Skip the auto shop - Our mechanics make house calls

P0326 OBD-II Trouble Code: Knock Sensor Range/Performance (Bank 1 or Single Sensor)

check engine light logo

P0326 code definition

Knock Sensor 1 Circuit Range/Performance (Bank 1 or Single Sensor)

What the P0326 code means

The P0326 code means that the Engine Control Module (ECM) has detected a reference voltage from the knock sensor that has fallen outside the threshold of acceptance set by the manufacturer.

The knock sensor’s job is to inform the ECM of any abnormal engine noises that may be occurring, such as spark knock.

What are the causes of the P0326 code?

This code is sometimes accompanied by other codes, and it is important to address these other issues first. If no other engine issues exist but a P0326 code is still present, some potential causes of the P0326 code may include:

  • Damaged wiring or connectors associated with the knock sensor
  • A faulty knock sensor
  • A connector that has come unplugged
  • A faulty ECM

What are the symptoms of the P0326 code?

  • Loss of power
  • Hesitation upon acceleration
  • Spark knock
  • Check Engine Light illumination
  • Abnormal engine noise

How does a mechanic diagnose the P0326 code?

If this code is accompanied by any other trouble codes, the mechanic would resolve those issues first. If no other issues exist, the mechanic would visually inspect the knock sensor to ensure that it is plugged in, the wiring is not damaged, and that is is functioning properly.

To ensure the functionality of the knock sensor, the mechanic may test it with a digital multimeter using the manufacturer’s recommended procedure. If any issues are found during this test, the faulty parts would be replaced at the customer’s request.

If no issues were found, the ECM would be tested next and replaced if necessary.

Common mistakes when diagnosing the P0326 code

This is a code where it is easy to misdiagnose the problem due to the fact that a particular part is mentioned in the trouble code itself. If this code is stored in your vehicle, do not just replace the knock sensor. Ensure that the sensor is malfunctioning before replacing it.

How serious is the P0326 code?

If other codes are associated with this code, it can be more serious than if this code were set by itself. The other codes that may cause this code to pop up can cause very serious drivability issues and may cause the engine not to run at all. If the P0326 code is stored by itself, it is likely that the driver can drive on it for a short time before having the issue resolved.

What repairs can fix the P0326 code?

  • Replacing the knock sensor
  • Repairing or replacing any wiring or connectors that are associated with the knock sensor.
  • Plugging the knock sensor back in
  • Replacing the Engine Control Module

Additional comments regarding the P0326 code?

Spark knock can be very loud and is usually immediately noticeable to the driver. If the engine in your vehicle starts to sound abnormal while it is running, be sure to have the issue resolved as soon as possible to prevent any further engine damage.

Need help with a P0326 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
Icon-warranty_badge-02

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

More 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...
How to Transfer a Car Title in Idaho
In order to prove ownership of a car, you must have the title. However, when a car is sold, given away or inherited, the title needs...
The Traveler’s Guide to Driving in Malaysia
CraigBurrows / Shutterstock.com Malaysia is a popular destination for many tourists today. The country has amazing sights and attractions that you will want to explore....


Related questions

Q: Its misfiring on cyl 5 and has a code for an o2 sensor.

Diagnostic Trouble Code P0305 means that Cylinder No. 5 is misfiring but the causes of that can be very varied. Check the plug, secondary wire, and distributor cap. The fuel injector to the cylinder could simply be faulty or there...

Q: Car says energy power reduced then engine light came on

The first thing to do would be to have the Check Engine Light trouble code pulled from the car for a place to start. Common problems are things like a faulted throttle body motor or throttle body position sensor which...

Q: Could a problem with the knock sensor keep my car from starting?

Hi there. A problem with the knock sensor or knock sensor circuit can definitely make starting a vehicle more difficult. A knock sensor is used by engineers to help the engine's computer sense possible internal engine failure before it becomes...