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.

A: Hello! A knock sensor code can indicate fau...

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・Save up to 30%

Get a quote

What others are asking

Q: Car still overheating, and hissing, even after changing the coolant.

Hi there. Some coolant leaks can be hard to find and may only appear when the system is under pressure. If you are getting a hissing noise it is possible that you have a leaking hose, but most of the...

Q: Car overheated and blew out coolant

Coolant can leak from a variety of places. The system, when warm, is under pressure; 22 psi on your A4 Quattro. Even when the engine is at normal operating temperature, when a sudden leak occurs, it can “blow” everywhere. If...

Q: Car stalls and P0401 insufficient egr flow

The P0401 code is for low EGR flow, but would not be the cause of the stalling if the flow was too low. You also state the problem is when the engine is cold and goes away after it is...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...