What Causes the Engine Malfunction Indicator Light to Stay On in a Car?

1 Answers
LaLila
07/29/25 5:02pm
Reasons why the engine malfunction indicator light stays on in a car: 1. Sensor issues; 2. Poor engine combustion state; 3. Poor fuel quality; 4. Poor engine combustion state. Hazards of the engine malfunction indicator light being on: 1. Deterioration of vehicle exhaust emissions, polluting the environment; 2. Increased fuel consumption; 3. Rising combustion chamber temperature, accelerated wear, leading to engine damage; 4. Increased engine noise affecting driving. Solutions for the engine malfunction indicator light being on: 1. Clean the engine with a cleaning agent; 2. Use higher-grade gasoline; 3. Improve fuel quality.
Was this review help?
19
5
Share
More Forum Discussions

What engine does the Fengon ix5 have?

Fengon ix5 offers two turbocharged direct-injection engines. The 1.5T engine delivers a maximum power of 179 horsepower and a maximum torque of 270 N·m, while the 2.0T engine provides a maximum power of 231 horsepower and a maximum torque of 355 N·m. Introduction to Fengon ix5: 1. Exterior design: It adopts the family-style progressive front grille design, with three upward-slanting chrome strips firmly supporting the double-swallow logo. The sharp headlights are integrated with the air intake grille, and the Dongfeng Fengon iX5's leopard-like diving front face design gives the front part a strong visual impact. 2. Configuration: It uses the Baidu Apollo system, which will be equipped with active safety features such as forward collision warning and lane departure warning system. 3. Interior: It features a full LCD instrument panel paired with a large central control LCD screen, and the three-spoke steering wheel has the brand logo at the 6 o'clock position.
7
2
Share

What are the steps for changing engine oil and oil filter?

1. Remove the drain plug to drain the engine oil. 2. After draining, clean the drain plug and reinstall it. Tighten it to the specified torque: 30N·m 3. Loosen the oil filter using an oil filter wrench. 4. Apply engine oil to the O-ring of the new oil filter. 5. Hand-tighten the new oil filter onto the filter bracket until the O-ring contacts the mounting surface. Then, use the oil filter wrench to tighten it further. Pay attention to the exact position where the O-ring initially contacts the mounting surface for proper tightening. 6. After contact with the mounting surface, tighten the filter an additional 3/4 turn using the oil filter wrench. Tightening torque: 15N·m. For safe operation, note the following when changing the engine oil filter: Park the car on a level surface, as an inclined surface may prevent complete drainage of old oil. It's best to change the engine oil filter before driving. If the engine has been running, wait at least 30 minutes after shutdown to allow the oil to fully return to the oil pan.
13
5
Share

Can a Car That Uses 92 Octane Fuel Use 95 Octane?

A car that uses 92 octane gasoline can use 95 octane gasoline, but it is not recommended for long-term use. Long-term mixing of different octane fuels will affect the service life of the car's ignition system, fuel injectors, and spark plugs, leading to earlier major repairs. The choice of fuel octane can be determined based on the engine's compression ratio. Cars with an engine compression ratio between 8.6-9.9 should use 92 octane gasoline, those between 10.0-11.5 should use 95 octane gasoline, and those with higher compression ratios should use 98 octane gasoline. However, with the use of some new technologies, the compression ratio alone cannot determine the appropriate fuel octane. High compression ratio engines can also be tuned to use lower octane gasoline because, besides the compression ratio, other factors such as ignition timing, turbocharging technology, and Atkinson cycle technology also play a role. Generally, the higher the fuel octane, the higher the octane number and the better the anti-knock performance. 92 octane gasoline contains 92% isooctane and 8% n-heptane, while 95 octane gasoline contains 95% isooctane and 5% n-heptane. Occasionally using the wrong fuel octane is not a problem as long as you switch back to the correct octane after using it up. However, long-term use of the wrong fuel octane can have the following effects: For vehicles designed for lower octane fuel, using higher octane fuel will not cause damage, but the increase in octane number will change the fuel's ignition point, leading to delayed combustion in the engine. This reduces the engine's power output and thermal efficiency, resulting in poorer performance. For vehicles designed for higher octane fuel, using lower octane fuel can cause engine knocking. Because the octane number is too low, the fuel's ignition point decreases, causing premature ignition during the compression stroke. If the fuel ignites before the spark plug fires, resistance will occur during the upward stroke. This resistance makes the engine run very unstable. If the knocking is mild, it only increases noise without significant damage to the engine. However, if the knocking is severe, it indicates serious engine conditions, affecting not only driving stability but also causing abnormal wear on pistons and cylinders, and in severe cases, cylinder scoring. Precautions for choosing gasoline: Select gasoline with appropriate volatility based on the car's operating environment temperature. Gasoline with good volatility makes cold starts easier and allows the engine to warm up smoothly. However, if the volatility is too high, it can easily cause vapor lock in the fuel lines, preventing the fuel pump from pumping fuel properly and causing the engine to stall. Choose gasoline based on its lead content.
5
5
Share

What to Do If Driving License Is Lost?

If your driving license is lost, there is no need to report the loss. You just need to apply for a replacement at the vehicle management office in time. However, when applying for a replacement, you need to fill out a written statement of loss for the motor vehicle driving license to prove that the license has indeed been lost and to declare that you will not be responsible for any improper consequences caused by the lost license. More details are as follows: 1. You cannot drive if your driving license is lost. According to Article 28 of the "Regulations for the Implementation of the Road Traffic Safety Law of the People's Republic of China", motor vehicle drivers are not allowed to drive if their driving license is lost, damaged, expired, confiscated, suspended, or if they have accumulated 12 penalty points. 2. The methods for replacing a driving license are as follows: (1) The first method is to personally go to the vehicle management office for replacement. You need to bring your original ID card and a copy of it. Non-local residents also need to bring their original residence permit and a copy to the nearest vehicle management office. At the office, fill out the "Motor Vehicle License and Permit Application Form", then submit the documents and the completed form to the office staff and pay the service fee. (2) The second method is to authorize someone else to handle it for you. In this case, you need to fill out the "Motor Vehicle Business Power of Attorney", provide the original organization code certificate of the unit, the original unit authorization letter, the original second-generation ID card of the authorized person, and go to the corresponding window of the vehicle management office (or traffic police brigade) with the unit's contact number and the authorized person's mobile phone number.
18
3
Share

What are the dimensions of the Jetta VS7?

The body dimensions of the Jetta VS7 are: length 4624 mm, width 1841 mm, height 1644 mm, and the wheelbase is 2730 mm. Introduction to the Jetta VS7: 1. Configuration: It features a turbocharged intake system, front-wheel drive, electric power steering, and a fuel tank capacity of 51L. 2. Powertrain: It is equipped with a 1.4T turbocharged engine, delivering a maximum power of 110 kW, utilizing direct injection technology, with a maximum power speed range of 5000 to 6000 RPM, and a maximum torque speed range of 1750 to 3000 RPM.
1
1
Share

How to Repair Car Paint?

The methods for repairing car paint are as follows: 1. Minor Scratches. They can be completely repaired by waxing. Apply the compound in straight lines, then apply wax. You can start with coarse wax, followed by fine wax, moving from the inside out in the same direction to remove minor scratches. 2. Scratches Without Primer Damage. For slightly larger scratches, a touch-up pen can be used as a remedy. Before use, shake the paint inside the touch-up pen thoroughly. You can add a certain amount of thinner to the touch-up pen to ensure smooth application. Carefully spray the area that needs repair, and after the touch-up paint has dried, apply fine wax.
14
3
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.