What is a variable valve timing (VVT) oil control valve?
The variable valve timing (VVT) oil control valve is a part of the VVT system in your engine. The VVT system adjusts the timing of your engine’s intake or exhaust valves, and the VVT oil control valve controls the engine oil’s flow to a VVT actuator. This process improves engine performance, increases fuel efficiency, and lowers emissions from your vehicle’s combustion process.
When should I replace the variable valve timing (VVT) oil control valve on my car?
The most common symptoms of a bad oil control valve include:
Check engine light: If there is something wrong with your VVT oil control valve, your engine control unit (ECU) or powertrain control module (PCM) will detect it. If detected, your VVT oil control valve issue will cause your check engine light to illuminate on your dashboard.
Engine misfiring: A malfunctioning VVT oil control valve will throw off your valve timing, which can lead to engine misfires.
Reduced power and performance: Incorrect valve timing from a bad VVT oil control valve can reduce your vehicle’s power and performance. Performance issues will be especially obvious when you attempt to accelerate, or when you’re driving at low RPMs.
Acceleration issues: If your VVT oil control valve is malfunctioning, you may experience trouble acceleration. Your car may hesitate or jerk when you apply pressure to the gas pedal.
Rough idling: You may feel instability or vibrations coming from your car’s engine while idling if your VVT oil control valve is damaged or malfunctioning.
Higher emissions: A problem with the VVT system increases your vehicle’s emissions. Note that if your emissions are higher due to a faulty VVT oil control valve, you will not pass an emissions test, which is usually required for registering your car.
Lower fuel efficiency: A faulty VVT oil control valve can cause increased fuel consumption, which will reduce your gas mileage and fuel efficiency.
Engine noises: If your VVT oil control valve is faulty, you may hear a knocking noise coming from the engine’s cylinders. A pinging sound is also common for improper valve timing.
Car won’t start: You may experience difficulty starting your car if your VVT oil control valve is damaged.
How often should a variable valve timing (VVT) oil control valve be replaced?
Unlike other vehicle components that require regular maintenance and replacements, there is no replacement interval for a VVT oil control valve. Instead, VVT oil control valves should be replaced in cases of damage.
Regularly check the state of your VVT oil control valve to ensure it is functioning normally. A damaged VVT oil control valve can affect the longevity and performance of your engine.
Can I replace my variable valve timing (VVT) oil control valve myself?
You may be able to replace your variable valve timing (VVT) oil control valve yourself, but the replacement process is slightly complex and requires a fair and comprehensive understanding of your vehicle’s engine. It’s best to skip the DIY auto repair and take your car to a certified mechanic if you need your variable valve timing (VVT) oil control valve replaced.