* Fuel Pump Issues: The most likely culprit is a problem with the fuel pump itself or its associated circuitry. The fuel cut-off might be a safety feature triggered because the pump isn't delivering fuel. This could be due to a faulty pump, a blown fuse or relay related to the pump, a clogged fuel filter, low fuel pressure, or a problem in the fuel pump wiring.
* Immobilizer System: Some vehicles have immobilizer systems that prevent the engine from starting unless the correct key is used. If you're using a spare key or a recently reprogrammed key, there could be an issue with this system.
* Other Electrical Problems: A broader electrical problem could also trigger the fuel cut-off light. This could involve a faulty alternator, a dead battery (though unlikely if the lights are on), or a problem in the car's computer system (ECM/PCM).
* Security System Malfunction: A faulty alarm system or aftermarket security device could be interfering with the starting process and triggering the fuel cut-off as a safety measure.
What to do:
1. Safety First: Do not repeatedly try to start the car. This could drain the battery and potentially damage the starter motor.
2. Check the Obvious:
* Fuel Level: Ensure you have enough fuel in the tank. A low fuel level can sometimes trigger the fuel cut-off light.
* Fuses and Relays: Check the owner's manual to locate the fuses and relays related to the fuel pump and ignition system. Inspect them for damage.
* Battery: Test the battery voltage using a multimeter to ensure it has sufficient charge.
3. Professional Help: Given that the fuel cut-off light remains on despite trying the override switch, this is beyond simple DIY troubleshooting. You need a qualified mechanic to diagnose and repair the problem. Attempting further fixes yourself could lead to more extensive and costly repairs. Towing the vehicle to a mechanic or dealership is recommended.
Do not attempt to bypass the fuel cut-off system permanently. This is a safety feature and disabling it could be dangerous.
