AutoCodes – Volkswagen – P0428 Volkswagen

P0428 Volkswagen Code - Catalyst Temperature Sensor High Input Bank 1 Sensor 1

Quick Answer

The Engine Control Module (ECM) monitors the Catalyst Temperature Sensor Circuit Performance, which measures the temperature of the catalyst. Common causes include Faulty Catalyst Temperature Sensor, Catalyst Temperature Sensor harness is open or shorted, Catalyst Temperature Sensor circuit poor electrical connection. 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: P0428 Volkswagen indicates Catalyst Temperature Sensor High Input Bank 1 Sensor 1.
Common causes: Common causes include Faulty Catalyst Temperature Sensor, Catalyst Temperature Sensor harness is open or shorted, Catalyst Temperature Sensor circuit poor electrical connection.
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 4,905

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 Aug 20, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0428 Volkswagen Description

The Engine Control Module (ECM) monitors the Catalyst Temperature Sensor Circuit Performance, which measures the temperature of the catalyst. Catalyst Temperature Sensor function by increasing their resistance with increasing exhaust gas temperature. The ECM sets the OBDII code when the Catalyst Temperature Sensor signal is not to factory specifications.

OBDII Code P0428 Volkswagen - Catalyst Temperature Sensor High Input Bank 1 Sensor 1 - AutoCodes.com — P0428 Volkswagen Code - Catalyst Temperature Sensor High Input Bank 1 Sensor 1

What does this mean?

What are the Possible Causes of the DTC P0428 Volkswagen?

Faulty Catalyst Temperature Sensor
Catalyst Temperature Sensor harness is open or shorted
Catalyst Temperature Sensor circuit poor electrical connection

How to Fix the DTC P0428 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0428 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.

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Need more information on how to fix the P0428 Volkswagen code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0428 Volkswagen code diagnosed by a professional: Find a repair shop in your area

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 P0428 Volkswagen Code

1. What are the common symptoms of OBDII code P0428 in a Volkswagen?

- Common symptoms include poor fuel economy, reduced engine performance, and the illumination of the check engine light.

2. What does the OBDII code P0428 in a Volkswagen indicate?

- The code P0428 indicates a high input from the catalyst temperature sensor located in Bank 1 Sensor 1 of the vehicle.

3. What are the possible causes of OBDII code P0428 in a Volkswagen?

- Possible causes include a faulty catalyst temperature sensor, wiring issues, a damaged catalytic converter, or an issue with the engine control module (ECM).

4. How can I diagnose the OBDII code P0428 in my Volkswagen?

- Diagnosis involves using an OBDII scanner to retrieve the code, inspecting the catalyst temperature sensor and its wiring, and testing the functionality of the catalytic converter.

5. Can I continue driving my Volkswagen with OBDII code P0428?

- It is not recommended to drive the vehicle with code P0428 as it can lead to further damage to the catalytic converter and negatively impact engine performance.

6. How can I repair OBDII code P0428 in my Volkswagen?

- Repair options include replacing the catalyst temperature sensor, repairing any damaged wiring, addressing catalytic converter issues, and resetting the ECM.

7. Is it possible to reset the check engine light after fixing OBDII code P0428 in my Volkswagen?

- Yes, the check engine light can be reset using an OBDII scanner after the issue causing code P0428 has been resolved.

8. Will OBDII code P0428 cause my Volkswagen to fail emissions testing?

- Yes, code P0428 can cause your Volkswagen to fail emissions testing due to the malfunction of the catalyst temperature sensor.

9. How much does it typically cost to repair OBDII code P0428 in a Volkswagen?

- The cost of repair can vary depending on the exact cause of the issue, but it may range from $200 to $800, including parts and labor.

10. Can a DIY enthusiast fix OBDII code P0428 in a Volkswagen?

- While some aspects of the repair may be DIY-friendly, it is recommended to consult with a professional mechanic for accurate diagnosis and proper repair to ensure the issue is fully resolved.