P0331 2017 GMC Sierra Code - Knock Sensor Performance Bank 2
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 2 Bank 2, Knock Sensor 2 Bank 2 circuit poor electrical connection, Knock Sensor 2 Bank 2 harness is open or shorted. 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
- P0331 2017 GMC Sierra indicates Knock Sensor Performance Bank 2.
- Common causes
- Common causes include Faulty Knock Sensor 2 Bank 2, Knock Sensor 2 Bank 2 circuit poor electrical connection, Knock Sensor 2 Bank 2 harness is open or shorted.
- 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.
Code P0331 2017 GMC Sierra Description
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 the signal from Knock Sensor is low frequency.
What are the Possible Causes of the DTC P0331 2017 GMC Sierra?
- Faulty Knock Sensor 2 Bank 2
- Knock Sensor 2 Bank 2 circuit poor electrical connection
- Knock Sensor 2 Bank 2 harness is open or shorted
- Faulty Engine Control Module (ECM)
How to Fix the DTC P0331 2017 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.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0331 2017 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.
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Frequently Asked Questions about P0331 2017 GMC Sierra Code
What does code P0331 mean for a 2017 GMC Sierra?
Code P0331 indicates an issue with the knock sensor performance on Bank 2, which monitors engine vibrations to detect knock or detonation.
What are common symptoms of P0331 in a 2017 GMC Sierra?
Symptoms include reduced engine performance, poor fuel economy, possible engine misfires, and an illuminated check engine light.
What causes the P0331 code on a 2017 GMC Sierra?
Common causes include a faulty knock sensor, damaged wiring or connectors, excessive engine vibration, or incorrect fuel mixture.
Can you drive a 2017 GMC Sierra with the P0331 code?
Driving with P0331 is possible but not recommended, as it can lead to engine damage if knock or detonation is not properly detected.
How do you diagnose the P0331 code on a 2017 GMC Sierra?
Diagnosis involves using an OBDII scanner, inspecting the knock sensor and its wiring, checking for engine knock, and verifying the sensor's signal with a multimeter.
How do you fix the P0331 code on a 2017 GMC Sierra?
Repairs may include replacing the knock sensor, repairing damaged wiring or connectors, updating the PCM software, or addressing engine issues causing excessive vibration.
Where is the knock sensor located on a 2017 GMC Sierra?
The knock sensor for Bank 2 is typically located on the engine block or cylinder head on the side opposite Bank 1.
Can a bad knock sensor cause engine damage in a 2017 GMC Sierra?
Yes, a failing knock sensor can prevent the detection of engine knock, potentially leading to severe damage over time.
Is the P0331 code covered under warranty for a 2017 GMC Sierra?
Warranty coverage depends on the vehicle’s warranty terms and mileage. Check with your GMC dealer for specifics.
How much does it cost to repair a P0331 code on a 2017 GMC Sierra?
Repair costs vary but typically range from $150 to $400, depending on whether the knock sensor or wiring needs replacement.
Discuss the causes and fixes for P0331 2017 GMC Sierra OBDII Code
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