What is the reason for the SVS light being on but the car can still drive normally?
2 Answers
SVS light being on indicates that the engine control unit has detected an error signal from a certain sensor, or it has exceeded the usage standard. Here is the relevant information about the SVS indicator light: Introduction to the SVS indicator light: The SVS fault indicator light is a warning light that appears when the ECU or TCU of an electronically controlled fuel injection vehicle detects a problem with the engine or automatic transmission. For manual transmission vehicles, it is the engine fault indicator light, while for automatic transmission vehicles, it indicates both engine and automatic transmission faults. When the ignition key is turned on, this light will illuminate and should go off after the vehicle starts. If the engine detects a fault, the SVS light will stay on. If this light comes on while driving, it means there is a fault with the vehicle's engine. Reasons for the SVS indicator light being on: Poor combustion state; Poor fuel quality; Dirty engine cylinders with carbon deposits.
I've encountered situations where the SVS light came on while driving, but the car was still running normally. It's actually quite common. This warning light usually just indicates that the onboard computer has detected a minor issue, but it's not serious enough to affect engine operation. Possible causes include sensor malfunctions, such as faulty oxygen or temperature sensors, or slightly reduced efficiency in the emission system's catalytic converter. The car continues to run normally because the problem isn't severe, electrical transmission remains uninterrupted, and the engine can still function. However, based on experience, don't take it lightly. Long-term neglect can lead to decreased fuel efficiency, and excessive emissions can cause more damage to the vehicle. I recommend checking the fuse box the next time you refuel. If it's a simple fix you can handle yourself, replace it; otherwise, promptly schedule an appointment with a professional shop to use diagnostic tools for inspection—it's both cost-effective and reassuring. Pay more attention to regular maintenance, such as performing a check every 5,000 kilometers, to prevent problems before they occur and make your car more durable.
