The Jeep Wrangler Engine Control Module (ECM) is the vehicle’s brain, responsible for managing and regulating critical engine functions. It monitors sensors, adjusts fuel injection, and controls the ignition timing to ensure optimal performance, fuel efficiency, and emissions. A malfunctioning ECM can lead to poor engine performance, stalling, or starting issues. Understanding the ECM’s role in diagnostics and its importance in maintaining the Wrangler’s performance is key to ensuring the longevity and reliability of the vehicle.