An Engine Diagnostic Check using a specialised scan tool allows us to identify problems in a vehicle's engine, transmission, exhaust system, brakes and other major components.

When your vehicle's 'Check Engine' light comes on, it's essential to diagnose the issue promptly to avoid any further damage. Here are the top 10 reasons why your 'Check Engine' light may turn on.

Firstly, an ignition system malfunction can cause the 'Check Engine' light to illuminate as it affects the vehicle's performance and emission output. Additionally, a damaged oxygen sensor that measures the oxygen level in exhaust gases can lead to excessive fuel consumption, resulting in the engine light turning on.

Secondly, a loose fuel cap can also cause the 'Check Engine' light to appear, as it allows oxygen to enter the fuel tank, negatively affecting the car's performance. Moreover, a faulty mass air flow sensor can cause the engine light to come on, as it helps the car's computer determine the air to fuel mixture.

Thirdly, a catalytic converter can turn toxic carbon monoxide into harmless carbon dioxide. However, if it fails, it will cause the engine light to turn on. Fourthly, issues with the emissions system can lead to performance problems and increase the vehicle's pollution, which will prompt the 'Check Engine' light to come on.

Furthermore, engine misfiring, which is an issue with combustion that causes a loss of power and fuel economy, could also prompt the 'Check Engine' light to come on. Low fluids in the car's oil, transmission fluid, or brake fluid levels can also cause the engine light to appear.

Lastly, a malfunctioning throttle body, which regulates the amount of air flowing to the engine, can affect engine performance and lead to engine light activation. Electrical system malfunctions, such as a blown fuse or bad spark plug, can also cause the engine light to turn on. It's best to have these issues diagnosed as soon as possible to avoid further damage.

You don't have to wait for a 'check engine light' to get a diagnostic test, if you feel something is off in your vehicle a diagnostic test can help pinpoint any areas of concern.