What is the OBD fault in the engine?
2 Answers
Engine OBD indicates an emission exceedance situation and will issue an immediate warning. Introduction to OBD: OBD is the abbreviation for On-Board Diagnostic, translated in Chinese as "on-board diagnostic system." This system continuously monitors the engine's operating conditions and the working status of the exhaust after-treatment system. Once it detects a situation that may cause emission exceedance, it will issue an immediate warning. Principle of OBD: When a fault occurs in the system, the malfunction indicator lamp (MIL) or Check Engine warning light will illuminate. At the same time, the OBD system stores the fault information in the memory. Standard diagnostic tools and interfaces can read the relevant information in the form of fault codes. Based on the fault code prompts, maintenance personnel can quickly and accurately determine the nature and location of the fault.
As a novice car owner, I've encountered this situation: when someone says there's an OBD fault in the engine, they're actually referring to issues detected by the onboard diagnostic system. This OBD system is the vehicle's built-in diagnostic tool, constantly monitoring the engine's operating status; if it reports an error, the "check engine" light usually illuminates on the dashboard. Common faults include ignition coil problems, sensor abnormalities, or emission control failures, such as the P0300 code representing engine misfire. I recommend first purchasing a simple OBD scanner to connect to the port under the driver's seat and read the fault codes; then check the manual or search online for their meanings, which can save a lot of money. But don't delay addressing the issue, as it could lead to increased fuel consumption or engine damage. Pay attention to regular maintenance while driving, such as periodic checks of spark plugs and the fuel system, which can effectively prevent such problems. In short, as soon as the light comes on, scan to confirm immediately, and don't let small issues become big ones.
