5 Warning Signs of Engine Failure You Should Not Ignore

Utsav Das
Est. Reading Time 4 mins


One of the primary reasons for engine failure is lack of timely maintenance – failing to replace the engine oil, coolant, and filters during regular intervals leads to reduced engine performance before turning into a catastrophic failure. Also, failing to check on parts like the clutch and spark plugs for wear and tear could damage the engine.

Before the engine fails, it gives sure warning signs you can’t miss! Let’s review the 5 warning signs of engine failure below to get a clearer picture.

1. Check the engine light

Every car has a check engine light on its dashboard. Whenever something goes wrong with a vehicle’s engine, any component or sensor affecting the engine’s normal functioning, the warning light flashes on the dashboard. Nowadays, cars have an onboard self-diagnostic setup that works as a  reporting system. This system triggers the warning signal whenever there is a problem, minor or major. Depending on the issue, get your car checked by an expert!

2. Smoke coming out of the exhaust

A little bit of smoke coming from the vehicle once in a while during winter is very normal, but if your car emits black, blue, or thick white smoke whenever the engine is running, you might have to get it checked by an expert! Black smoke suggests a problem with the fuel supply or a disproportionate fuel mix. If the smoke tends to be somewhat grey, it indicates that the petrol/diesel is entering the combustion room, which is not a good sign. Thick white smoke indicates the burning of engine oil along with the fuel.

3. Problems while driving

A smooth car is a good car. When a vehicle starts facing problems while driving, there might be an underlying issue. Fuel lines getting clogged, spark plugs fouled, damaged ignition coils, and dirty fuel/air filters are all causes of a car’s poor performance. Cars nowadays have well-equipped systems to manage air-to-fuel ratio and airflow sensors, but to leave them alone to work is not a good practice. Regular checkups and cleaning can help you avoid major engine failures.

4. Loss of mileage and poor performance

Over time, a car tends to lose its mileage (fuel economy) and power gradually due to wear and tear. However, if the car loses its power drastically or mileage drops significantly, the car’s engine needs attention. Sometimes minor problems might be lurking behind the engine, causing significant damage to the vehicle over a period of time.

5. Engine knocking

Engine knocking is when a small portion of the air-fuel mixture starts burning independently without ignition. It may not be a loud sign, but if you can hear a constant knocking from the engine, it’s best to get it checked immediately. If ignored, it can result in a lot of damage to the engine hence, costly repair.

Apart from these, there are many other signs that you can look out for before engine failure as well, like foul smells coming out of the car, oil patches on the ground below car parking, excessive overheating, loud noise, and excessive vibration of the vehicle. Trivial issues can be rectified easily, but when it comes to issues such as drastic mileage drop and poor car performance, it is best advised by experts not to ignore them. It’s highly advisable to go to your nearest car service center and get your car’s engine checked by a professional.

Preventive Measures for Engine Health

Ensuring the longevity and performance of your vehicle’s engine requires diligent care and regular preventive measures. Here’s a detailed explanation and illustration of key preventive practices for engine health:

Regular Maintenance Practices

Importance of Following Maintenance Schedules

Adherence to Manufacturer's Guidelines: Manufacturers provide a detailed maintenance schedule tailored to each vehicle model. This schedule includes timely oil changes, filter replacements, and inspections of crucial engine components.

Preventing Major Failures: Regular maintenance helps identify and address minor issues before they escalate into major problems. Early detection can prevent catastrophic engine failures that are often costly to repair.

Optimal Performance and Efficiency: Sticking to the maintenance schedule ensures that the engine operates at its peak efficiency. This not only extends the engine's lifespan but also enhances fuel economy and overall vehicle performance.

Role of Gasoline and Oil Additives in Preventing Deposits

Gasoline Additives: High-quality gasoline often contains additives designed to clean the fuel injectors, intake valves, and combustion chambers. These additives prevent the build-up of carbon deposits that can impair engine performance.

Oil Additives: Engine oil additives play a crucial role in maintaining the oil's viscosity, reducing friction, and protecting against wear. They also help in preventing sludge and deposit formation within the engine.

Combating Engine Knock and Pre-Ignition: Additives in gasoline help in increasing the fuel’s octane rating, which is essential in preventing engine knock and pre-ignition, especially in high-compression engines.


Servicing your car at regular intervals and timely replacement of engine oil, oil filter, coolant, air filter, and plugs are the key to the engine’s longevity. CARS24 offers expert car service at the lowest prices, that too with a free pick up and drop! Try now.

Adhering to a regular maintenance schedule and using quality gasoline and oil additives are pivotal in preserving engine health. Regular maintenance helps in early detection and prevention of potential engine problems, ensuring optimal performance and efficiency. Gasoline and oil additives play a significant role in keeping the engine clean and preventing harmful deposits, thereby extending the engine's life and maintaining its performance. By taking these preventive measures, vehicle owners can enjoy a reliable and well-functioning engine for years to come.

Happy driving!

Looking to buy a used car? CARS24 cars come with a 12 Months Warranty. Buy from thousands of cars online and get it delivered to your doorstep. Love it or return it with our 7-Day Easy Return Policy.


