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Engine-Codes – Toyota – P0328 2007 Toyota Highlander

P0328 2007 Toyota Highlander Code - Knock Sensor 1 Circuit High Input

Quick Answer

The P0328 diagnostic trouble code (DTC) for a 2007 Toyota Highlander indicates a problem with the Knock Sensor 1 Circuit having a high input. Common causes include Faulty knock sensor, Damaged wiring or connectors in the knock sensor circuit, Corrosion or poor connections in the sensor circuit. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P0328 2007 Toyota Highlander indicates Knock Sensor 1 Circuit High Input.
Common causes
Common causes include Faulty knock sensor, Damaged wiring or connectors in the knock sensor circuit, Corrosion or poor connections in the sensor circuit.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Aug 30, 2024
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Code P0328 2007 Toyota Highlander Description

The P0328 diagnostic trouble code (DTC) for a 2007 Toyota Highlander indicates a problem with the Knock Sensor 1 Circuit having a high input. The knock sensor is a crucial component in the engine management system that detects abnormal combustion, often referred to as engine knock or detonation. When the knock sensor detects these abnormal combustion events, it sends a signal to the engine control module (ECM) to adjust the ignition timing to prevent engine damage.

OBDII Code P0328 2007 Toyota Highlander - Knock Sensor 1 Circuit High Input
P0328 2007 Toyota Highlander Code - Knock Sensor 1 Circuit High Input

Common Causes of P0328 2007 Toyota Highlander

  1. Faulty knock sensor
  2. Damaged wiring or connectors in the knock sensor circuit
  3. Corrosion or poor connections in the sensor circuit
  4. Issues with the ECM or engine control module
  5. Engine overheating leading to false knock sensor readings

Symptoms of P0328 2007 Toyota Highlander

  1. Engine misfires or rough idling
  2. Decreased fuel efficiency
  3. Loss of engine power
  4. Illumination of the Check Engine Light
  5. Engine knocking or pinging noises

How to Fix P0328 2007 Toyota Highlander

  1. Begin by diagnosing the specific cause of the high input signal, which may involve testing the knock sensor, checking the wiring harness, and verifying the ECM's functionality.
  2. Replace the knock sensor if it is found to be faulty or damaged.
  3. Repair or replace any damaged wiring or connectors in the knock sensor circuit.
  4. Clear the fault codes from the ECM and reset the system to see if the issue persists.
  5. Test drive the vehicle to ensure that the problem has been resolved and that the knock sensor is functioning properly.

Cost to Fix P0328 2007 Toyota Highlander

The typical repair costs for addressing a P0328 code in a 2007 Toyota Highlander can range from $200 to $500, including parts and labor. However, the actual cost may vary depending on the specific diagnosis time and labor rates at auto repair shops, which can range between $80 and $150 per hour. It is recommended to consult with a trusted mechanic or dealership to get an accurate estimate based on your location and vehicle's unique requirements.

What does this mean?

Tech Notes for P0328 2007 Toyota Highlander

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.

You maybe also consider replacing the knock sensor short harness to avoid future problems.
If you have a V6 Toyota Highlander, it is recommended you replace both knock sensors and short harness to avoid re-doing the labor since it is alot of work, since it is located under the intake manifold.

When is the Code Detected?

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

Need more information about the P0328 2007 Toyota Highlander 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 2007 Toyota Highlander Code

1. What are the common symptoms of OBDII code P0328 in a 2007 Toyota Highlander?

- Common symptoms include engine knocking noises, reduced engine performance, and the illumination of the Check Engine Light.

2. What does the OBDII code P0328 "Knock Sensor 1 Circuit High Input" mean for a 2007 Toyota Highlander?

- This code indicates that the engine control module (ECM) has detected a high input signal from the knock sensor 1 circuit.

3. What are some possible causes of the P0328 code in a 2007 Toyota Highlander?

- Potential causes include a faulty knock sensor, damaged wiring or connectors in the knock sensor circuit, or a problem with the ECM.

4. How can I diagnose the cause of the P0328 code in my 2007 Toyota Highlander?

- Diagnosing the issue typically involves testing the knock sensor, inspecting the wiring and connectors for damage, and checking the ECM for any faults.

5. Can I continue driving my 2007 Toyota Highlander with the P0328 code present?

- It is not recommended to drive the vehicle with the P0328 code as it can lead to engine damage and poor performance if left unresolved.

6. How can I repair the Knock Sensor 1 Circuit High Input issue in my 2007 Toyota Highlander?

- Repairing the issue may involve replacing the knock sensor, repairing or replacing damaged wiring or connectors, or reprogramming the ECM if necessary.

7. Are there any DIY tips for troubleshooting the P0328 code in a 2007 Toyota Highlander?

- DIY enthusiasts can start by visually inspecting the knock sensor and its wiring for any visible damage before proceeding with further diagnostic tests.

8. Can a faulty knock sensor cause other problems in my 2007 Toyota Highlander?

- Yes, a faulty knock sensor can lead to decreased fuel efficiency, engine misfires, and potential damage to the engine if not addressed promptly.

9. How much does it typically cost to repair the Knock Sensor 1 Circuit High Input issue in a 2007 Toyota Highlander?

- The cost of repair can vary depending on the exact cause of the issue, but it may range from $200 to $500 including parts and labor.

10. Is it possible to prevent the recurrence of the P0328 code in my 2007 Toyota Highlander?

- Regular maintenance, such as checking the knock sensor and its wiring during routine inspections, can help prevent the recurrence of the P0328 code.

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