Oil Control Valve Functions and Malfunction Symptoms

Oil control valve is a vital part of every engine that is fitted with Variable Valve Technology. Responsible for controlling oil flow in the camshaft, it also helps in sustaining the functioning of engine’s internal moving parts. In addition, there are also many other inevitable benefits of using oil control valve such as efficient fuel consumption, reduce gas emissions generated by the vehicle, and improve engine performance.

However, its failure can sometimes cause the problem. Therefore, to know about the failing oil control valve symptoms, it is crucial to understand the basic functioning of it, beforehand.

Function Principle of Oil Control Valve in the Car system

This component has its own significance in any automobile smooth operation. Being regulated by engine control module, it is also known as engine oil solenoid valve.

This valve controls the flow of oil into the engine’s camshaft. If the oil does not reach inappropriate amount, it may hamper the normal functionality of the engine. Hence, oil control valve must open and close at the right times to lubricate the camshaft. In fact, it decides when to prevent the oil from entering or, let the oil goes out. The PCM/ECM will control the valve and let it know about the appropriate actions based on the engine’s performance demands.

Common Failing Oil Control Valve Symptoms

There are certain symptoms, which needs immediate attention for repair, and smooth functioning of oil control valve. Some of them include:

Repairing of Oil control valve in a Toyota car
Smooth functioning of Oil control valves

1. Poor Fuel Economy

This means the oil control valves are unable to regulate the oil flow in the system. Thus, causing the engine to over-perform and use more oil. Moreover, the exhaust valves would also open and close at the wrong time, which in turn would lead to more expenditure on gas.

Eventually, it would also damage the other internal components of the engine alongside drastically reducing the fuel economy.

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2. Slow Acceleration

Engine camshaft control valve
Engine camshaft control valve

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The defect in oil usage setting would directly affect the performance of car’s acceleration. One can check for this, by accelerating the car and noting the time taken to reach the desired speed. In simple words, if the car is unable to reach a 60km/h speed in a short time, then it’s the sign of disturbance in the oil control valve.

3. Ineffective Engine

For ensuring the flawless and superlative oil control valve, one must consider the variable valve timing system of the car. It generates the power required by the vehicle, which activates automatically when the RPM is higher than the normal. Even when the load on the car is more, especially on the upper hill road, it stimulates.

In this regard, if the Variable Valve Timing Solenoid is impaired, it can bring fluctuation in the revolutions thus, reducing the power of the vehicle.

Now, the question arises why this happen? Well, the main cause of damaged oil control valve is not replacing the oil timely. This negligence can cause impurity, leading to blockage and subsequently, preventing the oil from entering into the camshaft.

Now, it must be easier to detect the malfunctioning of the vehicle and work on its maintenance tips in order to prevent the large expenses.

What does an oil control valve do? Let’s check out the video below:

Watch the video below to know how to replace oil control valve in Toyota cars

Hopefully with this article, you will get a deep knowledge about oil control valve, what does an oil control do and its bad symptoms. If you have any question about the topic or any car question, feel free to leave us a comment below, our auto experts will answer it for you.