One of the primary reasons for engine failure is lack of timely maintenance – failing to replace the engine oil, coolant, and filters during regular intervals leads to reduced engine performance before turning into a catastrophic failure. Also, failing to check on parts like the clutch and spark plugs for wear and tear could damage the engine.

Before the engine fails, it gives sure warning signs you can’t miss! Let’s review the 5 warning signs of engine failure below to get a clearer picture.

1. Check the engine light

Every car has a check engine light on its dashboard. Whenever something goes wrong with a vehicle’s engine, any component or sensor affecting the engine’s normal functioning, the warning light flashes on the dashboard. Nowadays, cars have an onboard self-diagnostic setup that works as a  reporting system. This system triggers the warning signal whenever there is a problem, minor or major. Depending on the issue, get your car checked by an expert!

2. Smoke coming out of the exhaust

A little bit of smoke coming from the vehicle once in a while during winter is very normal, but if your car emits black, blue, or thick white smoke whenever the engine is running, you might have to get it checked by an expert! Black smoke suggests a problem with the fuel supply or a disproportionate fuel mix. If the smoke tends to be somewhat grey, it indicates that the petrol/diesel is entering the combustion room, which is not a good sign. Thick white smoke indicates the burning of engine oil along with the fuel.

3. Problems while driving

A smooth car is a good car. When a vehicle starts facing problems while driving, there might be an underlying issue. Fuel lines getting clogged, spark plugs fouled, damaged ignition coils, and dirty fuel/air filters are all causes of a car’s poor performance. Cars nowadays have well-equipped systems to manage air-to-fuel ratio and airflow sensors, but to leave them alone to work is not a good practice. Regular checkups and cleaning can help you avoid major engine failures.

4. Loss of mileage and poor performance

Over time, a car tends to lose its mileage (fuel economy) and power gradually due to wear and tear. However, if the car loses its power drastically or mileage drops significantly, the car’s engine needs attention. Sometimes minor problems might be lurking behind the engine, causing significant damage to the vehicle over a period of time.

5. Engine knocking

Engine knocking is when a small portion of the air-fuel mixture starts burning independently without ignition. It may not be a loud sign, but if you can hear a constant knocking from the engine, it’s best to get it checked immediately. If ignored, it can result in a lot of damage to the engine hence, costly repair.

Apart from these, there are many other signs that you can look out for before engine failure as well, like foul smells coming out of the car, oil patches on the ground below car parking, excessive overheating, loud noise, and excessive vibration of the vehicle. Trivial issues can be rectified easily, but when it comes to issues such as drastic mileage drop and poor car performance, it is best advised by experts not to ignore them. It’s highly advisable to go to your nearest car service center and get your car’s engine checked by a professional.

Preventive Measures for Engine Health

Ensuring the longevity and performance of your vehicle’s engine requires diligent care and regular preventive measures. Here’s a detailed explanation and illustration of key preventive practices for engine health:

Regular Maintenance Practices

Importance of Following Maintenance Schedules

Adherence to Manufacturer's Guidelines: Manufacturers provide a detailed maintenance schedule tailored to each vehicle model. This schedule includes timely oil changes, filter replacements, and inspections of crucial engine components.

Preventing Major Failures: Regular maintenance helps identify and address minor issues before they escalate into major problems. Early detection can prevent catastrophic engine failures that are often costly to repair.

Optimal Performance and Efficiency: Sticking to the maintenance schedule ensures that the engine operates at its peak efficiency. This not only extends the engine's lifespan but also enhances fuel economy and overall vehicle performance.

Role of Gasoline and Oil Additives in Preventing Deposits

Gasoline Additives: High-quality gasoline often contains additives designed to clean the fuel injectors, intake valves, and combustion chambers. These additives prevent the build-up of carbon deposits that can impair engine performance.

Oil Additives: Engine oil additives play a crucial role in maintaining the oil's viscosity, reducing friction, and protecting against wear. They also help in preventing sludge and deposit formation within the engine.

Combating Engine Knock and Pre-Ignition: Additives in gasoline help in increasing the fuel’s octane rating, which is essential in preventing engine knock and pre-ignition, especially in high-compression engines.


Servicing your car at regular intervals and timely replacement of engine oil, oil filter, coolant, air filter, and plugs are the key to the engine’s longevity. CARS24 offers expert car service at the lowest prices, that too with a free pick up and drop! Try now.

Adhering to a regular maintenance schedule and using quality gasoline and oil additives are pivotal in preserving engine health. Regular maintenance helps in early detection and prevention of potential engine problems, ensuring optimal performance and efficiency. Gasoline and oil additives play a significant role in keeping the engine clean and preventing harmful deposits, thereby extending the engine's life and maintaining its performance. By taking these preventive measures, vehicle owners can enjoy a reliable and well-functioning engine for years to come.

Happy driving!

Looking to buy a used car? CARS24 cars come with a 12 Months Warranty. Buy from thousands of cars online and get it delivered to your doorstep. Love it or return it with our 7-Day Easy Return Policy.

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