What does the SVS light mean and how to deal with it?
2 Answers
SVS light on indicates an engine malfunction. The handling method is: try to start the engine. If it cannot be started, it may be due to abnormal fuel pump. If it can still be started, it may be other sensor failure, and the corresponding sensor can be replaced. The following is the relevant content introduction: The car SVS light on is an engine fault, indicating that the engine control unit has detected an error signal from a certain sensor. The reasons for the SVS light to come on are: 1. Poor mixture combustion: engine spark plug failure, ignition coil failure, fuel pump failure, fuel line blockage, etc. will cause poor engine mixture combustion. 2. Sensor problems: including water temperature, crankshaft position, oxygen sensor, etc. When these sensors are damaged, the car's ECU cannot accurately obtain engine data, causing the engine fault light to come on.
The SVS light indicates that your vehicle needs servicing as soon as possible, as it may signal abnormal issues detected by the engine management system, emission system, or other components. Having driven for many years, I've encountered this light several times, and each time, I immediately find a safe place to pull over to check for unusual noises, odors, or whether other dashboard lights, such as the engine light, are also illuminated. If there are no obvious problems, I try using an OBDII scanner to read the specific error codes—nowadays, a smartphone app with an accessory can do the job, making it easy to identify the cause. Common causes include a faulty oxygen sensor, low oil pressure, or a malfunctioning mass airflow sensor. If the light stays on steadily, you may still drive at low speed to a repair shop; but if it flashes, you should call for a tow truck, as it indicates a more urgent issue like a cylinder misfire. In summary, don’t delay addressing it, as minor problems can escalate into major repairs, costing you unnecessary expenses. Regular maintenance, such as changing the oil and filters, helps prevent such issues.
