Q: Check Engine Light is on - code P0328

asked by on

I just had my vehicle in for regular service. While being serviced it was noted that my cylinder head was leaking as well as the vacuum pump. The technician replaced the valve cover gasket, resealed the cylinder head cover as well as resealing the cover and replacing the seal for the vacuum pump. I drove the car home later that day with no issues. Upon starting the car up 4-5 hours later to go to dinner, the check engine light came on. I went the next day to the local AutoZone to have the code ran, and was told it was a P0328 Knock Sensor Circuit High Input. My question is first, how serious a problem is this? As in, should we get the vehicle in to the shop tomorrow, or can it wait the four days until the weekend. Second, based on the work done to my vehicle would that in anyway be able to cause this code to happen?
My car has an automatic transmission.

Hi there. A failure of the engine knock sensor is a somewhat risky issue with a turbocharged engine such as yours. Turbocharging increases cylinder pressure during operation and makes the engine more likely to experience "pre-detention" or knocking. The knock sensor is critical in detecting this and retarding engine timing to avoid this destructive issue. If it is essential to drive a few days with this problem, take care to keep your foot out of the gas as much as possible. Yes, it is possible that replacing the valve cover gasket required the knock sensor to be disconnected. Your problem may be solved by simply reconnecting an unplugged cable. I would check with the service center that replaced the valve cover gasket just in case.

If you need any assistance, then I recommend having a certified technician, such as one from YourMechanic, come to your location to determine why the Check Engine Light is on and suggest the necessary repairs.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Check Engine Light is on - code P0328

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: Check Engine Light is on. P0430 code.

The Check Engine Light on for code P0430 is for the right (passenger side) O2 sensor indicating a bad catalyst on the passenger side or right side of the vehicle. Before replacing the catalyst, check all the engine ground connections...

Q: Hi, I’m in an emergency situation. Where do I put radiator stop leak in my 98 Beetle. I have water in the reservoir

Hi Claudette. Thank you for contacting us tonight. Actually, using stop leak is NOT something that would fix this issue. If the overflow reservoir is leaking, then it needs to be replaced. Stop leak is made for radiator leaks, but...

Q: Engine tick and check engine light.

Hello, thanks for writing in. It is possible that you have a fuel injection issue, but that is not that common on this vehicle. Most of the time when this occurs with a ticking noise also it is due to...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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...
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...