What is the reason for the Isuzu SVS light being on?
2 Answers
Isuzu SVS light is similar to the engine fault light. When the SVS indicator light is on, it indicates that the engine control unit has detected an error signal from a certain sensor or that the sensor has exceeded the usage standard. When the ignition switch is turned on, the car's SVS indicator light will illuminate for an automatic check and will automatically turn off after a few seconds. If the car's SVS light flashes and then stays on, it means the car needs an oil change and maintenance, and then the SVS fault light can be cleared with a diagnostic reset. The reason is that the vehicle is equipped with a DPF, which requires periodic regeneration. Excessive regeneration can lead to oil dilution, so to prevent excessive oil dilution, the SVS light flashes and then stays on as a reminder. When the SVS light stays on, it is accompanied by engine torque limitation, which will gradually increase, with the maximum torque limitation reaching 50%. At this point, the power will be significantly affected. Every vehicle has an engine fault indicator light, and some models are additionally equipped with an SVS indicator light, which serves the same purpose as the engine fault indicator light. When the SVS (engine fault light) stays on, it indicates that there is a fault in the engine. If it only lights up for a few seconds during startup and then turns off, it is normal. Solution: First, check if other equipment in the car shows any abnormalities, such as the water temperature gauge or oil pressure warning light. If only the SVS light is on and the engine can still be started, drive cautiously, control the speed, and promptly go to a repair shop for inspection. If accompanied by signs such as increased combustion chamber temperature or oil pressure warning light, continuing to drive may lead to aggravated engine wear and early engine damage.
I've been in the automotive repair industry for many years. The most common reason for the SVS light to come on is the need for an oil change, as Isuzu's maintenance reminder system is quite sensitive—it alerts you as soon as you exceed the mileage or time limit. However, it could also be due to an issue with the engine sensors, such as an oxygen sensor or exhaust system malfunction, which can lead to emissions not meeting standards. Occasionally, it's related to aging electrical wiring, and unstable battery voltage can also trigger it. To be honest, although this light seems minor, ignoring it could affect your vehicle's performance, increase fuel consumption, and even compromise safety. It's best to head to a 4S shop or a professional repair shop immediately to read the fault codes with a diagnostic tool, and avoid long-distance driving in the meantime. Regular maintenance, such as checking the oil every 5,000 kilometers, can help prevent this issue.
