An ECU (Engine Control Unit) is your vehicle’s main computer that controls how the engine operates. It constantly monitors information from various sensors around the car — such as air intake, fuel levels, temperature, and exhaust emissions — and adjusts settings in real time to ensure the engine runs efficiently and safely. The ECU manages key functions including fuel injection, ignition timing, and emissions control, helping to optimise performance, improve fuel economy, and reduce harmful emissions. If a fault is detected, the ECU will often trigger a warning light on your dashboard, indicating that a diagnostic check may be needed.
