Why does the Nissan Sylphy have power but won't start?

[RyderFitz]

The reasons why the Nissan Sylphy has power but won't start are as follows: 1. Insufficient fuel: When the car lacks its power source "gasoline", it naturally won't start. If the failure to start is caused by running out of fuel, this situation can be easily resolved. Depending on your circumstances, you can seek help from nearby car owners, request to borrow fuel, or arrange for towing to a gas station as emergency measures. 2. Incorrect gear position: An incorrect gear position can also prevent the car from starting. Generally, the correct gear positions for starting are P (Park) or N (Neutral). Sometimes, due to carelessness when parking, the gear might be left in another position, naturally causing the car not to start. Moreover, an incorrect gear position can also pose safety hazards. 3. Circuit malfunctions: This includes blown fuses, open circuits in the high-voltage coil, open circuits in the low-voltage circuit, detachment of the central ignition wire, leakage in the distributor head, or damaged spark plugs. 4. Electronic failures: Mainly referring to the central computer control board losing functionality. 5. Fuel system issues: Malfunctions such as a failing fuel pump, blocked fuel lines, clogged fuel filters, carbon buildup on spark plugs, or damaged fuel injectors.

[MacLukas]

My Sylphy also had a similar issue before - the dashboard lights were on when powered but it wouldn't start. After struggling for a while, I found out the battery was nearly dead. It could power the lights but couldn't provide enough current to start the engine. Another common cause is a faulty starter motor, either due to aging of the motor itself or loose/rusted battery connections. Sometimes it could be the car's anti-theft system locking up, possibly because the key fob battery is dead or there's signal interference. I suggest you immediately try jump-starting or directly call a tow truck to take it to a repair shop for inspection. Don't force it yourself to avoid damaging the wiring.

[LaCalvin]

I once had an issue with my old Nissan Sylphy during winter where it had power but wouldn't start, almost making me late for work. The diagnosis revealed an ignition system failure—either the spark plugs were too carbon-fouled and needed replacement, or the ignition coil was damaged causing the no-start condition. Another possibility is a faulty fuel pump; an empty fuel tank or clogged fuel filter could also lead to this. You can listen for the starter motor sound during ignition attempt to help diagnose. The safest approach is to directly call the dealership for on-site diagnostics. Experience tells me not to repeatedly attempt starting, as this can cause additional engine damage.

[StMadeline]

The issue of the Sylphy not starting when powered on is quite common. First, check the simpler possibilities, such as loose battery connections or a dead key fob battery triggering the anti-theft system to prevent startup. Then, try stepping on the brake and turning the key to listen for sounds. If the starter motor doesn't turn, it might be a blown fuse. If these steps don't work, seek professional help immediately to avoid wasting time and risking safety.