AutoCodes – Volkswagen – P1147 Volkswagen

P1147 Volkswagen Code - HO2S21 System Too Lean

Quick Answer

P1147 Volkswagen indicates HO2S21 System Too Lean. Common causes include Faulty HO2S21, HO2S21 harness is open or shorted, HO2S21 circuit poor electrical connection. 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: P1147 Volkswagen indicates HO2S21 System Too Lean.
Common causes: Common causes include Faulty HO2S21, HO2S21 harness is open or shorted, HO2S21 circuit poor electrical connection.
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 4,975

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 May 02, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1147 Volkswagen Description

OBDII Code P1147 Volkswagen - HO2S21 System Too Lean - AutoCodes.com — P1147 Volkswagen Code - HO2S21 System Too Lean

What does this mean?

What are the Possible Causes of the DTC P1147 Volkswagen?

Faulty HO2S21
HO2S21 harness is open or shorted
HO2S21 circuit poor electrical connection

How to Fix the DTC P1147 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 P1147 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 P1147 Volkswagen code?

Need more information on how to fix the P1147 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 P1147 Volkswagen Code

1. What are the common symptoms of OBDII code P1147 in a Volkswagen related to the HO2S21 system too lean?

- Common symptoms include rough idling, poor fuel efficiency, hesitation during acceleration, and potential engine misfires.

2. What are the possible causes of the HO2S21 system too lean code P1147 in a Volkswagen?

- Causes may include a vacuum leak, malfunctioning oxygen sensor, fuel injector issues, exhaust system leaks, or a faulty mass airflow sensor.

3. How can I diagnose the OBDII code P1147 in my Volkswagen indicating a lean HO2S21 system?

- Diagnose by checking for vacuum leaks, inspecting the oxygen sensor, testing the fuel injectors, examining the exhaust system, and verifying the mass airflow sensor's functionality.

4. What are some repair tips for fixing the HO2S21 system too lean code P1147 in a Volkswagen?

- Repair tips include fixing any vacuum leaks, replacing the oxygen sensor if faulty, cleaning or replacing clogged fuel injectors, repairing exhaust leaks, and ensuring the mass airflow sensor is working properly.

5. Can driving with the P1147 code indicating a lean HO2S21 system in my Volkswagen cause further damage?

- Continuing to drive with this issue can potentially lead to decreased fuel efficiency, engine performance issues, and damage to the catalytic converter over time.

6. How much does it typically cost to repair the OBDII code P1147 related to the HO2S21 system too lean in a Volkswagen?

- Repair costs can vary depending on the specific cause of the issue, but they may range from $100 for simple fixes like replacing a sensor to over $500 for more complex repairs involving multiple components.

7. Is it safe to drive my Volkswagen with the check engine light on due to the P1147 code for a lean HO2S21 system?

- While it may be safe to drive for a short period, it is recommended to address the issue promptly to prevent potential damage to the engine or emission control system.

8. Can I reset the OBDII code P1147 for the HO2S21 system too lean in my Volkswagen without fixing the underlying issue?

- Resetting the code without fixing the root cause will only temporarily turn off the check engine light. The problem will likely resurface, and it is best to address the issue to prevent further issues.

9. How long does it typically take to repair the HO2S21 system too lean code P1147 in a Volkswagen?

- The repair time can vary based on the specific cause and complexity of the issue. Simple fixes may take a couple of hours, while more involved repairs could take a full day or longer.

10. Can I fix the OBDII code P1147 indicating a lean HO2S21 system in my Volkswagen myself, or should I take it to a professional mechanic?

- While some simple fixes like replacing a sensor may be DIY-friendly, diagnosing and repairing more complex issues related to this code is best left to a professional mechanic with the necessary tools and expertise.