What Causes the Nissan Teana's One-Button Start to Fail to Detect the Key?

[LaBentley]

Here are the specific reasons and solutions for the Nissan Teana's one-button start failing to detect the key: 1. Battery depletion. For cars with batteries used for more than 2 years or parked for extended periods, check the battery voltage with a multimeter. Generally, the voltage should be around 12V when not in use and above 10V when starting, which can rule out battery issues. 2. Poor fuse contact. Gently tap the fuse box; if the car starts, it indicates poor fuse contact. 3. Starter motor failure. If the battery has power but no sound is heard from the starter motor when pressing the start button, it may be a starter motor issue, requiring replacement at a repair shop. 4. Ignition system failure. This includes faults in the ignition coil, spark plugs, or wiring. The S6 has two ignition coils and four spark plugs. The likelihood of both the ignition coil and spark plugs failing simultaneously is relatively high. Check the connections before and after the ignition coil to prevent loose connections and observe if the car can start. It is recommended to have this handled by professionals. 5. Fuel pump power failure. Unplug the fuel pump connector and measure the voltage or current when starting.