P0332 2018 GMC Sierra Code - Knock Sensor Circuit Low Voltage Bank 2
Quick Answer
The P0332 diagnostic trouble code (DTC) for a 2018 GMC Sierra indicates a problem with the Knock Sensor Circuit Low Voltage Bank 2. Common causes include Faulty Knock Sensor: The most common cause of a P0332 code is a malfunctioning knock sensor itself, Wiring Issues: Damage to the wiring harness connecting the knock sensor to the ECM can lead to low voltage readings, Poor Ground Connection: A poor ground connection for the knock sensor can also result in 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 2018 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 malfunctioning knock sensor itself, Wiring Issues: Damage to the wiring harness connecting the knock sensor to the ECM can lead to low voltage readings, Poor Ground Connection: A poor ground connection for the knock sensor can also result in 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code P0332 2018 GMC Sierra Description
The P0332 diagnostic trouble code (DTC) for a 2018 GMC Sierra indicates a problem with the Knock Sensor Circuit Low Voltage Bank 2. The knock sensor is a crucial component of the engine management system that detects abnormal combustion, often referred to as engine knocking or pinging. When the knock sensor detects these abnormal combustion events, it sends a signal to the engine control module (ECM) to adjust the ignition timing to prevent engine damage.
Common Causes of P0332 2018 GMC Sierra
- Faulty Knock Sensor: The most common cause of a P0332 code is a malfunctioning knock sensor itself.
- Wiring Issues: Damage to the wiring harness connecting the knock sensor to the ECM can lead to low voltage readings.
- Poor Ground Connection: A poor ground connection for the knock sensor can also result in low voltage readings.
- ECM Malfunction: In rare cases, a malfunction in the engine control module (ECM) can cause erroneous readings from the knock sensor.
- Engine Mechanical Issues: Problems such as excessive carbon buildup, engine overheating, or internal engine damage can also trigger a P0332 code.
Symptoms of P0332 2018 GMC Sierra
- 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.
- Engine Pinging or Knocking: If the knock sensor is not functioning properly, the engine may experience abnormal combustion events, resulting in pinging or knocking sounds.
- Reduced Engine Performance: A malfunctioning knock sensor can lead to decreased engine power and overall performance.
- Poor Fuel Efficiency: Incorrect ignition timing due to a faulty knock sensor can result in decreased fuel efficiency.
- Engine Misfires: In some cases, a malfunctioning knock sensor can cause engine misfires, leading to rough idling or hesitation during acceleration.
How to Fix P0332 2018 GMC Sierra
- Diagnose the Issue: Use a scan tool to retrieve the specific DTC and verify the knock sensor's low voltage reading in Bank 2.
- Inspect Wiring and Connections: Check the wiring harness for any damage or corrosion, and ensure that the connections to the knock sensor and ECM are secure.
- Test Knock Sensor: Test the knock sensor using a multimeter to determine if it is functioning correctly.
- Replace Knock Sensor: If the knock sensor is faulty, replace it with a new, OEM-quality sensor.
- Clear Codes and Test Drive: After completing the repair, clear the DTC from the ECM memory and test drive the vehicle to ensure the issue has been resolved.
Cost to Fix P0332 2018 GMC Sierra
The cost of repairing a P0332 code on a 2018 GMC Sierra can vary depending on the specific cause of the issue. In general, the cost of a new knock sensor can range from $50 to $150, depending on the brand and quality. Labor costs for this repair can range from $100 to $300, depending on the shop's hourly rates and the complexity of the repair. Overall, the total cost of resolving a P0332 code could range from $150 to $450, including parts and labor. It's important to note that these are rough estimates, and actual costs may vary based on the location, vehicle make and model, and other factors. It's advisable to consult with a qualified mechanic or auto repair shop for a more accurate cost estimate.
Tech Notes for P0332 2018 GMC Sierra
Need more information about the P0332 2018 GMC Sierra code?
Need more information on how to fix the P0332 2018 GMC Sierra code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P0332 2018 GMC Sierra code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P0332 2018 GMC Sierra Code
No Frequently Asked Questions about P0332 2018 GMC Sierra Code found.
Discuss the causes and fixes for P0332 2018 GMC Sierra OBDII Code
Code P0332 2018 GMC Sierra comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.