Is the OBD Fault Light Serious?

[StDelilah]

obd fault light indicates excessive exhaust emissions but does not affect engine power. The OBD system continuously monitors whether the vehicle's exhaust exceeds standards during engine operation and issues an immediate warning if levels are exceeded. When a system malfunction occurs, the fault light or check engine warning light illuminates, while the powertrain control module stores the fault information in memory. The trouble code can be read from the PCM through specific procedures. Based on the trouble code prompts, maintenance personnel can quickly and accurately determine the nature and location of the fault. More details are as follows: 1. Repair OBD system faults promptly. Annual vehicle inspections have limited effectiveness in controlling automotive emissions. However, with OBD installed, the situation is completely different as it allows continuous monitoring of the vehicle's emission levels. 2. If emissions fail to meet standards, the OBD will issue a warning to promptly notify the driver to seek repairs. The most critical aspect of Euro III standards is the use of OBD.