Skip the auto shop - Our mechanics make house calls

Q: Code P0330

asked by on

I am getting code P0330 - Knock Sensor 2 Circuit Malfunction. I reset it, but it keeps coming back on after a few minutes of driving. Is it a faulty sensor? The car drives normal.

Hello! A knock sensor code can indicate faulty wiring to the sensor, or a faulty sensor itself. The wiring of the knock sensor can be checked by performing a continuity test, and the resistance of the knock sensor can be checked with a multimeter; if these are not up to specifications, a repair of the wiring or replacement of the sensor will be necessary. A knock sensor could also set a Check Engine Light due to bad gas. I suggest adding some premium gasoline, or a fuel treatment, to the tank to see if that helps keep the warning light off. It would also be a good idea to have a certified mechanic, such as one from YourMechanic, perform the aforementioned tests in order to properly diagnose the cause of your Check Engine Light illumination.

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: Over heating

If you have really found evidence of cooling system blockage(s), then your continued overheating could simply be due to the fact that not all blockages are yet removed. Also, you could have multiple faults, that is blockages plus perhaps a...

Q: Buying a 2007 CTS

A pre-purchase vehicle inspection is a good idea. That inspection, carried out by a certified Mechanic, dispatched to your location, will give you very specific data regarding any current problems that the car has. You have additional opportunities, too, in...

Q: Purchasing a used car that has been sitting for 7 years - worth considering?

If the car sat with gasoline in the tank for 7 years, you probably will have to clean the fuel system, notably the fuel injectors and change the fuel filter. The other principle issue is corrosion. Parts such as the...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
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.