What are some common problems with the Toyota Yaris engine?

I have been experiencing some issues with my Toyota Yaris engine recently. What are some possible problems that could be causing this and how can I fix them?

One common problem with the Toyota Yaris engine is a faulty mass air flow sensor. This can cause issues with acceleration and engine performance. You may need to replace the sensor to fix this issue.

Another potential issue is a clogged fuel filter. This can cause the engine to run poorly and may lead to stalling. Try replacing the fuel filter to see if it improves the engine's performance.

A worn or damaged spark plug can also cause problems with the engine, such as misfiring and difficulty starting the car. Make sure to regularly check and replace your spark plugs to keep your Toyota Yaris running smoothly.

If you notice a knocking sound coming from the engine, it could be a sign of low oil pressure. Check your oil levels regularly and top up if needed to avoid potential engine damage.

In some cases, a faulty oxygen sensor can cause issues with the engine's performance and fuel efficiency. Have your mechanic check and replace the sensor if necessary.