What causes the SVS warning light in diesel vehicles?

1 Answers
CoreyMarie
07/29/25 9:08am
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.
Was this review help?
5
3
Share
More Forum Discussions

Which engine oil should be used for the Fit?

The Fit can use 0w20 or 5w20 engine oil. If your driving habits are more aggressive, you can use 0w30 or 5w30 engine oil. Here is more information about engine oil: 1. There are three types of engine oil: full synthetic oil, semi-synthetic oil, and mineral oil. 2. The base oil of full synthetic oil is artificially synthesized. The molecules of this oil are almost identical in size and shape, so it offers better lubrication performance and a longer service life. 3. The base oil of mineral oil is refined from petroleum. The molecules of this oil are irregular in size and shape, so mineral oil generally has average lubrication performance and a shorter service life.
6
4
Share

Should D- or D+ be used when going downhill?

D gear is generally used for city driving, D+ is used when climbing a slope and more power is needed, while D- is used when going down a gentle slope. The choice between D gear and S gear depends on the steepness of the slope. For less steep slopes, D gear can be used, but for steeper slopes, D gear may not provide enough power, and S gear should be used instead. Lower gears provide greater torque, making it easier to climb slopes. However, when going down steep slopes, it is essential to develop the habit of using S gear, which is beneficial for the car and ensures driving safety. Below is an introduction to D gear and S gear: 1. D gear stands for Drive gear, which is present in all automatic transmission vehicles. When D gear is engaged, the vehicle's computer will shift gears according to preset programs. + is for manual mode upshifting, and - is for manual mode downshifting. 2. D (+, -): Manual mode. Allows manual shifting; pushing up shifts up one gear, and pulling down shifts down one gear. It is possible to start in 2nd gear. 3. S gear consumes more fuel. S gear is a high-rev gear that upshifts late and downshifts early, providing better vehicle performance, making it suitable for climbing steep slopes or overtaking. Switching between S and D gears can generally be done at any time, but it is recommended not to shift from D to S when the vehicle speed and engine RPM are high.
1
0
Share

What is Volkswagen 4motion?

4motion is Volkswagen's full-time four-wheel drive system, representing the brand's advanced technological expertise. This system can freely distribute power based on driving conditions, even concentrating all driving force on a single wheel when necessary. Here is more information about Volkswagen 4motion: 1. 4MOTION is to Volkswagen what quattro is to Audi—it's merely a registered trademark and can no longer specifically denote a particular mechanical structure. 2. In 1986, Volkswagen first equipped the 'syncro' four-wheel drive system on the GOLF model, which is the predecessor of today's 4Motion. At that time, it used a silicone viscous coupling as the limited-slip transmission device. 3. The Golf syncro launched in 1986 was the first mass-produced Volkswagen vehicle to feature the 4MOTION four-wheel drive system. Since then, Volkswagen's four-wheel-drive family has continued to expand.
13
3
Share

How to determine if your ETC is functioning normally?

Here are the methods to determine if the ETC is functioning normally: 1. For a newly received ETC electronic tag (OBU device), when pressing the anti-tamper switch on the back, a red light will briefly illuminate, and the electronic tag screen will display messages such as 'Tag Invalid' or 'Please Insert Card,' indicating that the device is normal and does not affect activation. 2. For an ETC device that has been successfully activated, when inserting the ETC card, the corresponding vehicle information or account balance will be displayed, indicating that the ETC device is functioning normally. 3. If the screen does not display anything after inserting the card, or the ETC light does not turn on and remains blank while the ETC device is powered on, the device may be out of power or damaged. In this case, the device should be taken to an ETC service outlet or highway service office for testing and reactivation. 4. If the ETC electronic tag is invalid due to human damage or the ETC device falling off, the card cannot be used normally no matter how it is inserted, and the account balance will not be displayed. The solution is to take the device to an ETC service outlet for secondary activation.
20
1
Share

Which region does the license plate 'Hei L' belong to?

Hei L was the license plate prefix for the Songhuajiang region before its merger with Harbin City. In May 2014, the State Council approved adjustments to some of the administrative divisions in Harbin City, which included the abolition of the county-level Shuangcheng City and the establishment of Shuangcheng District. Here is more information about vehicle license plate numbers: 1. The first Chinese character of a license plate number represents the province where the vehicle is registered at the vehicle management office. The second letter is allocated based on the ranking of the city where the vehicle management office is located within the province. 2. In some large cities, the following five digits may consist of the first two letters followed by three numbers. 3. The first one or two digits indicate the sequence of license plate issuance. Generally, 2-4 letters are released at a time, and the following numbers are a code, not strictly in order, allowing for number selection.
9
4
Share

What kind of engine oil is suitable for BAIC Senova D50?

The BAIC Senova D50 equipped with a 1.5L naturally aspirated engine uses 30-viscosity full synthetic engine oil, while the model with a 1.5L turbocharged engine uses 40-viscosity full synthetic engine oil. When purchasing engine oil, it is recommended to choose full synthetic oil. This type of oil has artificially synthesized base oil with nearly identical molecular sizes and shapes, offering superior lubrication performance and a longer service life. The front fascia of the Senova D50 continues the Senova family's design style, featuring a shield-shaped air intake grille paired with propeller-wing-inspired decorative strips, inheriting SAAB's aviation heritage. The distinctive "North"-shaped characteristic lines on the front bumper, along with the rounded diamond-design headlights and polygonal fog lights, form the overall "North" character styling.
13
1
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.