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P0328 Mercedes-Benz Code - Knock/Combustion Vibration Sensor 1 Circuit High Bank 1

Quick Answer

The P0328 diagnostic trouble code (DTC) for Mercedes-Benz vehicles specifically relates to the Knock/Combustion Vibration Sensor 1 Circuit High Bank 1. Common causes include Faulty knock sensor, Wiring harness issues, Engine mechanical problems. 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
P0328 Mercedes-Benz indicates Knock/Combustion Vibration Sensor 1 Circuit High Bank 1.
Common causes
Common causes include Faulty knock sensor, Wiring harness issues, Engine mechanical problems.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 12, 2024
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Code P0328 Mercedes-Benz Description

The P0328 diagnostic trouble code (DTC) for Mercedes-Benz vehicles specifically relates to the Knock/Combustion Vibration Sensor 1 Circuit High Bank 1. This code indicates that there is a high voltage condition detected in the circuit for the knock sensor located in Bank 1 of the engine. The knock sensor is a crucial component in the engine control system as it detects abnormal combustion in the cylinders, commonly referred to as engine knock or detonation. When abnormal combustion is detected, the engine control module (ECM) adjusts the ignition timing to prevent engine damage and optimize performance.

OBDII Code P0328 Mercedes-Benz - Knock/Combustion Vibration Sensor 1 Circuit High Bank 1
P0328 Mercedes-Benz Code - Knock/Combustion Vibration Sensor 1 Circuit High Bank 1

Common Causes of P0328 Mercedes-Benz

  1. Faulty knock sensor
  2. Wiring harness issues
  3. Engine mechanical problems
  4. ECM malfunction
  5. Poor quality fuel or incorrect fuel octane rating

Symptoms of P0328 Mercedes-Benz

  1. Engine knocking or pinging noises
  2. Decreased fuel efficiency
  3. Loss of engine power
  4. Illuminated check engine light
  5. Rough idling or misfires

How to Fix P0328 Mercedes-Benz

  1. Diagnose the knock sensor circuit using a scan tool to pinpoint the exact issue.
  2. Inspect the knock sensor and wiring for any visible damage or wear.
  3. Replace the knock sensor if it is found to be faulty.
  4. Repair or replace any damaged wiring or connectors in the circuit.
  5. Clear the DTC and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P0328 Mercedes-Benz

The typical repair costs for addressing a P0328 code on a Mercedes-Benz vehicle can range from $150 to $400, depending on the specific cause of the issue and the labor rates in your area. Parts such as a new knock sensor may cost between $50 and $150, while labor charges can vary between $80 and $150 per hour. It's recommended to consult with a qualified mechanic or repair shop to get an accurate estimate based on your vehicle's make and model, as well as any additional factors that may affect the repair process.

What does this mean?

Tech Notes for P0328 Mercedes-Benz

Mercedes Benz Code = 0501 (knock sensor 1, right) has a short circuit to positive. (P0328)



The P0328 code means that the Knock Sensor is not working correctly. Problems with the knock sensor will not cause engine performance problems. Replacing the knock sensor usually takes care of the problem.

When is the Code Detected?

An excessively high voltage from the Knock Sensor is sent to Electronic Control Module (ECM)

Need more information about the P0328 Mercedes-Benz code?

Need more information on how to fix the P0328 Mercedes-Benz code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0328 Mercedes-Benz code diagnosed by a professional: Find a repair shop in your area

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 P0328 Mercedes-Benz Code

1. What are the common symptoms of OBDII code P0328 in a Mercedes-Benz related to the Knock/Combustion Vibration Sensor 1 Circuit High Bank 1?

The common symptoms include engine knocking or pinging noises, decreased fuel efficiency, and potential rough idling.

2. What are the possible causes of OBDII code P0328 in a Mercedes-Benz?

The code P0328 may be triggered by a faulty knock sensor, issues with the sensor wiring or connectors, or problems with the engine control module (ECM).

3. How can a faulty Knock/Combustion Vibration Sensor 1 Circuit High Bank 1 impact the performance of a Mercedes-Benz?

A malfunctioning knock sensor can lead to poor engine performance, reduced power output, and potential damage to the engine due to pre-ignition or detonation.

4. What steps can be taken to diagnose the root cause of OBDII code P0328 in a Mercedes-Benz?

Diagnosis typically involves inspecting the knock sensor and its wiring for damage, testing sensor functionality, and checking the ECM for any related faults.

5. Can driving with a persistent P0328 code in a Mercedes-Benz cause further damage?

Continued driving with a P0328 code may lead to decreased engine efficiency, potential damage to internal engine components, and increased risk of engine knocking or misfiring.

6. How can a Mercedes-Benz owner repair OBDII code P0328 related to the Knock/Combustion Vibration Sensor 1 Circuit High Bank 1?

Repair options may include replacing the knock sensor, repairing damaged wiring or connectors, and resetting the fault code with a diagnostic tool.

7. Are there any preventative measures Mercedes-Benz owners can take to avoid encountering code P0328?

Regular maintenance, such as timely oil changes and using high-quality fuel, can help prevent issues that may trigger the P0328 code related to knock sensor performance.

8. Can a Mercedes-Benz continue to be driven with a stored P0328 code if the symptoms are not severe?

While it may be possible to continue driving the vehicle with a stored P0328 code, it is recommended to address the underlying issue promptly to prevent potential engine damage.

9. Can a DIY enthusiast with automotive experience repair OBDII code P0328 in a Mercedes-Benz at home?

Replacing the knock sensor or repairing wiring may be feasible for experienced DIY enthusiasts, but accurately diagnosing the issue and resetting the fault code may require professional tools and expertise.

10. How long does it typically take for a mechanic to diagnose and repair OBDII code P0328 in a Mercedes-Benz?

The time required for diagnosis and repair can vary based on the specific issue, but it may take a few hours to a day for a mechanic to properly diagnose and address the P0328 code in a Mercedes-Benz.

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