Q: My car knocks - 2006 Toyota Yaris

asked by on

I cleaned its throttle body and replaced air cleaner,changed its spark plug. and using high octane fuel and also cleaned its main air sensor next to air cleaner....but there is heavy knocking...its 2szfe...1.3cc engine

My car has 153000 miles.
My car has an automatic transmission.

Hello. In newer vehicles with electronic fuel injection and ignition systems, engine knocking due to bad fuel or spark is extremely rare. In most cases, if the knocking sound is consistent and increases in speed as the RPM increases, it’s caused by lower levels of oil or oil lubrication issues. To see if this is the case, check your oil level or have the oil changed and see if this clears up the problem. If not, you may need the assistance of a professional mechanic to inspect and diagnose the engine noise.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  1. Home
  2. Questions
  3. My car knocks - 2006 Toyota Yaris

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: I change the spark plug, cord and 02 sense but still running bad. No get up p Power light stay on.

What problem codes are set that are causing the Check Engine light? The engine may be running in "limp mode". There are many sources of poor performance, including a clogged catalytic converter, given the advanced mileage on this vehicle. But...

Q: White Smoke From Car Hood

It sounds like you may have had a faulty coolant fan relay. The coolant fan relay helps to maintain the proper coolant temperature by turning on and off at specific temperature thresholds. When this relay is not working properly, this...

Q: Car accelerates without me pushing the pedal

The very first thing to do is to make sure the floor mat in the floor is not out of position and causing the gas pedal to be touched by the carpet or floor mat. If mat is deformed then...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.