What are the reasons for the engine malfunction indicator light turning yellow?
1 Answers
The engine malfunction indicator light comes in two colors: yellow and red. Yellow indicates a warning, while red signifies a prohibition. When the yellow malfunction light is on, it means that certain system parameters in the vehicle may have exceeded the set range. The vehicle can still be driven, but some functions may be limited. When the red malfunction light is on, the vehicle must be stopped immediately, the engine should be turned off, and driving should not continue. The issue must be checked immediately. Common reasons for the engine malfunction light to turn on include: sensor failure, oil quality issues, poor combustion of the air-fuel mixture, turbocharging problems, intake issues, exhaust problems, or anti-theft system malfunctions. If the engine malfunction light turns on, follow these steps: First, check if the engine is running normally. Look for signs such as shaking, black smoke, or difficulty starting. If any of these issues are present, avoid restarting the engine. Note: If the red light is on, do not restart the engine under any circumstances. If the engine is running normally and the vehicle can be driven, proceed to a service station as soon as possible to diagnose the issue. Service stations can easily read the fault codes using a portable diagnostic tool to identify and fix the problem. If the engine is running normally, the owner can also try gently reconnecting various wiring harness connectors, as a loose connection might be the cause. Alternatively, repeatedly turning the key to the ON position may help reset the light.
