AutoCodes – Subaru – P0333 Subaru

P0333 Subaru Code - Knock Sensor 2 Circuit High Input Bank 1 Or Single Sensor

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: P0333 Subaru indicates Knock Sensor 2 Circuit High Input Bank 1 Or Single Sensor.
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 15,274

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
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0333 Subaru 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 P0333 Subaru - Knock Sensor 2 Circuit High Input Bank 1 Or Single Sensor - AutoCodes.com — P0333 Subaru Code - Knock Sensor 2 Circuit High Input Bank 1 Or Single Sensor

What does this mean?

What are the Possible Causes of the DTC P0333 Subaru?

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 P0333 Subaru?

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 P0333 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 P0333 Subaru 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 P0333 Subaru code?

Need more information on how to fix the P0333 Subaru 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 P0333 Subaru Code

1. What are the common symptoms of OBDII code P0333 in a Subaru related to Knock Sensor 2 Circuit High Input Bank 1 or Single Sensor?

- 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 P0333 in a Subaru related to Knock Sensor 2 Circuit High Input Bank 1 or Single Sensor?

- Possible causes include a faulty knock sensor, wiring issues, poor electrical connections, or a problem with the Engine Control Module (ECM).

3. How can I diagnose OBDII code P0333 in a Subaru related to Knock Sensor 2 Circuit High Input Bank 1 or Single Sensor?

- Diagnosis involves using a scan tool to read the code, checking the knock sensor wiring and connections, performing a resistance test on the sensor, and monitoring sensor data while the engine is running.

4. Can I continue driving my Subaru with OBDII code P0333 related to Knock Sensor 2 Circuit High Input Bank 1 or Single Sensor?

- It is not recommended to drive the vehicle with this code present, as it can lead to engine damage and reduced performance. It is best to address the issue promptly.

5. How can I repair OBDII code P0333 in a Subaru related to Knock Sensor 2 Circuit High Input Bank 1 or Single Sensor?

- Repair options include replacing the faulty knock sensor, repairing or replacing damaged wiring, ensuring proper electrical connections, and resetting the ECM.

6. Are there any DIY tips for fixing OBDII code P0333 in a Subaru related to Knock Sensor 2 Circuit High Input Bank 1 or Single Sensor?

- DIY enthusiasts can attempt to replace the knock sensor themselves, following the manufacturer's guidelines and proper safety precautions. However, complex wiring issues may require professional assistance.

7. Will OBDII code P0333 in a Subaru related to Knock Sensor 2 Circuit High Input Bank 1 or Single Sensor affect fuel efficiency?

- Yes, this code can impact fuel efficiency due to engine performance issues caused by improper knock sensor function. Resolving the code can help improve fuel economy.

8. How long does it typically take to repair OBDII code P0333 in a Subaru related to Knock Sensor 2 Circuit High Input Bank 1 or Single Sensor?

- The repair time can vary depending on the exact cause of the issue and the extent of the repair needed. It may take a few hours to a full day to diagnose and fix the problem.

9. Is it necessary to reset the Check Engine Light after repairing OBDII code P0333 in a Subaru related to Knock Sensor 2 Circuit High Input Bank 1 or Single Sensor?

- Yes, it is recommended to reset the Check Engine Light using a scan tool after repairing the issue to clear the code and ensure proper monitoring of the vehicle's systems.