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P0328 2003 Infiniti G35 Code - Knock Sensor Circuit High Input- Bank 1

Quick Answer

The P0328 diagnostic trouble code (DTC) for a 2003 Infiniti G35 indicates a Knock Sensor Circuit High Input in Bank 1. Common causes include Faulty knock sensor in Bank 1, Wiring issues, such as a short or open circuit in the knock sensor circuit, Corrosion or poor connections in the knock sensor wiring harness. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

What it means
P0328 2003 Infiniti G35 indicates Knock Sensor Circuit High Input- Bank 1.
Common causes
Common causes include Faulty knock sensor in Bank 1, Wiring issues, such as a short or open circuit in the knock sensor circuit, Corrosion or poor connections in the knock sensor wiring harness.
Severity
Low - monitor the vehicle and repair when practical.
Can I drive?
The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.
What is this?
Table of contents Created and updated by William Orellana on Sep 14, 2024
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Code P0328 2003 Infiniti G35 Description

The P0328 diagnostic trouble code (DTC) for a 2003 Infiniti G35 indicates a Knock Sensor Circuit High Input in Bank 1. The knock sensor is a crucial component in the engine management system that detects abnormal combustion, often referred to as engine knocking or pinging. When the knock sensor detects these abnormal vibrations, it sends a signal to the engine control module (ECM) to adjust the ignition timing to prevent engine damage and optimize performance.

OBDII Code P0328 2003 Infiniti G35 - Knock Sensor Circuit High Input- Bank 1
P0328 2003 Infiniti G35 Code - Knock Sensor Circuit High Input- Bank 1

Common Causes of P0328 2003 Infiniti G35

  1. Faulty knock sensor in Bank 1.
  2. Wiring issues, such as a short or open circuit in the knock sensor circuit.
  3. Corrosion or poor connections in the knock sensor wiring harness.
  4. Engine mechanical issues causing abnormal vibrations that trigger false knock sensor readings.
  5. ECM software or hardware issues affecting the interpretation of knock sensor signals.

Symptoms of P0328 2003 Infiniti G35

  1. Decreased engine performance, including reduced acceleration and power.
  2. Poor fuel economy, with increased fuel consumption.
  3. Illumination of the Check Engine Light on the dashboard.
  4. Engine misfires or rough idling.
  5. Vehicle entering fail-safe mode, limiting engine power.

How to Fix P0328 2003 Infiniti G35

  1. Begin by diagnosing the specific cause of the P0328 code using a scan tool to monitor knock sensor data and inspecting the wiring harness for any visible damage.
  2. If the knock sensor is determined to be faulty, it will need to be replaced. Accessing the knock sensor may require removing other components, such as intake manifolds or engine covers.
  3. Inspect the wiring harness for any signs of damage or corrosion. Repair or replace any damaged wiring as necessary.
  4. Clear the DTC from the ECM using a scan tool after completing the repairs.
  5. Test drive the vehicle to ensure the issue has been resolved and the Check Engine Light does not reappear.

Cost to Fix P0328 2003 Infiniti G35

The typical repair costs for addressing a P0328 code in a 2003 Infiniti G35 can range from $200 to $500, including parts and labor. The cost of a new knock sensor itself can vary depending on the brand and quality, typically ranging from $50 to $150. Labor costs can vary based on the shop's hourly rates and the complexity of accessing and replacing the knock sensor. It is advisable to consult with local auto repair shops for a more accurate estimate based on your specific location and vehicle.

What does this mean?

Tech Notes for P0328 2003 Infiniti G35

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.

When is the Code Detected?

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

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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 2003 Infiniti G35 Code

1. What does the OBDII code P0328 mean on a 2003 Infiniti G35?

P0328 indicates a "Knock Sensor Circuit High Input - Bank 1," meaning the knock sensor is detecting an abnormally high voltage signal, often caused by a malfunction in the sensor or its circuit.

2. What are the symptoms of code P0328 on a 2003 Infiniti G35?

Common symptoms include reduced engine performance, poor fuel economy, potential engine knocking, and an illuminated Check Engine Light.

3. What causes the P0328 code on a 2003 Infiniti G35?

Causes can include a faulty knock sensor, damaged wiring or connectors, a short or open circuit, or a malfunctioning engine control module (ECM).

4. Can I drive my 2003 Infiniti G35 with a P0328 code?

While the car may still be drivable, prolonged operation with this code can lead to engine damage or reduced performance, so it’s best to address the issue promptly.

5. How do I fix the P0328 code on a 2003 Infiniti G35?

Repairs typically involve replacing the knock sensor, repairing damaged wiring or connectors, and ensuring proper grounding of the circuit.

6. Where is the knock sensor located on a 2003 Infiniti G35?

The knock sensor is typically located in the engine valley, beneath the intake manifold, on the engine block.

7. How much does it cost to fix the P0328 code on a 2003 Infiniti G35?

Replacing the knock sensor can cost between $300 and $600, including parts and labor, depending on the shop and location.

8. Can a bad knock sensor cause engine damage?

Yes, if the knock sensor fails, the engine may not detect knock properly, leading to potential pre-ignition or detonation, which can damage internal components over time.

9. Can a loose or corroded connector cause the P0328 code?

Yes, a loose or corroded knock sensor connector can disrupt the circuit and trigger the P0328 code.

10. Does clearing the P0328 code fix the problem on a 2003 Infiniti G35?

Clearing the code will turn off the Check Engine Light temporarily, but the underlying issue must be fixed to prevent the code from returning.

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