FAULTBASE
NEWSASKCars
© 2025 FAULTBASE
All rights reserved.
v2.0.0 • Production
ContactPrivacyImpressum
Home/Cars/Honda/Civic/11th Generation (2022-Present)/how to fix P0171 code in Honda Civic 9th Generation (2012-2015)

how to fix P0171 code in Honda Civic 9th Generation (2012-2015)

Honda Civic 11th Generation (2022-Present)

Severity: mediumDifficulty: mediumError Code: P01712-4 hours
4 min read
604 words

Problem Statement

Learn how to diagnose and fix P0171 code in Honda Civic (2012-2015). Step-by-step guide with symptoms, diagnostic steps, tools, and repair instructions.

Error Code
P0171
Component
Engine
Repair Time
2-4 hours

Safety Warnings

  • ⚠Disconnect the battery before working on electrical components.
  • ⚠Allow the engine to cool before working on it to prevent burns.

Symptoms

  • •Check engine light illuminated
  • •Rough idle or stalling
  • •Poor acceleration or loss of power
  • •Decreased fuel economy
  • •Increased engine noise
  • •Possible fuel odor

Diagnostic Steps

  1. 1Scan the vehicle’s OBD-II system to confirm the P0171 code and check for additional codes.
  2. 2Inspect the air intake system for leaks, including hoses and the intake manifold.
  3. 3Check the Mass Air Flow (MAF) sensor for proper operation and cleanliness.
  4. 4Inspect fuel pressure to ensure it meets specifications.
  5. 5Examine the oxygen sensors for proper function and potential faults.
  6. 6Look for vacuum leaks in the engine bay using a smoke test or by visually inspecting hoses.

Solution

Solution

1. Preparation

  • Gather tools and parts needed for the repair.
  • Disconnect the negative battery terminal to prevent electrical shorts.
  • Ensure the engine is cool before starting work.

2. Inspect Air Intake System

  • Tools Required: Screwdriver set, vacuum gauge
  • Remove the air intake duct and visually inspect for cracks or broken hoses.
  • Replace any damaged components.
  • Reattach the air intake duct and ensure all clamps are secure.

3. Clean Mass Air Flow (MAF) Sensor

  • Tools Required: MAF cleaner (specific cleaner for MAF sensors)
  • Locate the MAF sensor in the air intake system.
  • Disconnect the electrical connector and remove the sensor.
  • Spray the MAF cleaner onto the sensing elements and let it dry completely.
  • Reinstall the MAF sensor and reconnect the electrical connector.

4. Check Fuel Pressure

  • Tools Required: Fuel pressure gauge
  • Locate the fuel rail and connect the fuel pressure gauge.
  • Turn the ignition on (do not start the engine) to check the pressure.
  • Compare the reading with the manufacturer specifications (usually 40-50 psi).
  • If the pressure is low, check the fuel pump and filter for faults.

5. Inspect Oxygen Sensors

  • Tools Required: O2 sensor socket
  • Locate the upstream oxygen sensor (before the catalytic converter).
  • Disconnect the electrical connector and remove the sensor using an O2 sensor socket.
  • Inspect the sensor for contamination or damage and replace if necessary.
  • Reinstall the new or cleaned sensor and reconnect the electrical connector.

6. Reassemble and Reset Codes

  • Reconnect the battery terminal.
  • Start the engine and allow it to reach operating temperature.
  • Use the OBD-II scanner to clear the P0171 code and check for any reoccurrence.

Verification

After completing the repair, verify that the issue has been resolved:

  • Test the affected component to ensure it functions correctly
  • Check for any error codes or warning lights
  • Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

  • •Follow the manufacturer's recommended maintenance schedule
  • •Address warning signs early before they develop into major issues
  • •Use quality parts and fluids recommended for your vehicle
  • •Keep detailed records of all repairs and maintenance

Tools & Equipment Required

  • OBD-II scanner
  • Screwdriver set
  • Vacuum gauge
  • MAF cleaner
  • Fuel pressure gauge
  • O2 sensor socket

Parts Required

  • Mass Air Flow (MAF) sensor (if faulty)
  • Upstream oxygen sensor (if faulty)
  • Fuel filter (if clogged)

Additional Information

Error CodeP0171
Component

Engine

Repair Time

2-4 hours

Difficulty

medium

Severity

medium

Tools

6 items

Parts

3 items

Related Faults

Discover similar issues

  1. how to reset the oil maintenance light on Honda Civic 10th Generation (2016-2021)

    Learn how to reset the oil maintenance light on Honda Civic 10th Generation (2016-2021) after an oil change. Step-by-step guide for quick reset.

    Component:Electrical
    Symptoms
    • •Oil maintenance light remains illuminated on the dashboard
    • •No other warning lights related to engine or oil are present
    • +{count} more
  2. why is my Honda Civic 10th Generation (2016-2021) losing power while driving

    Discover how to diagnose and fix loss of power issues in Honda Civic 10th Generation (2016-2021). Step-by-step guide with symptoms and solutions.

    Component:Engine
    Symptoms
    • •Engine warning light illuminated
    • •Noticeable decrease in acceleration
    • +{count} more
  3. why does my Honda Civic 10th Generation (2016-2021) stall at stoplights

    Learn how to diagnose and fix engine stalling issues at stoplights in Honda Civic 10th Generation (2016-2021). Step-by-step guide with diagnostic proc...

    Component:Engine
    Symptoms
    • •Check engine light illuminated
    • •Engine stalling when coming to a stop
    • +{count} more
  4. how to fix the transmission fluid leak in my Honda Civic 10th Generation (2016-2021)

    Learn how to diagnose and fix transmission fluid leaks in Honda Civic 10th Generation (2016-2021). Step-by-step guide with tools and tips.

    Component:Transmission
    Symptoms
    • •Transmission slipping or harsh shifting
    • •Fluid spots on the ground under the vehicle
    • +{count} more
  5. how to reset the maintenance light in Honda Civic 10th Generation (2016-2021)

    Learn how to reset the maintenance light on Honda Civic 10th Generation (2016-2021) with this step-by-step guide. Quick and easy instructions included...

    Component:Electrical
    Symptoms
    • •Maintenance light is illuminated on the dashboard
    • •Reminder notifications for maintenance at startup
    • +{count} more
  6. my Honda Civic 10th Generation (2016-2021) has a check engine light and runs rough

    Learn to diagnose and fix engine roughness and check engine light issues in Honda Civic 2016-2021. Step-by-step guide with diagnostic and repair instr...

    Component:Engine
    Symptoms
    • •Check engine light illuminated
    • •Rough idle
    • +{count} more

Share this solution

Comments

Sign in to share your thoughts

Sign In

No comments yet

Be the first to share your thoughts

Back to Generation