How A Failed Vvt Solenoid Is Detected

The Variable valve timing also called VVT, has been existing since the 1960s. The VVT is basically the name given to a wide array of techniques that is in place to produce greater power from the engine at great speeds or when the engine comes under a load  or pressure.

Different automobile manufacturers have different variable valve timing systems, yet about all of them depend on a variable valve timing solenoid to moderate the flow of oil to the VVT system when engaged since VVT does not work on idle, and only operates during higher speeds/ when there is a load need. Thus when the solenoid is put on, oil is transferred from the system to lubricate the VVT chain and gear. However, when the solenoid has failed or is clogged, the system will not function and will need replacement. Below are tale tale signs of a failed or an about to fail solenoid.

The Check Engine Light

One of the very first signs that might show a bad or failing VVT solenoid is the Check Engine Light that comes up on your dash. This indicates that a code has been sent and stored on the vehicle’s computer. Checking the code will provide more information about the specific fault. You must however, know  that there are other different generic VVT-related codes, as well as other specific codes that are used by different specific vehicle manufacturers. If your Check Engine Light comes up at any time, prompt investigation should be performed.

Dirt Or Dirty Oil

Since the VVT system makes use of oil, dirty oil can bring issues, particularly for the VVT solenoid. If your engine oil has gotten dirty, it should be replaced before any other thing about diagnoses is performed. Debris in the oil can buildup in the system and make the VVT inoperable or erratic.

Low or Reduced Engine Oil

Because oil is vital to an operable VVT system. If the engine oil becomes low, there’s a possibility that the solenoid is not able to transfer oil to the VVT system during use and this will create damage to the VVT chain/gear. This has nothing to do with a damaged solenoid.

Rough Idling

Even when the variable VVT system does not idle, a failed solenoid can create a rough idle.

Loss Of Fuel Economy

Another symptom of a failing VVT solenoid is a loss of fuel economy. This occurs because the system is no longer able toregulate the amount of intake and exhaust valve overlap present during engine operation.