Honda VTEC Solenoid Symptoms (9 Things To Be Aware Of)

The Honda VTEC solenoid regulates the oil flow into the inner galleries of your vehicle’s overhead camshaft.

Variable Valve Timing and Lift Electrical Control (VTEC) is a mechanical and electronic technology that enables your engine to have multiple camshafts. Look what I found out about it!

Honda VTEC Solenoid Symptoms

1. Rough Engine Idle

Among the most common signs of a faulty VTEC solenoid is a poor idle at low RPM that only clears at high RPM.

If your Honda VTEC solenoid fails, the valve frequency does not advance or retard as it should.

As a result, the engine suffers from performance concerns such as choppy idle and weak acceleration.

2. Check Engine Light Display On Dashboard

After a period of driving, the Check Engine Light displays: It is among the most prevalent symptoms of a defective VTEC solenoid.

Of course, the light may activate if the solenoid fails or there is an issue with its connectivity to the entire system, like so much pressure.

Most modern engines are automated and will notify you as soon as they discover a problem.

3. Decreased Fuel Efficiency

A VTEC solenoid’s primary function is to manage the open and close timing of the valves to improve fuel economy. As a result, if your VTEC solenoid fails, your fuel economy will suffer.

So, if you observe that the fuel economy of your Honda vehicle has dropped significantly, the VTEC solenoid has likely ceased.

Therefore, to improve fuel efficiency, the ideal remedy in this circumstance is to change the damaged VTEC solenoid with a fresh new one.

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4. Oil Leakage

Another sign of a significant engine oil spill is slowed and worsens with time. The VTEC solenoid’s primary objective is to enable oil to flow to the interior galleries of the overhead camshaft.

Of course, it signifies that the VTEC solenoid enclosure prevents full engine oil pressure from being applied.

Further, the inserted rubber gasket typically hardens and shrinks over time, resulting in an oil leak that increases as the rubber keeps shrinking and hardening.

Therefore, to avoid leaking, keep an eye on the rubber gasket and consider replacing it regularly.

5. Filthy Engine Oil

Filthy Engine Oil

Another typical sign of a faulty VTEC solenoid is filthy engine oil. However, when your engine oil is clean, this critical component generally operates optimally.

So, if your engine oil contains a lot of contaminants, it will reduce its viscosity, blocking the VTEC solenoid system; then, if the problem is not resolved quickly, it will result in destruction.

In addition, if you have a check engine light on your dashboard and your engine oil is filthy, the VTEC solenoid has most likely failed.

So, the remedy to this issue is to replace your engine oil regularly to avoid harming the VTEC solenoid.

6. Sputtering Mode

Bad electrical wiring can also cause sputtering engine problems due to faulty VTEC solenoid and bad wiring connections on these circuit boards.

That said, it could lead to either an electrical short or overload of circuits within this particular system, which will cause damage over time if left unchecked.

However, these things are not always easy to diagnose without technical support from expert mechanics and technicians.

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7. Loses Power When Idling Or Driving

If you’re ever in doubt about why your car is struggling to start, it’s a good idea to check your VTEC solenoid.

Since, your VTEC solenoid is responsible for the VTEC system that helps you get power out of your engine when you’re not moving.

Therefore, it also controls the timing and fuel injection of your car’s engine.

So, if your VTEC solenoid is not working properly, or if there is a problem with the wiring harnesses that connect it to the rest of your engine, this can cause issues with starting your vehicle as well as during driving and idling.

8. Engine Run Hot While Accelerating

When your Honda VTEC Solenoid is not working properly, you may notice that the engine runs hot after a few seconds of accelerating.

This is because the VTEC solenoid controls how much air enters the intake manifold, which affects how much fuel is sent to each cylinder.

So, when this system does not work properly, it can cause the engine to run hot and possibly cause damage to other systems in your vehicle.

9. Unnecessary Engine Noises

Honda VTEC solenoid is a part of the engine that makes sure that when it’s time to shift, it does so in the best way possible.

Further, it’s also responsible for making sure that the engine doesn’t rev up too high or too low.

Therefore, if your Honda VTEC solenoid isn’t working properly, you may start to notice an increase in engine noise.

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To know more, you can also read our posts on powertrain control module symptoms, Honda Accord PCV valve symptoms, and Honda Accord idle control valve symptoms.


The Honda VTEC solenoid is a critical component that regulates the oil flow to the interior galleries of the overhead camshaft. As a result, you must always keep it in prime condition.

So, if it exhibits any of the symptoms mentioned above, take it to a reputable technician to get it serviced or replaced.

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