AutoCodes – Volkswagen – P0333 Volkswagen

P0333 Volkswagen Code - Knock Sensor 2 Circuit High

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 Volkswagen indicates Knock Sensor 2 Circuit High.
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 20,908

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 Volkswagen 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 Volkswagen - Knock Sensor 2 Circuit High - AutoCodes.com — P0333 Volkswagen Code - Knock Sensor 2 Circuit High

What does this mean?

What are the Possible Causes of the DTC P0333 Volkswagen?

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 Volkswagen?

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 Volkswagen 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 Volkswagen code?

Need more information on how to fix the P0333 Volkswagen code? Get Access to Factory Service Manuals

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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 Volkswagen Code

1. What does the OBDII code P0333 mean on a Volkswagen?

The P0333 code indicates that there is a high input problem with the knock sensor 2 circuit, suggesting the sensor is outputting a voltage level higher than the specifications recommend.

2. What are the common symptoms of code P0333 in a Volkswagen?

Symptoms can include a check engine light, poor engine performance, unusual noises (like pinging or knocking) from the engine, and possible reduced fuel efficiency.

3. What can cause the P0333 code to appear in a Volkswagen?

Causes might include a faulty knock sensor, wiring issues (like shorts or opens), corrosion on connectors, or problems with the Engine Control Module (ECM).

4. How do you diagnose the P0333 code in a Volkswagen?

Diagnosis should begin with a visual inspection of the knock sensor and its connections. Use a multimeter to check the sensor's resistance and voltage. Scan tools can also review the sensor's performance in real-time to confirm the malfunction.

5. What are the steps to fix the P0333 code in a Volkswagen?

Repair steps might include replacing the knock sensor, repairing or replacing damaged wires or connectors, and in rare cases, updating or replacing the ECM.

6. Is it safe to drive a Volkswagen with a P0333 code?

While you can technically still drive, it is not recommended as ongoing knocking can cause serious damage to the engine. It's best to address the issue promptly.

7. How much does it usually cost to repair a P0333 code in a Volkswagen?

The cost largely depends on the cause. A knock sensor replacement can range from $200 to $400 including parts and labor. If the issue is related to wiring or the ECM, costs can be significantly higher.

8. Could a P0333 code affect the fuel economy of a Volkswagen?

Yes, if the knock sensor is malfunctioning, the ECM may not optimize the engine's spark timing accurately, potentially leading to decreased fuel efficiency.

9. What other codes might appear with P0333 on a Volkswagen?

Often, knock sensor codes can appear alongside other engine misfire, fuel system, or sensor-specific codes, due to the related nature of these systems in engine management.

10. How can I prevent the P0333 code from happening in my Volkswagen?

Regular maintenance, including checking engine sensors and wiring during routine service checks, can help prevent issues related to knock sensor malfunctions.