- Sticking ignition switch: The ignition switch is responsible for supplying power to the engine and other electrical components. If it is faulty or worn out, it may cause the engine to stay running even after the key is turned off.
- Problem with the fuel shut-off solenoid: The fuel shut-off solenoid is a device that stops the flow of fuel to the engine when the key is turned off. If it is faulty, it may not fully close and continue to provide fuel to the engine.
- Issues with the ECM: The ECM is the truck's engine control module, which controls various functions including starting and stopping the engine. If the ECM is faulty, it may cause the engine to remain running even after the key is turned off.
- Faulty wiring or short circuit: A short circuit or fault in the wiring harness could be causing power to be supplied to the engine even when the key is turned off, making it continue to run.
It's recommended that you seek assistance from a qualified mechanic or Isuzu dealership for proper diagnostics and repairs.
