AutoCodes – Isuzu – P0328 Isuzu

P0328 Isuzu Code - Knock Sensor 1 Circuit High Voltage

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 Isuzu indicates Knock Sensor 1 Circuit High Voltage.
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 4,454

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 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 Isuzu 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 Isuzu - Knock Sensor 1 Circuit High Voltage - AutoCodes.com — P0328 Isuzu Code - Knock Sensor 1 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P0328 Isuzu?

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 Isuzu?

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 Isuzu 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 Isuzu 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 Isuzu Code

1. What are the common symptoms of OBDII code P0328 Isuzu (Knock Sensor 1 Circuit High Voltage)?

- Common symptoms include poor engine performance, decreased fuel efficiency, and in some cases, engine knocking or pinging noise.

2. What are the typical causes of OBDII code P0328 Isuzu?

- The code is usually triggered by a faulty knock sensor, wiring issues in the knock sensor circuit, or a problem with the engine computer (ECU).

3. How can I diagnose the cause of OBDII code P0328 Isuzu?

- Diagnosing the issue may involve visually inspecting the knock sensor and its wiring, using a multimeter to test for continuity, and checking for any potential vacuum leaks.

4. Can I drive my vehicle with OBDII code P0328 Isuzu active?

- It is generally not recommended to drive with this code active as it can lead to potential engine damage and reduced performance over time.

5. How do I repair OBDII code P0328 Isuzu?

- Repairing the code may involve replacing the knock sensor, repairing any damaged wiring, or resetting the ECU after addressing the underlying issue.

6. Will resetting the OBDII code P0328 Isuzu resolve the problem?

- While resetting the code may temporarily turn off the Check Engine Light, it will not fix the underlying issue causing the high voltage in the knock sensor circuit.

7. Can a faulty knock sensor cause other codes to appear in addition to P0328 Isuzu?

- Yes, a malfunctioning knock sensor can sometimes trigger related codes such as P0330 (Knock Sensor 2 Circuit Malfunction) or P0332 (Knock Sensor 2 Circuit Low Input).

8. Are there any DIY tips for troubleshooting OBDII code P0328 Isuzu?

- DIY troubleshooting tips may include visually inspecting the sensor and its wiring, checking for loose connections, and testing the sensor's resistance with a multimeter.

9. How much does it typically cost to repair OBDII code P0328 Isuzu at a mechanic or dealership?

- The cost of repairing this code can vary depending on the extent of the issue, but it may range from $200 to $500 at a mechanic or dealership.

10. How long does it take to repair OBDII code P0328 Isuzu?

- The repair time can vary based on the specific cause of the code and the availability of parts, but it typically takes a few hours to a full day to diagnose and repair the issue.