What causes the SVS warning light in diesel vehicles?
1 Answers
Diesel vehicle SVS warning light is triggered by engine malfunctions. The causes include: 1. Fuel emission system failure; 2. Intake tract malfunction; 3. Spark plug carbon buildup; 4. Sensor failure; 5. Poor fuel quality; 6. Engine carbon deposits; 7. Three-way catalytic converter failure; 8. Engine knocking. Solutions for SVS light illumination: 1. Check oxygen sensor connector for looseness; 2. Clean spark plugs; 3. Replace oxygen sensor; 4. Replace three-way catalytic converter; 5. Clean engine; 6. Drain old gasoline from tank and refill with premium fuel. SVS operational principle: The light activates when ignition is turned on and extinguishes after engine start. If ECU detects faults during operation, the SVS light illuminates, indicating engine malfunction.