Why does the car's stop light come on and then go off?
2 Answers
When starting the car, the stop light may come on briefly due to low temperatures and then turn off. Here is some relevant information about the stop light: 1. Concept: The STOP light is a mandatory parking warning light, which should illuminate simultaneously with other warning lights such as low oil pressure, low brake fluid level, or high coolant temperature, indicating that the engine must be stopped. 2. Classification: The dashboard also includes indicators for coolant temperature, oil pressure, air pressure, engine, and cab. If any component malfunctions, the STOP light will illuminate. For example, if the engine coolant temperature is too high while driving, the coolant warning light will come on, and the STOP light will also illuminate to indicate an engine fault. There is also a yellow light on the dashboard, while the STOP light is red. A yellow light indicates a general fault, and a red light indicates a serious fault.
This situation is common for me. When the car's STOP light comes on and then goes off, it's usually a momentary fault signal. Common causes include false alarms from the oil pressure sensor—the light may flicker during startup due to unstable oil pressure; or insufficient oil level triggering the light when it drops slightly; loose circuit connections or oxidized relay contacts can also cause intermittent warnings. Even if the light goes off, it should not be ignored, as it could be a precursor to engine overheating or serious issues. Last year, my car had the same issue, and upon inspection, it turned out to be a minor coolant hose leak causing temperature fluctuations. It's advisable to stop immediately and check if the fluids are up to standard, then use an OBD diagnostic tool to scan for error codes and pinpoint the problem. During regular maintenance, always inspect wiring and sensors to prevent minor issues from escalating into major repairs, extending your car's lifespan and saving you hassle.
