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P0332 2017 GMC Sierra Code - Knock Sensor Circuit Low Voltage Bank 2

Quick Answer

The P0332 diagnostic trouble code (DTC) for a 2017 GMC Sierra indicates a Knock Sensor Circuit Low Voltage Bank 2 issue. Common causes include Faulty Knock Sensor: The most common cause of a P0332 code is a defective knock sensor in Bank 2, Wiring Issues: Damaged or corroded wiring connecting the knock sensor to the ECM can also trigger this code, Poor Electrical Connections: Loose or poor electrical connections at the knock sensor or ECM can lead to low voltage readings. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

What it means
P0332 2017 GMC Sierra indicates Knock Sensor Circuit Low Voltage Bank 2.
Common causes
Common causes include Faulty Knock Sensor: The most common cause of a P0332 code is a defective knock sensor in Bank 2, Wiring Issues: Damaged or corroded wiring connecting the knock sensor to the ECM can also trigger this code, Poor Electrical Connections: Loose or poor electrical connections at the knock sensor or ECM can lead to low voltage readings.
Severity
Moderate - service should be scheduled soon.
Can I drive?
The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
What is this?
Table of contents Created and updated by William Orellana on Sep 13, 2024
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Code P0332 2017 GMC Sierra Description

The P0332 diagnostic trouble code (DTC) for a 2017 GMC Sierra indicates a Knock Sensor Circuit Low Voltage Bank 2 issue. The knock sensor is a crucial component in the engine management system that detects abnormal combustion, often referred to as engine knock or detonation. When the knock sensor detects these irregularities, it sends a signal to the engine control module (ECM) to adjust the ignition timing to prevent engine damage.

OBDII Code P0332 2017 GMC Sierra - Knock Sensor Circuit Low Voltage Bank 2
P0332 2017 GMC Sierra Code - Knock Sensor Circuit Low Voltage Bank 2

Common Causes of P0332 2017 GMC Sierra

  1. Faulty Knock Sensor: The most common cause of a P0332 code is a defective knock sensor in Bank 2.
  2. Wiring Issues: Damaged or corroded wiring connecting the knock sensor to the ECM can also trigger this code.
  3. Poor Electrical Connections: Loose or poor electrical connections at the knock sensor or ECM can lead to low voltage readings.
  4. Engine Mechanical Problems: Issues such as excessive carbon buildup, incorrect ignition timing, or engine overheating can affect the knock sensor's performance.
  5. ECM Malfunction: A malfunctioning engine control module (ECM) can misinterpret the knock sensor signals, leading to a P0332 code.

Symptoms of P0332 2017 GMC Sierra

  1. Check Engine Light: The most common symptom associated with a P0332 code is the illumination of the check engine light on the vehicle's dashboard.
  2. Reduced Engine Performance: A malfunctioning knock sensor can lead to decreased engine performance, including sluggish acceleration and reduced power output.
  3. Rough Idling: The engine may experience rough idling or shaking when the knock sensor is not functioning correctly.
  4. Poor Fuel Efficiency: A faulty knock sensor can cause the engine to run inefficiently, leading to decreased fuel economy.
  5. Engine Knocking Sounds: In severe cases, a malfunctioning knock sensor may result in audible knocking or pinging sounds coming from the engine.

How to Fix P0332 2017 GMC Sierra

  1. Diagnose the Issue: Use a diagnostic scanner to retrieve the trouble codes and perform a thorough inspection of the knock sensor, wiring, and connections.
  2. Replace Knock Sensor: If the knock sensor is found to be faulty, it will need to be replaced with a new one compatible with the vehicle's make and model.
  3. Repair Wiring or Connections: Address any damaged or corroded wiring and ensure that all electrical connections are secure and free of debris.
  4. Clear Codes: After completing the repair, clear the trouble codes from the ECM's memory using a diagnostic scanner to reset the check engine light.
  5. Test Drive: Take the vehicle for a test drive to ensure that the issue has been resolved and that the engine is running smoothly without any abnormal symptoms.

Cost to Fix P0332 2017 GMC Sierra

The cost of repairing a P0332 code on a 2017 GMC Sierra can vary depending on the specific cause of the issue and the labor rates in your area. Typically, the cost of replacing a knock sensor ranges from $150 to $300, including parts and labor. However, additional costs may apply if wiring repairs or ECM diagnostics are necessary.

What does this mean?

Tech Notes for P0332 2017 GMC Sierra

The P0332 code means that the Knock Sensor is not working properly. Problems with the knock sensor will not cause engine performance problems. Replacing the knock sensor usually takes care of the problem.

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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 P0332 2017 GMC Sierra Code

What does the OBDII code P0332 mean for a 2017 GMC Sierra?

P0332 indicates a low voltage issue in the knock sensor circuit for Bank 2, which monitors engine vibrations for pre-detonation or "knocking."

What are common symptoms of the P0332 code in a 2017 GMC Sierra?

Symptoms may include reduced engine performance, poor fuel economy, unusual engine noises, or the Check Engine Light being illuminated.

What causes the P0332 code in a 2017 GMC Sierra?

Common causes include a faulty knock sensor, damaged wiring or connectors, corrosion, or an issue with the ECM.

Can driving with a P0332 code cause damage to my GMC Sierra?

Yes, prolonged driving with this code may result in engine damage due to unmonitored knocking or pre-detonation.

How do I troubleshoot the P0332 code in a 2017 GMC Sierra?

Inspect the knock sensor wiring and connectors for damage or corrosion, test the knock sensor for proper function, and check the ECM for faults.

Where is the knock sensor for Bank 2 located in a 2017 GMC Sierra?

The knock sensor for Bank 2 is typically located on or near the engine block on the side corresponding to cylinders 2, 4, 6, and 8.

How do I fix the P0332 code in my 2017 GMC Sierra?

Repairs may include replacing the knock sensor, repairing damaged wiring or connectors, or updating the ECM software if necessary.

How much does it cost to repair the P0332 code in a 2017 GMC Sierra?

Repair costs vary, but replacing a knock sensor typically costs between $150 and $400, including parts and labor.

Can the P0332 code be caused by bad fuel?

Yes, using low-quality or incorrect octane fuel can contribute to knock sensor issues, but it is not the most common cause.

Will clearing the P0332 code fix the problem in my GMC Sierra?

Clearing the code may temporarily turn off the Check Engine Light, but the underlying issue must be repaired to prevent the code from returning.

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