Low Engine Compression
Faulty Fuel Injector
Fuel Injector harness is open or shorted
Fuel Injector circuit poor electrical connection
Faulty Engine Speed Sensor
Faulty Engine Control Module (ECM)
Engine Light ON (or Service Engine Soon Warning Light)
The Engine Speed Sensor detects RPM and reference marks. Without an engine speed signal, the engine will not start. If the engine speed signal fails while the engine is running, the engine will stall.