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Engine-Codes – Generic – P117F

P117F Code - Bank 4 Oxygen Sensor Correction Behind Converter Rich Control Limit Exceeded

Quick Answer

The diagnostic trouble code P117F indicates that the Bank 4 Oxygen Sensor Correction Behind Converter has exceeded the rich control limit. Common causes include Faulty oxygen sensor, Fuel injector issues, Vacuum leaks in the intake system. 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
P117F indicates Bank 4 Oxygen Sensor Correction Behind Converter Rich Control Limit Exceeded.
Common causes
Common causes include Faulty oxygen sensor, Fuel injector issues, Vacuum leaks in the intake system.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 08, 2024
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Code P117F Description

The diagnostic trouble code P117F indicates that the Bank 4 Oxygen Sensor Correction Behind Converter has exceeded the rich control limit. This means that the oxygen sensor located downstream of the catalytic converter in Bank 4 (which refers to the side of the engine where cylinder 4 is located) is detecting a mixture that is too rich, meaning there is an excess of fuel in the exhaust gases. This can lead to a variety of issues with the vehicle's emissions system, fuel efficiency, and overall performance.

OBDII Code P117F - Bank 4 Oxygen Sensor Correction Behind Converter Rich Control Limit Exceeded
P117F Code - Bank 4 Oxygen Sensor Correction Behind Converter Rich Control Limit Exceeded

Common Causes of P117F

  1. Faulty oxygen sensor
  2. Fuel injector issues
  3. Vacuum leaks in the intake system
  4. Exhaust leaks near the oxygen sensor
  5. Malfunctioning catalytic converter

Symptoms of P117F

  1. Decreased fuel efficiency
  2. Poor engine performance or hesitation
  3. Check Engine Light illuminated
  4. Strong smell of gasoline from the exhaust
  5. Black smoke coming from the tailpipe

How to Fix P117F

  1. Diagnose the specific cause of the rich mixture by scanning for additional trouble codes and performing a thorough inspection of the fuel system and exhaust components.
  2. Replace the Bank 4 oxygen sensor if it is faulty or contaminated.
  3. Check and clean the fuel injectors or replace them if necessary.
  4. Inspect and repair any vacuum leaks in the intake system.
  5. Test and potentially replace the catalytic converter if it is not functioning properly.

Cost to Fix P117F

The cost of repairing a P117F trouble code can vary depending on the specific cause of the issue. In general, replacing an oxygen sensor can cost between $100 and $300, while addressing fuel injector or vacuum leak issues can range from $200 to $500. If the catalytic converter needs to be replaced, this can be a more expensive repair, typically costing between $500 and $2000. Labor rates at auto repair shops can vary, but you can expect to pay between $80 and $150 per hour for diagnosis and repair. Be sure to get multiple quotes from different shops to find the best price for your specific make and model of vehicle.

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Code P117F Information for Specific Makes

  • P117F Audi — Bank 4 Oxygen Sensor Correction Behind Converter Rich Control Limit Exceeded
  • P117F Volkswagen — Bank 4 Oxygen Sensor Correction Behind Converter Rich Control Limit Exceeded
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 P117F Code

1. What are the common symptoms of OBDII code P117F?

The common symptoms of code P117F include decreased fuel efficiency, rough idling, engine misfires, and the illumination of the check engine light.

2. What can cause OBDII code P117F to trigger?

Code P117F is typically triggered by a faulty oxygen sensor, a vacuum leak, a malfunctioning fuel injector, or issues with the fuel system.

3. How serious is OBDII code P117F?

While code P117F may not cause immediate harm to your vehicle, it can lead to decreased engine performance and fuel efficiency if left unresolved. It is advisable to address the issue promptly.

4. How can I diagnose OBDII code P117F?

Diagnosing code P117F involves using an OBDII scanner to retrieve the fault code and examining the oxygen sensor, fuel injectors, and vacuum lines for any signs of damage or malfunction.

5. What are some repair tips for OBDII code P117F?

Repairing code P117F may involve replacing the faulty oxygen sensor, fixing any vacuum leaks, cleaning or replacing fuel injectors, and ensuring proper operation of the fuel system.

6. Can I drive my vehicle with OBDII code P117F?

While it may be possible to drive your vehicle with code P117F, it is recommended to address the issue as soon as possible to prevent further damage and ensure optimal engine performance.

7. How much does it cost to fix OBDII code P117F?

The cost of fixing code P117F can vary depending on the underlying cause of the issue, the extent of repairs needed, and the labor rates of the repair shop. It is advisable to obtain quotes from different mechanics.

8. How long does it take to repair OBDII code P117F?

The repair time for code P117F can vary depending on the specific repairs needed and the availability of parts. Simple fixes like replacing an oxygen sensor may take a few hours, while more complex issues could take longer.

9. Can a DIY enthusiast fix OBDII code P117F?

DIY enthusiasts with the necessary tools and knowledge of automotive repair may be able to fix code P117F themselves, especially if the issue is related to a simple fix like replacing an oxygen sensor or fixing a vacuum leak.

10. Will resetting the check engine light resolve OBDII code P117F?

Resetting the check engine light may temporarily turn off the warning indicator, but it will not fix the underlying issue causing code P117F. It is important to diagnose and repair the problem to prevent future occurrences.

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