AutoCodes – GMC – P0324 2014 GMC Sierra

P0324 2014 GMC Sierra Code - Knock Sensor System Performance

Quick Answer

The Knock Sensor system enables the Engine Control Module (ECM) to control the ignition timing for the best possible performance while protecting the engine from potentially damaging levels of detonation, also known as spark knock. Common causes include Faulty Knock Sensor, Knock Sensor circuit poor electrical connection, Knock Sensor harness is open or shorted. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P0324 2014 GMC Sierra indicates Knock Sensor System Performance.
Common causes: Common causes include Faulty Knock Sensor, Knock Sensor circuit poor electrical connection, Knock Sensor harness is open or shorted.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 398

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 13, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P0324 2014 GMC Sierra Description

The Knock Sensor system enables the Engine Control Module (ECM) to control the ignition timing for the best possible performance while protecting the engine from potentially damaging levels of detonation, also known as spark knock. The knock sensor system uses one or two flat response 2-wire sensors. The sensor uses piezo-electric crystal technology that produces an AC voltage signal of varying amplitude and frequency based on the engine vibration or noise level. The amplitude and frequency are dependent upon the level of knock that the knock sensor detects. The ECM receives the knock sensor signal through two isolated signal circuits for each knock sensor.
The control module learns a minimum noise level, or background noise, at idle from the knock sensor and uses calibrated values for the rest of the RPM range. The control module uses the minimum noise level to calculate a noise channel. A normal knock sensor signal will ride within the noise channel. As engine speed and load change, the noise channel upper and lower parameters will change to accommodate the normal knock sensor signal, keeping the signal within the channel. In order to determine which cylinders are knocking, the control module only uses knock sensor signal information when each cylinder is near the Top Dead Center (TDC) of the firing stroke. If a knock is present, the signal will range outside of the noise channel.
If the control module has determined that a knock is present, it will retard the ignition timing to attempt to eliminate the knock. The control module will always try to work back to a zero-compensation level, or no spark retard. An abnormal knock sensor signal will stay outside of the noise channel or will not be present. knock sensor diagnostics are calibrated to detect faults with the knock sensor circuitry inside the control module, the knock sensor wiring, or the knock sensor voltage output. Some diagnostics are also calibrated to detect constant noise from an outside influence such as a loose/damaged component or excessive engine mechanical noise.
The Diagnostic Trouble Code (DTC) will be set when an excessively low or high voltage from the sensor is sent to ECM.

OBDII Code P0324 2014 GMC Sierra - Knock Sensor System Performance - AutoCodes.com — P0324 2014 GMC Sierra Code - Knock Sensor System Performance

What does this mean?

What are the Possible Causes of the DTC P0324 2014 GMC Sierra?

Faulty Knock Sensor
Knock Sensor circuit poor electrical connection
Knock Sensor harness is open or shorted
Faulty Engine Control Module (ECM)

How to Fix the DTC P0324 2014 GMC Sierra?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0324 2014 GMC Sierra code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P0324 2014 GMC Sierra code?

Need more information on how to fix the P0324 2014 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0324 2014 GMC Sierra code diagnosed by a professional: Find a repair shop in your area

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0324 2014 GMC Sierra Code

1. What are the common symptoms of OBDII code P0324 in a 2014 GMC Sierra?

The common symptoms of P0324 in a 2014 GMC Sierra include engine knocking sounds, reduced engine performance, and possible illumination of the check engine light.

2. What could be causing the OBDII code P0324 in a 2014 GMC Sierra?

The most common cause of code P0324 in a 2014 GMC Sierra is a malfunctioning knock sensor or issues with the knock sensor circuit.

3. How does a malfunctioning knock sensor affect the performance of a 2014 GMC Sierra?

A malfunctioning knock sensor can lead to incorrect timing adjustments by the engine control module, resulting in poor engine performance, reduced fuel efficiency, and potential engine damage.

4. Can driving with OBDII code P0324 in a 2014 GMC Sierra cause further damage?

Continuing to drive with code P0324 in a 2014 GMC Sierra can potentially cause engine damage over time due to the engine running with incorrect timing adjustments.

5. How can I diagnose and repair OBDII code P0324 in my 2014 GMC Sierra?

Diagnosing and repairing code P0324 usually involves testing the knock sensor and its circuit using a multimeter, checking for any loose connections, and replacing the knock sensor if necessary.

6. Is it safe to continue driving my 2014 GMC Sierra with a faulty knock sensor triggering code P0324?

It is not recommended to drive your 2014 GMC Sierra with a faulty knock sensor triggering code P0324, as it can lead to poor engine performance and potential engine damage.

7. Will resetting the check engine light resolve OBDII code P0324 in a 2014 GMC Sierra?

Simply resetting the check engine light will not resolve code P0324 in a 2014 GMC Sierra. The underlying issue causing the code needs to be diagnosed and repaired.

8. Can extreme weather conditions trigger OBDII code P0324 in a 2014 GMC Sierra?

Extreme weather conditions can potentially affect the performance of the knock sensor and trigger code P0324 in a 2014 GMC Sierra, but it is usually a sign of an underlying issue with the sensor itself.

9. How much does it typically cost to replace a knock sensor in a 2014 GMC Sierra to address OBDII code P0324?

The cost of replacing a knock sensor in a 2014 GMC Sierra can vary depending on the labor rates and the specific sensor required, but it typically ranges from $150 to $300 for parts and labor.

10. Can a DIY enthusiast replace a knock sensor to fix OBDII code P0324 in a 2014 GMC Sierra?

Replacing a knock sensor to address code P0324 in a 2014 GMC Sierra can be a complex task that may require some mechanical knowledge and tools. It is recommended to consult a professional mechanic for proper diagnosis and repair.