-Faulty Crankshaft Position Sensor: The crankshaft position sensor (CKP) monitors the engine's crankshaft rotation and provides this information to the engine control module (ECM). A faulty CKP sensor can prevent the ECM from receiving the necessary data to initiate the check engine light and manage engine functions properly, including starting.
-Defective PCM/ECM: The powertrain control module (PCM) or engine control module (ECM) is responsible for managing various engine systems and functions. If the PCM/ECM is defective or experiencing internal faults, it may fail to activate the check engine light and properly control the engine's starting process.
-Fuel Delivery Issues: If there are problems with the fuel delivery system, such as a faulty fuel pump, clogged fuel filter, or injector issues, the engine may not receive the necessary fuel to start, even though it has spark. In such cases, the check engine light might not illuminate due to the absence of engine-related sensor data.
-Immobiliser System Malfunction: Some Dodge Ram models are equipped with an immobiliser system that prevents unauthorised engine starting. If there's a problem with the immobiliser system, such as a faulty key or transponder, the check engine light may not come on, and the engine will not start.
-Wiring Issues: Damaged or loose wiring related to the check engine light circuit, CKP sensor, or PCM/ECM can prevent the light from illuminating when there are faults. Check for any broken wires, loose connectors, or corrosion affecting these components.
To accurately identify the root cause of the issue and resolve it effectively, it's recommended to have your vehicle diagnosed by a qualified mechanic or technician who can perform diagnostic testing, check for trouble codes, and verify the functionality of various components.
