What is the reason why the Nissan Qashqai suddenly fails to start but has power?

[Rita]

The reasons why the Nissan Qashqai suddenly fails to start but has power are as follows: The engine starts by the battery current pushing the spark plug to ignite. There may be two main reasons causing the engine to suddenly fail to start. First, it is very likely due to battery rust or leakage. Second, it could be caused by the engine spark plug getting damp on rainy days. Maintenance methods: Check the battery fluid level every one to two months to ensure it is sufficient. If the fluid level is between the upper and lower two marked lines, it is considered appropriate. Also, check the fluid level difference in each cell. If the fluid level is insufficient, unscrew the cap on the battery and add distilled water to replenish the fluid level. Additionally, inspect the battery terminals and use a wire brush to remove any accumulated dirt. If the terminal clamps are severely dirty, use sandpaper to scrape off the dirt along the inner wall. If the spark plug is damp, remove it and use a lighter to dry it to quickly evaporate the moisture on it.

[Holly]

I also drive a Qashqai. Last time, it suddenly had power but wouldn't start, which really worried me. Later, I found out that the main reasons could be a faulty starter motor or insufficient power. If the dashboard lights are on, it means the battery can still output a small current, but starting the engine requires a large current. If the battery is old or its performance drops in cold weather, it's more likely to fail. Another reason could be that the smart key battery is dead, and the anti-theft system won't unlock, preventing the car from starting. I remember trying the spare key, and that solved the problem. Also, check if any fuses are blown—the starter-related fuses are in the fuse box under the driver's seat. Pay extra attention to battery health as the weather gets colder. In short, I suggest first trying to replace the car key battery. If that doesn’t work, take it to a 4S shop to check the battery voltage and starting system. Don’t delay too long to avoid getting stranded on the road.

[AriannaRose]

Encountering the X-Trail having power but failing to start is quite common in my experience. The issue often lies in the starting system, such as a seized starter motor or a faulty ignition coil. The battery may appear charged on the surface, but insufficient voltage during startup prevents the engine from turning over. It could also be due to a depleted key fob battery, triggering the immobilizer and preventing ignition. A simple self-check method: first, check if any warning lights on the dashboard are abnormal, then test whether the headlights turn on—if they do but there's no response when starting, it's likely a starter motor issue. If you're hands-on, tapping the starter motor might temporarily get it working. However, I once found the problem to be a burnt-out fuel pump relay, which was fixed by replacing it myself. Regular maintenance should include testing the battery's lifespan—investing in a good-quality battery can save a lot of hassle. For serious issues, it's best to visit a professional shop as they have the tools for quick diagnosis.

[AnastasiaDella]

My Nissan Qashqai had this issue before—power on but unable to start. The reasons are usually limited to a few possibilities: starter motor failure is the most common, insufficient battery power causing unstable starts, or a faulty ignition switch or poor wiring contact. When checking, pop the hood and listen for sounds—if you hear a click but nothing happens, it's likely a motor issue. If it happens more frequently in winter, the battery is probably weakened. It's best not to tinker blindly—just drive it to the repair shop for professional diagnosis to save time. Older Qashqais tend to develop these minor issues, so fixing them early is the way to go.