Skip the auto shop - Our mechanics make house calls

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.

A: Hello. In newer vehicles with electronic fu...

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 1000 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!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Car shaking and misfiring

Hi. The first thing to do is check the codes stored in the engine computer. If the engine is indeed misfiring, codes will be stored. The source of the misfire will need to be identified, possible faults include a failing...

Q: Hi, I have a Scion XA 2006. Last year I noticed a squeeking sound while starting the car. It went away the second I drove out of t

Hello. There are a couple of common causes of this noise on your vehicle. Most of the time this is caused by a failing belt tensioner, a bad water pump, or a failing alternator. All of these will cause this...

Q: Engine Power Reduced TPS

Hi! Yes the throttle position sensor could very well be the cause. I highly doubt that it is the oxygen sensor though. When the throttle position sensor goes bad the engine will put itself into reduced power mode. I was...

Related articles

How to Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
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.