Q

why my car engine light is on

When your car's check engine light comes on, it usually means the vehicle's electronic control system has detected an issue. This could be caused by something as simple as a faulty oxygen sensor, worn spark plugs, a problematic ignition coil, abnormalities in the fuel system, issues with the exhaust system, or even a loose gas cap. It's advisable to use an OBD - II scanner to read the trouble codes as soon as possible to pinpoint the exact problem, ignoring it for too long might lead to more serious damage down the line. Here in Malaysia, the hot and humid weather can speed up circuit aging or cause sensors to get damp, so regular circuit checks and keeping the engine bay clean are especially important. If the check engine light starts flashing or is accompanied by noticeable abnormalities like loss of power or strange noises, stop the vehicle immediately and contact a repair shop. This could indicate serious issues such as engine knocking or a damaged catalytic converter. During regular maintenance, make sure to use engine oil and fuel that meet the manufacturer's specifications, and replace the air filter regularly. These simple measures can effectively lower the likelihood of the check engine light being triggered. For newer models, the engine light might also be related to the emissions system; if left unresolved, it could cause you to fail your vehicle inspection, so prompt repairs are essential.
Special Disclaimer: This content is published by users and does not represent the views or position of PCauto.
  • Popular Cars

  • Model Year

  • Car Compare

  • Car Photo

Latest Q&A

Q
Is V6 the number of cylinders?
Yes, V6 means the engine adopts a V-type six-cylinder design, where its six cylinders are divided into two banks with three cylinders each. The two banks of cylinders are usually arranged at an angle of 60 degrees or 90 degrees. This structure ensures power output while achieving a compact layout and low vibration characteristics. V6 engines, with their smooth operation performance and high power output, are commonly used in mid-to-high-end sedans and performance models. For example, the locally popular Toyota Camry 3.5L and Nissan Teana 3.5L both use such engines. Compared with inline-four engines, V6 engines are more relaxed in acceleration response and high-speed cruising, but their maintenance costs are relatively higher, and attention should be paid to regular replacement of timing belts and special oil. Currently, some brands such as Lexus continue to optimize V6 technology in new models, further improving fuel efficiency through direct fuel injection and turbocharging.
Q
Does a V24 engine exist?
The V24 engine does exist. It is a piston engine composed of 24 cylinders arranged in a V configuration, typically used in specialized fields such as large industrial equipment or high-performance racing cars. The most famous historical example is the AS.6 engine developed by Fiat in the 1930s for the Macchi-Castoldi M.C.72 racing aircraft. It was actually formed by two AS.5 V12 engines connected in series, with a total displacement exceeding 50 liters and an output of approximately 3100 horsepower. In modern applications, the Jenbacher J624 is a two-stage turbocharged V24 industrial engine with a power output of up to 4507 kilowatts, primarily used in large-scale power generation facilities. Bugatti once developed an innovative V24 configuration with 26 cylinders and 24 pistons, which could deliver 1001 horsepower with twin turbochargers, though it never entered mass production. Due to their complex structure, high cost, and maintenance challenges, such engines are seldom employed in civilian automotive applications and are more prevalent in scenarios demanding extreme performance or specialized requirements. Their design strengths include high power density and compact packaging, but engineers must address challenges like noise control, thermal management, and reliability.
Q
Does V16 mean 16 cylinders?
V16 does represent a 16-cylinder engine configuration, which is typically found in high-end luxury vehicles pursuing extreme performance. Cadillac launched models equipped with V16 engines in the 1930s; their unique 45-degree angle layout and dual carburetor design were technological breakthroughs at the time, with a displacement of 7.4 liters and a maximum power output of 165 horsepower. Modern V16 engines employ more advanced technologies—for instance, General Motors couples two V8 engines at a 90-degree angle to form a 13.6-liter displacement powertrain, capable of delivering a maximum power output of 1000 horsepower and a peak torque of 1355 Nm. This design is exemplified in concept vehicles such as the Cadillac Sixteen. Notably, due to their substantial size and exorbitant manufacturing costs, V16 engines are currently predominantly utilized in limited-edition or concept models, with their technical challenge residing in balancing high performance with compact dimensions. For average consumers, the more prevalent V6 or V8 engines suffice for daily driving requirements, whereas V16 embodies the automotive industry's quest for power extremes.
Q
What does 5.0 mean on a car?
The 5.0 marked on a car usually refers to an engine displacement of 5.0 liters, where "L" stands for the volume unit "liter", representing the total volume swept by the piston when it moves inside the cylinder. For a multi-cylinder engine, the displacement is the sum of the working volumes of all cylinders, which is one of the key parameters for measuring engine performance. Engines with larger displacements generally deliver greater power output and acceleration performance, but they also come with higher fuel consumption. If marked as 5.0T, it indicates the car is equipped with a 5.0-liter turbocharged engine. Turbocharging technology can enhance power output by approximately 40% through increased air intake, while also improving fuel efficiency. In daily use, special maintenance requirements for turbocharged models should be observed, such as allowing the engine to idle for cooling after high-speed operation and using premium-quality engine oil with regular replacements. Consumers should weigh power performance against operating costs according to their actual needs. High-performance models are better suited for drivers seeking an enhanced driving experience, while those prioritizing fuel economy may consider small-displacement or hybrid alternatives.
Q
Does V12 mean 12 cylinders?
Yes, V12 does mean that the engine has 12 cylinders. This configuration adopts a V-shaped arrangement, dividing the 12 cylinders into two banks with 6 cylinders each, symmetrically distributed at an angle between 60 and 90 degrees. V12 engines are renowned for their exceptional balance and smoothness. Since the two banks of cylinders fire alternately, vibrations cancel each other out, enabling low noise and smooth power output without the need for additional balancing devices. Such engines typically have a high displacement, ranging from 6.0L to 6.6L, and some high-performance versions can even achieve higher rotational speeds and power. For example, Ferrari's 6.5L naturally aspirated V12 can deliver 830 horsepower at 9500rpm. Due to their precise structure and high manufacturing costs, V12 engines are mainly used in top-tier luxury sedans and high-performance sports cars, such as the Mercedes-Benz S-Class, Ferrari Purosangue, and Lamborghini Aventador. Despite the challenges posed by the electrification trend, V12 engines continue to evolve through hybrid technology and maintain an irreplaceable position in the high-performance field.
View More