P0328 Chevrolet 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 Chevrolet 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 Chevrolet 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 Chevrolet?
- 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 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 P0328 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.
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Information for Specific Chevrolet Models
- P0328 2014 Chevrolet Silverado — Knock Sensor Circuit High Voltage Bank 1
- P0328 2015 Chevrolet Silverado — Knock Sensor Circuit High Voltage Bank 1
- P0328 2016 Chevrolet Silverado — Knock Sensor Circuit High Voltage Bank 1
- P0328 2017 Chevrolet Silverado — Knock Sensor Circuit High Voltage Bank 1
- P0328 2018 Chevrolet Silverado — Knock Sensor Circuit High Voltage Bank 1
Frequently Asked Questions about P0328 Chevrolet Code
What does the OBDII code P0328 mean for a Chevrolet?
P0328 indicates that the knock sensor circuit on Bank 1 is detecting a voltage higher than the expected range.
What are the common symptoms of P0328 in a Chevrolet?
Symptoms may include engine knocking or pinging, reduced fuel efficiency, poor acceleration, and the Check Engine Light turning on.
What causes the P0328 code in a Chevrolet?
Common causes include a faulty knock sensor, damaged wiring or connectors in the knock sensor circuit, or an engine control module (ECM) issue.
How does the knock sensor affect engine performance?
The knock sensor detects engine detonation or knocking and sends signals to the ECM to adjust ignition timing, ensuring optimal engine performance.
Can you drive a Chevrolet with a P0328 code?
While the vehicle may still be drivable, it’s not recommended as prolonged engine knocking can damage internal components.
How can the P0328 code be diagnosed?
Diagnosis typically involves inspecting the knock sensor, checking wiring and connectors for damage, and testing the sensor voltage with a multimeter.
How do you fix a P0328 code on a Chevrolet?
Repairs may include replacing the knock sensor, repairing or replacing damaged wiring, or reprogramming or replacing the ECM if needed.
Where is the knock sensor located on most Chevrolet engines?
The knock sensor is typically mounted on the engine block, cylinder head, or intake manifold, depending on the specific Chevrolet model and engine.
How much does it cost to fix the P0328 code on a Chevrolet?
Repair costs can range from $150 to $400, depending on whether the sensor, wiring, or ECM needs replacement or repair.
Can a bad knock sensor cause engine damage in a Chevrolet?
Yes, if the sensor fails to detect knocking, the ECM may not adjust ignition timing properly, potentially leading to engine damage over time.
Discuss the causes and fixes for P0328 Chevrolet OBDII Code
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