AutoCodes – Chevrolet – P0330 Chevrolet

P0330 Chevrolet Code - Knock Sensor Circuit 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 Bank 2, Knock Sensor Bank 2 circuit poor electrical connection, Knock Sensor Bank 2 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: P0330 Chevrolet indicates Knock Sensor Circuit Bank 2.
Common causes: Common causes include Faulty Knock Sensor Bank 2, Knock Sensor Bank 2 circuit poor electrical connection, Knock Sensor Bank 2 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.

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Code Popularity 1,592

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0330 Chevrolet 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 the signal circuit from the Knock Sensor Bank 1 is open for greater than 5s.

OBDII Code P0330 Chevrolet - Knock Sensor Circuit Bank 2 - AutoCodes.com — P0330 Chevrolet Code - Knock Sensor Circuit Bank 2

What does this mean?

What are the Possible Causes of the DTC P0330 Chevrolet?

Faulty Knock Sensor Bank 2
Knock Sensor Bank 2 circuit poor electrical connection
Knock Sensor Bank 2 harness is open or shorted
Faulty Engine Control Module (ECM)

How to Fix the DTC P0330 Chevrolet?

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 P0330 Chevrolet 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 P0330 Chevrolet code?

Need more information on how to fix the P0330 Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

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Information for Specific Chevrolet Models

P0330 2014 Chevrolet Silverado — Knock Sensor Circuit Bank 2
P0330 2015 Chevrolet Silverado — Knock Sensor Circuit Bank 2
P0330 2016 Chevrolet Silverado — Knock Sensor Circuit Bank 2
P0330 2017 Chevrolet Silverado — Knock Sensor Circuit Bank 2
P0330 2018 Chevrolet Silverado — Knock Sensor Circuit Bank 2

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 P0330 Chevrolet Code

1. What are the common symptoms of OBDII code P0330 in a Chevrolet related to the Knock Sensor Circuit Bank 2?

- Common symptoms include engine knocking noises, reduced engine performance, and a possible decrease in fuel efficiency.

2. What are the potential causes of the P0330 code in a Chevrolet indicating an issue with Knock Sensor Circuit Bank 2?

- Possible causes can include a faulty knock sensor, damaged wiring or connectors in the circuit, or issues with the engine control module (ECM).

3. How can I diagnose the P0330 code on a Chevrolet related to Knock Sensor Circuit Bank 2?

- Diagnosis typically involves using a scan tool to read the code, inspecting the knock sensor and its wiring, and testing the sensor's resistance and voltage.

4. Can a malfunctioning knock sensor cause other problems in a Chevrolet vehicle?

- Yes, a malfunctioning knock sensor can lead to decreased engine performance, increased emissions, and potential damage to the engine over time.

5. Are there any repair tips for addressing the P0330 code in a Chevrolet with a Knock Sensor Circuit Bank 2 issue?

- Repair tips may include replacing the knock sensor, inspecting and repairing any damaged wiring, and ensuring proper connection to the ECM.

6. Is it safe to continue driving a Chevrolet with the P0330 code related to Knock Sensor Circuit Bank 2?

- It is generally not recommended to drive with a faulty knock sensor as it can lead to engine damage and potential safety hazards.

7. Can weather or environmental factors affect the performance of the knock sensor in a Chevrolet?

- Extreme temperatures, humidity, or exposure to water can potentially affect the operation of the knock sensor and trigger the P0330 code.

8. How much does it typically cost to repair the P0330 code related to Knock Sensor Circuit Bank 2 in a Chevrolet?

- Repair costs can vary depending on the exact cause of the issue, but it may range from $150 to $400 for parts and labor.

9. Will resetting the OBDII system clear the P0330 code temporarily in a Chevrolet?

- Resetting the OBDII system may temporarily clear the code, but if the underlying issue with the knock sensor persists, the code is likely to reappear.

10. Can I replace the knock sensor in a Chevrolet with P0330 code related to Knock Sensor Circuit Bank 2 myself?

- While it is possible to replace the knock sensor yourself, it is recommended to have the necessary tools and knowledge to ensure proper installation and avoid further issues.