What does it mean to check the engine management system?
2 Answers
Checking the engine system means inspecting the engine to determine if there is a fault in the emission system or an issue with the oxygen sensor. The vehicle owner needs to visit a 4S shop to read the fault codes and identify the specific cause. The detailed explanation is as follows: 1. The engine consists of three major parts and five service systems, which are the engine block assembly, the crankshaft and connecting rod mechanism, the valve train, the ignition system, the starting system, the lubrication system, the cooling system, and the fuel supply system. 2. The functions and basic components of each part are as follows: The engine block assembly supports the entire engine and also houses the crankcase, cylinders, etc.; The crankshaft and connecting rod mechanism converts the reciprocating motion of the piston into the rotational motion of the crankshaft, which is then output, including components like the connecting rod and crankshaft; The valve train supplies fuel and air to the cylinders and expels exhaust gases, composed of components such as tappets, valves, and control circuits.
The engine management system acts like the car's intelligent brain, monitoring the operating conditions of various critical components. When the system detects an abnormality in a certain part—such as incorrect readings from the oxygen sensor or issues with the spark plug ignition timing—it triggers the fault light as a warning. At this point, checking it means having the mechanic use a diagnostic computer to read the specific trouble codes and determine whether it's due to sensor aging, poor wiring contact, or actual problems like a clogged fuel injector. I always pay close attention to minor symptoms in my car, such as difficulty starting when cold or a sudden increase in fuel consumption, as these could be early signs of system issues. Last time, my car had poor acceleration, and after inspection, it turned out to be excessive carbon buildup in the throttle body—cleaning it restored smooth performance.
