, possibly due to a logic error in the parking module, such as the system mistakenly locking the ignition when it misjudges the engine is still running. Another common cause is an aging battery or loose connections, where the system drains too much power in standby mode. It could also be a blown fuse or relay failure interrupting the circuit. For DIY solutions, check the fuse box—replace any related fuses; inspect the battery terminals for corrosion. Professionally, it's best to use a diagnostic tool to read the fault codes and determine whether a sensor is faulty or the ECU needs an update. During routine maintenance, clean engine compartment dust and ensure wiring stays dry. Safety reminder: When the issue occurs, avoid forcing a start—call for a tow truck first; minor faults can often be prevented.
