AutoCodes – Mazda – P0328 Mazda

P0328 Mazda Code - Knock Sensor circuit high input

Quick Answer

The knock sensor is attached to the cylinder block. Common causes include Faulty knock sensor, Knock sensor circuit poor electrical connection, Knock sensor harness is open or shorted. 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 Mazda indicates Knock Sensor circuit high input.
Common causes: Common causes include Faulty knock sensor, Knock sensor circuit poor electrical connection, Knock sensor harness is open or shorted.
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 68,040

How popular is this code, among other codes? Medium

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 Jun 14, 2020

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

The knock sensor is attached to the cylinder block. It senses engine knocking using a piezoelectric element. A knocking vibration from the cylinder block is sensed as vibrational pressure. This pressure is converted into a voltage signal and sent to the Engine Control Module (ECM).

OBDII Code P0328 Mazda - Knock Sensor circuit high input - AutoCodes.com — P0328 Mazda Code - Knock Sensor circuit high input

What does this mean?

What are the Possible Causes of the DTC P0328 Mazda?

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

How to Fix the DTC P0328 Mazda?

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

The P0328 code means that the Knock Sensor is not working properly. Problems with the knock sensor will not cause an 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 Mazda 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 Mazda code?

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

Need Help with the Code?

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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 Mazda Code

1. What are the common symptoms of an OBDII code P0328 in a Mazda related to the Knock Sensor circuit high input?

- Common symptoms include engine knocking or pinging noises, decreased engine performance, and potential illumination of the check engine light.

2. What are the possible causes of an OBDII code P0328 in a Mazda?

- The code P0328 in a Mazda is often caused by a faulty knock sensor, damaged wiring or connectors in the knock sensor circuit, or issues with the engine control module (ECM).

3. How can I diagnose the OBDII code P0328 in my Mazda?

- Diagnosing the code P0328 involves using a scan tool to retrieve the fault code, checking the knock sensor and its wiring for any damage, and testing the sensor's resistance and voltage.

4. Can I drive my Mazda with an OBDII code P0328?

- It is not recommended to drive your Mazda with an active code P0328, as it can lead to engine damage due to potential knock sensor malfunctions and abnormal engine timing.

5. Is it safe to continue driving if the check engine light is on due to the OBDII code P0328 in my Mazda?

- It is best to avoid driving your Mazda when the check engine light is on, as the underlying issue causing the code P0328 may worsen and lead to more significant engine problems.

6. What are some repair tips for fixing an OBDII code P0328 in a Mazda?

- Repair tips include inspecting and replacing the knock sensor if necessary, repairing any damaged wiring or connectors, and resetting the ECM after the issue has been resolved.

7. Can a DIY enthusiast fix an OBDII code P0328 in a Mazda?

- While some aspects of diagnosing and repairing the code P0328 can be done by a DIY enthusiast, it is recommended to seek professional help for accurate diagnosis and proper repair to avoid further complications.

8. How much does it typically cost to repair an OBDII code P0328 in a Mazda?

- The cost of repairing an OBDII code P0328 in a Mazda can vary depending on the extent of the issue, but it may range from around $150 to $500, including parts and labor.

9. What happens if I ignore an OBDII code P0328 in my Mazda?

- Ignoring the code P0328 can result in decreased engine performance, reduced fuel efficiency, engine knocking or pinging, and potential long-term damage to the engine if the underlying issue is not addressed promptly.

10. How can I prevent the recurrence of an OBDII code P0328 in my Mazda in the future?

- To prevent the recurrence of the code P0328, ensure regular maintenance of your Mazda, including timely sensor inspections, addressing any wiring issues promptly, and using high-quality fuel to prevent engine knocking.