AutoCodes – Mercedes-Benz – P0328 Mercedes-Benz

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

Quick Answer

This fault code is stored in the Engine Control Module (ECM) when a combustion anomaly is detected. Common causes include Faulty Knock Sensor, Knock Sensor harness is open or shorted, Knock Sensor circuit poor electrical connection. 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, Knock Sensor harness is open or shorted, Knock Sensor circuit poor electrical connection.
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.

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Code Popularity 6,060

How popular is this code, among other codes? Low

Repair Importance Level

Moderate (Service soon) (2 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Sep 15, 2019

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0328 Mercedes-Benz Description

This fault code is stored in the Engine Control Module (ECM) when a combustion anomaly is detected. When irregular combustion takes place a detectable knock or vibration occurs. This acts on the knock sensor and causes a voltage to be generated by the component. The ECM then uses the output from the camshaft position sensor to calculate the knock window for a given ignition event. The knock window is the angular period, in crankshaft rotation, when combustion knock can occur. If the knock sensor produces a voltage outside of the knock window, the signal will be ignored. For correct operation of the knock sensor, the component must be torqued to the correct tightness and the retaining bolt must be replaced after it has been removed. The engine lubrication system should also be inspected as a fault here could result in false knock sensor codes being generated.

OBDII Code P0328 Mercedes-Benz - Knock/Combustion Vibration Sensor 1 Circuit High Bank 1 - AutoCodes.com — P0328 Mercedes-Benz Code - Knock/Combustion Vibration Sensor 1 Circuit High Bank 1

What does this mean?

What are the Possible Causes of the DTC P0328 Mercedes-Benz?

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

How to Fix the DTC P0328 Mercedes-Benz?

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 does this mean?

Code Tech Notes

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.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0328 Mercedes-Benz 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 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.