Why can't the Hongqi HS5 one-button start work?

[SavannahDella]

Hongqi HS5 one-button start may not work due to a dead key fob battery, it is recommended to replace the battery. The following are the specific details of the Hongqi HS5: 1. Vehicle positioning: The Hongqi HS5 is a sedan. The wheelbase of the Hongqi HS5 is 2875 mm, and its length, width, and height are 4945 mm, 1845 mm, and 1470 mm respectively. 2. Power: This car is equipped with a 1.8-liter turbocharged engine across all models, with the engine code CA4GC18TD-11. The 1.8-liter turbocharged engine has a maximum power of 180 horsepower and a maximum torque of 250 Nm. This engine features direct fuel injection technology and uses an aluminum alloy cylinder head and a cast iron cylinder block. The engine is paired with a 6-speed automatic transmission from Aisin.

[OLane]

Having repaired cars for over a decade, I've encountered numerous cases of Hongqi HS5's one-button start failure. Depleted key fob battery is the most common issue—replacing the coin cell usually solves it. Signal interference is another headache, as nearby phones or metal objects can block the induction—it's best to keep the key fob isolated. The car absolutely won't start if not in Park (P), a must-check for automatic transmissions. Low battery voltage is particularly dangerous during cold winter starts when aging batteries struggle; dim dashboard lights are a telltale sign. Dirty or faulty button contacts may work after cleaning and multiple presses. Sometimes the anti-theft system falsely engages, requiring key removal and re-entry. Severe cases could indicate failed fuel pumps or ignition coils, requiring diagnostic trouble codes. Never force-start when one-button fails—methodically check simple causes before seeking professional help.

[SanJesse]

Last time when driving my friend's Hongqi HS5, the one-button start also failed. After inspection, it was found that the key battery was too weak, and it immediately worked again after replacing it with a new one. Interference sources can also be annoying - he used to throw his phone in the cup holder, causing signal confusion with the key. The gear must be set to P, otherwise the system will lock directly and not respond. Battery issues are more common in winter; insufficient voltage can paralyze the entire startup, especially after the car hasn't been moved for a long time. If the start button is stuck or worn out, try pressing it gently a few times. For safety, don't repeatedly attempt to start as it may damage components. I recommend testing the battery life during routine maintenance and replacing the key battery before it runs out. If you can't handle it, decisively seek a mechanic to save time and ensure peace of mind.

[KayleeAnn]

The failure of Hongqi HS5's one-button start may be attributed to electronic system malfunctions. Depleted key battery hinders signal transmission, while external interference such as radio equipment blocks communication. Poor contact inside the button or loose wiring harness could be the cause. If the gear is not set to P, the safety lock is activated. An aging 12V battery with unstable output fails to supply power to the starting unit. The anti-theft controller may falsely trigger and interrupt ignition. Simple diagnostic steps: Ensure the key is within the vehicle's range, try using a spare key; confirm the P gear setting; test the battery voltage exceeds 12V; if no response, inspect relevant module cables. Regular maintenance can prevent such issues, which are more common in older vehicles.