Engine-Codes.com
Engine-Codes – Land Rover – P0171 Land Rover

P0171 Land Rover Code - System Too Lean Bank 1

Quick Answer

The P0171 diagnostic trouble code (DTC) for Land Rover vehicles indicates that the engine control module (ECM) has detected a lean air-fuel mixture on Bank 1. Common causes include Vacuum leaks, Faulty oxygen sensor, Clogged fuel filter. 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
P0171 Land Rover indicates System Too Lean Bank 1.
Common causes
Common causes include Vacuum leaks, Faulty oxygen sensor, Clogged fuel filter.
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 07, 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 P0171 Land Rover Description

The P0171 diagnostic trouble code (DTC) for Land Rover vehicles indicates that the engine control module (ECM) has detected a lean air-fuel mixture on Bank 1. This means that there is an imbalance in the air-fuel ratio, with more air entering the engine than the amount of fuel being delivered. This imbalance can lead to a variety of performance issues, including reduced power, rough idle, poor acceleration, and potential engine misfires.

OBDII Code P0171 Land Rover - System Too Lean Bank 1
P0171 Land Rover Code - System Too Lean Bank 1

Common Causes of P0171 Land Rover

  1. Vacuum leaks
  2. Faulty oxygen sensor
  3. Clogged fuel filter
  4. Malfunctioning mass airflow sensor
  5. Issues with fuel injectors

Symptoms of P0171 Land Rover

  1. Reduced power and acceleration
  2. Rough idle or stalling
  3. Engine misfires
  4. Check Engine Light illuminated
  5. Increased fuel consumption

How to Fix P0171 Land Rover

  1. Perform a thorough inspection of the intake system and vacuum lines to check for any leaks.
  2. Test the oxygen sensor and replace if necessary.
  3. Replace the fuel filter to ensure proper fuel delivery.
  4. Clean or replace the mass airflow sensor to improve air intake measurement.
  5. Inspect and clean or replace fuel injectors to ensure proper fuel atomization.

Cost to Fix P0171 Land Rover

The typical repair costs for addressing a P0171 code on a Land Rover can range from $100 to $500, depending on the specific cause of the lean air-fuel mixture and the parts that need to be replaced. This estimate includes both parts and labor. It is important to note that diagnostic time and labor rates at auto repair shops can vary based on location, vehicle make and model, and engine type. It is recommended to obtain quotes from local shops for a more accurate cost estimate.

What does this mean?

Tech Notes for P0171 Land Rover

If the P0171 is combined with the P0174 code, it's very likely that the problem is caused by an intake leak. If there are no intake leaks, the next step is to replace the air filter and clean the air flow meter. If the problem persists the front oxygen (O2) sensor may need to be replaced.

When is the Code Detected?

- Fuel injection system does not operate properly.
- The amount of mixture ratio compensation is too small. (The mixture ratio is too lean.)

Need more information about the P0171 Land Rover code?

Need more information on how to fix the P0171 Land Rover code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0171 Land Rover 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 P0171 Land Rover Code

1. What does the OBDII code P0171 for a Land Rover mean?

The code P0171 indicates a "System Too Lean Bank 1" condition, which means that the engine is receiving too much air and not enough fuel.

2. What are the common symptoms of OBDII code P0171 in a Land Rover?

Common symptoms of code P0171 include rough idling, poor acceleration, decreased fuel efficiency, and potential stalling.

3. What are the possible causes of the OBDII code P0171 in a Land Rover?

Some common causes of code P0171 in a Land Rover include a vacuum leak, faulty oxygen sensor, clogged fuel filter, dirty MAF sensor, or a malfunctioning fuel injector.

4. How can I diagnose the OBDII code P0171 in my Land Rover?

To diagnose code P0171, you can perform a visual inspection for leaks, check the oxygen sensor readings, test the fuel pressure, inspect the MAF sensor, and scan for any other related trouble codes.

5. How can I repair the OBDII code P0171 in my Land Rover?

Repairing code P0171 may involve fixing any vacuum leaks, replacing a faulty oxygen sensor, cleaning or replacing the MAF sensor, changing the fuel filter, or addressing any other identified issues causing the lean condition.

6. Can driving with the OBDII code P0171 in my Land Rover cause further damage?

Continuing to drive with code P0171 can potentially cause damage to the engine over time due to the lean fuel mixture affecting combustion and engine performance.

7. Will resetting the OBDII code P0171 in my Land Rover make it go away permanently?

Simply resetting the code may temporarily clear the warning light, but if the underlying issue causing code P0171 is not addressed, the code is likely to return.

8. How much does it typically cost to repair the OBDII code P0171 in a Land Rover?

The cost of repairing code P0171 in a Land Rover can vary widely depending on the specific cause of the lean condition and the parts or components that need to be replaced. Costs can range from relatively minor to more significant repairs.

9. Can I continue driving my Land Rover with the OBDII code P0171 if the symptoms are mild?

It is not recommended to ignore code P0171 even if the symptoms are mild, as the underlying issue can worsen over time and potentially lead to more severe engine problems.

10. How often should I have my Land Rover checked for potential issues related to the OBDII code P0171?

It is advisable to have your Land Rover regularly serviced and inspected by a qualified mechanic to address any potential issues, including those related to code P0171, before they escalate into more significant problems.

Discuss the causes and fixes for P0171 Land Rover OBDII Code

Submit a New Comment

  • I've changed the O2 sensor of which i had a code for bad heater circuit. P0135 Have no intake leaks,so next on the list is to change air filter and clean mass air sensor.

    Reply to Comment

  • Hi Tracy - did that work for you? Did spark plugs have anything to do with your repair? I know it's been a while. Thanks!

    Reply to Comment