Skip the auto shop - Our mechanics make house calls

Q: Car has developed a knocking sound

asked by on

My car has 6,000 miles on it and the engine has recently started making a knocking sound. I can it inside the car, and it is very noticeable outside the car as well. I first heard it a few days ago when my son was pulling the car into the garage, and I was standing outside the car. It makes a knocking sound, which reminded me of how a diesel engine sounds. The engine runs smoothly and sounds fine, except when idling. I took it to the dealership, and they heard the noise and didn't know what it was. I left the car there, and they called me the next day and said they have Nissan techline involved. I haven't heard back from them yet. Any ideas what this could be from?

A: Though your vehicle’s mileage is extremely ...

Though your vehicle’s mileage is extremely low to have this sort of issue, the most likely cause is a rod knock from the engine. Generally, this happens when engines run very low on oil or high mileage. The most likely time to have problems with new vehicles is within the first few thousand miles, since this when assembly line issues will begin to surface. If you need a second opinion on the car, a technician from YourMechanic can come to your location to diagnose the car noise and let you know what repairs are appropriate.

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

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: Won't change gears p2768

Hello there, this is not an uncommon occurrence. The P2768 code is referencing a fault with the input speed sensor. When this occurs the transmission may suffer during gear changes since the car's computer can not tell it when the...

Q: Do I have a bad coolant temperature switch?

In order to verify that the coolant sensor's output reading is correct, you will need to have the engine computer system scanned and look at the data before the engine is even started. The temperature of the coolant sensor and...

Q: What does the door and trunk open warning mean?

There are quite a few different warnings and indicators that can be displayed in your vehicle information center. If you see an indicator that looks like the outline of a car with one door open, and words “Warning Door Open”,...

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 P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
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...
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...