P0328 2014 Chevrolet Silverado Code - Knock Sensor Circuit High Voltage Bank 1
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 1, Knock Sensor Bank 1 circuit poor electrical connection, Knock Sensor Bank 1 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
- P0328 2014 Chevrolet Silverado indicates Knock Sensor Circuit High Voltage Bank 1.
- Common causes
- Common causes include Faulty Knock Sensor Bank 1, Knock Sensor Bank 1 circuit poor electrical connection, Knock Sensor Bank 1 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.
Code P0328 2014 Chevrolet Silverado 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 the Knock Sensor Bank 1 is short to voltage for greater than 5s.
What are the Possible Causes of the DTC P0328 2014 Chevrolet Silverado?
- Faulty Knock Sensor Bank 1
- Knock Sensor Bank 1 circuit poor electrical connection
- Knock Sensor Bank 1 harness is open or shorted
- Faulty Engine Control Module (ECM)
How to Fix the DTC P0328 2014 Chevrolet Silverado?
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 P0328 2014 Chevrolet Silverado 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 P0328 2014 Chevrolet Silverado Code
1. What does the OBDII code P0328 mean on a 2014 Chevrolet Silverado?
P0328 indicates a "Knock Sensor Circuit High Voltage Bank 1," meaning the knock sensor on Bank 1 is detecting a higher voltage than expected.
2. What are the common symptoms of code P0328 in a 2014 Chevrolet Silverado?
Symptoms may include engine pinging or knocking sounds, reduced engine performance, poor fuel economy, and the Check Engine Light illuminating.
3. What causes the P0328 code to appear in a 2014 Chevrolet Silverado?
Common causes include a faulty knock sensor, damaged sensor wiring, poor electrical connections, or an issue with the vehicle's ECM.
4. Can I drive my 2014 Chevrolet Silverado with the P0328 code active?
While it may still be drivable, ignoring this code can lead to engine damage due to improper timing adjustments, so it’s best to address the issue promptly.
5. How do I fix the P0328 code on a 2014 Chevrolet Silverado?
Repairs may involve replacing the knock sensor, repairing or replacing damaged wiring, cleaning corroded connections, or reprogramming the ECM if necessary.
6. Where is the knock sensor located in a 2014 Chevrolet Silverado?
The knock sensor for Bank 1 is typically located on the engine block, cylinder head, or intake manifold on the side of the engine with cylinder 1.
7. How much does it cost to repair the P0328 code on a 2014 Chevrolet Silverado?
Repair costs vary but typically range from $150 to $400, depending on whether the sensor, wiring, or ECM requires attention.
8. Can a bad knock sensor cause long-term damage to my 2014 Chevrolet Silverado?
Yes, if not addressed, a faulty knock sensor can lead to improper ignition timing, engine knocking, and potential engine damage over time.
9. What diagnostic steps should I take for the P0328 code on a 2014 Chevrolet Silverado?
Inspect the knock sensor and wiring for damage, check for loose or corroded connections, and use a multimeter to test the sensor's voltage output.
10. Can a P0328 code be triggered by bad fuel in a 2014 Chevrolet Silverado?
While uncommon, poor-quality or incorrect-octane fuel may contribute to engine knocking, which could indirectly trigger the knock sensor to detect abnormal activity.
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