AutoCodes – Lexus – P0328 Lexus

P0328 Lexus Code - Knock Sensor 1 Circuit High Input

Quick Answer

A flat-type knock control sensor (non-resonant type) has a structure that can detect vibrations between approximately 5 kHz and 15 kHz. Common causes include Faulty Knock Sensor, Knock Sensor circuit poor electrical connection, Knock Sensor harness is open or shorted. 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 Lexus indicates Knock Sensor 1 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: 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.

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Code Popularity 21,610

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Aug 25, 2022

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

A flat-type knock control sensor (non-resonant type) has a structure that can detect vibrations between approximately 5 kHz and 15 kHz. The knock control sensor is fitted onto the engine block to detect engine knocking. The knock control sensor contains a piezoelectric element that generates a voltage when it becomes deformed. The voltage is generated when the engine block vibrates due to knocking. Any occurrence of engine knocking can be suppressed by delaying the ignition timing.
If the output voltage transmitted by the knock control sensor remains low or high for 1 second or more, the Engine Control Module (ECM) interprets this as a malfunction in the sensor circuit and stores a Diagnostic Trouble Code (DTC).

OBDII Code P0328 Lexus - Knock Sensor 1 Circuit High Input - AutoCodes.com — P0328 Lexus Code - Knock Sensor 1 Circuit High Input

What does this mean?

What are the Possible Causes of the DTC P0328 Lexus?

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 Lexus?

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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0328 Lexus 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.

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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 Lexus Code

1. What are the common symptoms of OBDII code P0328 in a Lexus related to Knock Sensor 1 Circuit High Input?

- Common symptoms include engine pinging or knocking noises, reduced engine performance, and illuminated check engine light.

2. What are the possible causes of OBDII code P0328 in a Lexus indicating Knock Sensor 1 Circuit High Input?

- Possible causes include a faulty knock sensor, damaged wiring or connectors, engine overheating, or issues with the engine control module.

3. How can I diagnose OBDII code P0328 in a Lexus for Knock Sensor 1 Circuit High Input?

- Diagnosis typically involves inspecting the knock sensor and its wiring, checking for any visible damage, and using a multimeter to test the sensor's resistance.

4. What are some tips for repairing OBDII code P0328 in a Lexus related to Knock Sensor 1 Circuit High Input?

- Repair tips include replacing the knock sensor if faulty, repairing any damaged wiring or connectors, ensuring proper sensor installation, and clearing the trouble code.

5. Can I drive my Lexus with OBDII code P0328 for Knock Sensor 1 Circuit High Input?

- It is not recommended to drive with this code as it can lead to reduced engine performance and potential long-term damage if left unresolved.

6. How important is the knock sensor in a Lexus and why does it trigger the P0328 code?

- The knock sensor is crucial for detecting abnormal engine noises and preventing engine damage. When it malfunctions or indicates a high input, it triggers the P0328 code to alert you of a potential issue.

7. Is it necessary to reset the ECU after repairing OBDII code P0328 for Knock Sensor 1 Circuit High Input in a Lexus?

- It is advisable to reset the ECU or clear the trouble codes after repairing P0328 to ensure the system recognizes the repairs and to reevaluate if the issue persists.

8. Are there any preventive measures to avoid OBDII code P0328 in a Lexus related to Knock Sensor 1 Circuit High Input?

- Regular maintenance, timely engine tune-ups, and monitoring engine performance can help prevent issues that may trigger the P0328 code.

9. Can extreme weather conditions or rough driving cause OBDII code P0328 in a Lexus for Knock Sensor 1 Circuit High Input?

- Yes, extreme temperatures, rough driving conditions, or engine overheating can potentially damage the knock sensor or its wiring, leading to the P0328 code.

10. How long does it typically take to repair OBDII code P0328 for Knock Sensor 1 Circuit High Input in a Lexus?

- The repair time can vary depending on the extent of the issue and the availability of parts, but it generally takes a few hours to diagnose and fix the problem.