Engine-Codes.com
Engine-Codes – Volvo – P1171 Volvo

P1171 Volvo Code - Long Term Fuel Trim

Quick Answer

The P1171 Volvo code relates to the Long Term Fuel Trim on the vehicle. Common causes include Dirty or clogged fuel injectors, Vacuum leaks in the intake system, Faulty oxygen sensor. 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
P1171 Volvo indicates Long Term Fuel Trim.
Common causes
Common causes include Dirty or clogged fuel injectors, Vacuum leaks in the intake system, Faulty oxygen sensor.
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 09, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code P1171 Volvo Description

The P1171 Volvo code relates to the Long Term Fuel Trim on the vehicle. The Long Term Fuel Trim refers to the adjustment made by the engine control module (ECM) to the air-fuel mixture to maintain optimal combustion efficiency. The ECM constantly monitors the amount of fuel being injected into the engine and adjusts it based on feedback from various sensors. The Long Term Fuel Trim is a value that represents the adjustment made over a longer period of time to compensate for any deviations from the ideal air-fuel ratio.

OBDII Code P1171 Volvo - Long Term Fuel Trim
P1171 Volvo Code - Long Term Fuel Trim

Common Causes of P1171 Volvo

  1. Dirty or clogged fuel injectors
  2. Vacuum leaks in the intake system
  3. Faulty oxygen sensor
  4. Malfunctioning mass airflow sensor
  5. Fuel pressure regulator issues

Symptoms of P1171 Volvo

  1. Decreased fuel efficiency
  2. Engine misfires or hesitation
  3. Rough idling or stalling
  4. Check Engine Light illuminated
  5. Reduced overall performance

How to Fix P1171 Volvo

  1. Perform a diagnostic scan to retrieve the P1171 code and any other related codes.
  2. Inspect the fuel injectors and clean or replace them if necessary.
  3. Check for vacuum leaks in the intake system and repair any leaks found.
  4. Test and replace the oxygen sensor if it is faulty.
  5. Inspect the mass airflow sensor and replace it if it is not functioning properly.

Cost to Fix P1171 Volvo

The cost of repairing a P1171 Volvo code can vary depending on the specific cause of the issue and the labor rates in your area. On average, the cost of diagnosing and repairing this issue could range from $200 to $500. This estimate includes the cost of parts such as fuel injectors, oxygen sensors, and mass airflow sensors, as well as the labor charges for the repair process. It's important to note that prices can fluctuate based on the vehicle's make and model, the location of the repair shop, and the extent of the repairs needed. It is recommended to consult with a qualified mechanic to get a more accurate estimate for your specific situation.

Need more information about the P1171 Volvo code?

Need more information on how to fix the P1171 Volvo code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1171 Volvo 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 P1171 Volvo Code

1. What is OBDII code P1171 in Volvo vehicles related to Long Term Fuel Trim?

- OBDII code P1171 in Volvo vehicles is related to Long Term Fuel Trim being outside the specified range, indicating a potential issue with fuel mixture adjustments.

2. What are common symptoms of OBDII code P1171 in a Volvo?

- Common symptoms of OBDII code P1171 in a Volvo may include rough idling, poor fuel economy, lack of power, and potentially the illumination of the check engine light.

3. What are possible causes of OBDII code P1171 in a Volvo?

- Possible causes of OBDII code P1171 in a Volvo include a vacuum leak, faulty oxygen sensor, fuel pressure regulator issues, intake air leaks, or a problem with the mass airflow sensor.

4. How can I diagnose the OBDII code P1171 in my Volvo?

- Diagnosing OBDII code P1171 in your Volvo may involve using an OBDII scanner to retrieve the code, checking for any visible signs of damage or leaks in the intake system, inspecting the oxygen sensor, and performing a fuel pressure test.

5. Can I drive my Volvo with OBDII code P1171?

- It is generally not recommended to drive your Volvo with OBDII code P1171, as it can lead to poor performance and potentially cause damage to the engine over time. It is best to address the issue promptly.

6. How can I repair OBDII code P1171 in my Volvo?

- Repairing OBDII code P1171 in your Volvo may involve fixing any vacuum leaks, replacing a faulty oxygen sensor, checking and adjusting the fuel pressure regulator, repairing intake air leaks, or cleaning or replacing the mass airflow sensor.

7. Is it necessary to reset the OBDII code P1171 after repairs?

- Yes, it is recommended to reset the OBDII code P1171 after making repairs to clear the code from the system and ensure that the issue has been properly addressed. This can be done using an OBDII scanner.

8. How can I prevent OBDII code P1171 from appearing in my Volvo?

- To prevent OBDII code P1171 from appearing in your Volvo, it is important to perform regular maintenance, such as checking for vacuum leaks, replacing the oxygen sensor as needed, ensuring proper fuel system operation, and keeping the intake system clean.

9. Can a DIY enthusiast fix OBDII code P1171 in a Volvo?

- Depending on the level of expertise and access to tools, a DIY enthusiast may be able to fix OBDII code P1171 in a Volvo by following repair guides, performing necessary inspections, and replacing any faulty components.

10. Is it necessary to visit a mechanic for OBDII code P1171 diagnosis and repair?

- While some DIY enthusiasts may be able to diagnose and repair OBDII code P1171 in a Volvo, it is recommended to visit a mechanic if you are unsure about the diagnosis or lack the tools and expertise to address the issue effectively.

Discuss the causes and fixes for P1171 Volvo OBDII Code

Submit a New Comment

Code P1171 Volvo comments

No comments found for this page.