FAULTBASE
NEWSASKCars
© 2025 FAULTBASE
All rights reserved.
v2.0.0 • Production
ContactPrivacyImpressum
Home/Cars/Honda/Accord/Eleventh Generation (2023-present)/how to fix P0174 code on Honda Accord 8th Generation (2008-2012)?

how to fix P0174 code on Honda Accord 8th Generation (2008-2012)?

Honda Accord Eleventh Generation (2023-present)

Severity: highDifficulty: mediumError Code: P01742-4 hours
3 min read
600 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Learn how to diagnose and fix P0174 engine too lean condition in Honda Accord 2008-2012. Step-by-step guide with diagnostic procedures and repair instructions.

Error Code
P0174
Component
Engine
Repair Time
2-4 hours

Safety Warnings

  • ⚠Disconnect the battery before working on electrical systems.
  • ⚠Allow the engine to cool before opening any components to avoid burns.

Symptoms

  • •Check engine light illuminated
  • •Rough idle or stalling
  • •Decreased engine performance
  • •Poor fuel economy
  • •Increased emissions
  • •Backfiring or hesitation during acceleration

Diagnostic Steps

  1. 1Scan for error codes using an OBD-II scanner to confirm the P0174 code and check for any related codes.
  2. 2Inspect the air intake system for vacuum leaks, including hoses, gaskets, and the intake manifold.
  3. 3Check the mass air flow (MAF) sensor for proper operation and cleanliness.
  4. 4Inspect the fuel system, including fuel pressure and fuel injector function.
  5. 5Examine the oxygen sensor readings with a multimeter or scan tool for abnormalities.
  6. 6Verify the engine coolant temperature (ECT) sensor operation to ensure accurate engine temperature readings.

Solution

Solution

1. Preparation

  • Gather necessary tools and parts.
  • Disconnect the battery to prevent electrical short circuits.

2. Inspect and Repair Vacuum Leaks

  • Tools Required: Vacuum gauge, hose clamps, basic hand tools.
  • Visually inspect all vacuum lines and hoses connected to the intake manifold.
  • Use a vacuum gauge to confirm the integrity of the intake system.
  • Replace any damaged or cracked hoses and ensure all connections are tight.

3. Clean or Replace MAF Sensor

  • Tools Required: MAF sensor cleaner, screwdrivers.
  • Remove the MAF sensor from the air intake duct.
  • Spray the MAF sensor with MAF cleaner and allow it to dry completely.
  • Reinstall the MAF sensor and ensure it is securely fastened.

4. Check Fuel System

  • Tools Required: Fuel pressure gauge, injector cleaner.
  • Connect a fuel pressure gauge to the fuel rail to verify fuel pressure meets manufacturer specifications (typically around 40-50 psi).
  • If pressure is low, check the fuel pump, filter, and regulator for issues.
  • Clean fuel injectors using a professional cleaner or replace them if necessary.

5. Inspect Oxygen Sensors

  • Tools Required: O2 sensor socket, multimeter (if necessary).
  • Inspect the downstream oxygen sensor for damage or corrosion.
  • If necessary, replace the oxygen sensor with a new one.

6. Verify Engine Coolant Temperature Sensor

  • Tools Required: Multimeter.
  • Check the resistance of the ECT sensor according to the manufacturer's specifications.
  • Replace the ECT sensor if it does not meet specifications.

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
  • Vacuum gauge
  • Fuel pressure gauge
  • MAF sensor cleaner
  • Multimeter
  • Basic hand tools (screwdrivers, wrenches)

Parts Required

  • Vacuum hoses (if damaged)
  • MAF sensor (if faulty)
  • Fuel injectors (if clogged)
  • Oxygen sensor (if faulty)
  • Engine coolant temperature sensor (if faulty)

Additional Information

Error CodeP0174
Component

Engine

Repair Time

2-4 hours

Difficulty

medium

Severity

high

Tools

6 items

Parts

5 items

Related Faults

Discover similar issues

  1. how to reset the airbag light on my Honda Accord 9th Generation (2013-2017)

    Learn how to reset the airbag light on your 2013-2017 Honda Accord. Step-by-step guide with diagnostic steps and safety precautions.

    Component:Electrical
    Symptoms
    • •Airbag warning light is ON on the dashboard
    • •Possible airbag system faults indicated
    • +{count} more
  2. how do I know if my Honda Accord needs a steering rack replacement?

    Learn how to diagnose and replace the steering rack in your Honda Accord. Step-by-step instructions, symptoms, and tools required for a successful rep...

    Component:Steering
    Symptoms
    • •Difficulty in steering or a feeling of looseness in the steering wheel
    • •Unusual noises when turning the steering wheel (e.g., clunking or grinding sounds)
    • +{count} more
  3. what does the check engine light mean on my Honda Accord 9th Generation (2013-2017)?

    Learn how to diagnose and fix the check engine light issue in Honda Accord 2013-2017. Step-by-step guide with symptoms, diagnostic steps, and repair i...

    Component:Engine
    Symptoms
    • •Check engine light illuminated on the dashboard
    • •Engine running rough or misfiring
    • +{count} more
  4. my Honda Accord 9th Generation (2013-2017) transmission makes a loud noise when shifting

    Learn how to diagnose and fix loud transmission noise in Honda Accord 9th Generation (2013-2017). Step-by-step guide with symptoms and solutions.

    Component:Transmission
    Symptoms
    • •Loud clunking or grinding noise during shifting
    • •Delayed or harsh engagement when changing gears
    • +{count} more
  5. what causes Honda Accord 8th Generation (2008-2012) electrical shorts during rain?

    Learn how to diagnose and fix electrical shorts in Honda Accord 2008-2012 during rain. Step-by-step guide with symptoms, diagnostic steps, and repair ...

    Component:Electrical
    Symptoms
    • •Dashboard warning lights illuminated
    • •Intermittent electrical component failure (e.g., headlights, radio)
    • +{count} more
  6. how to check the transmission fluid level on my Honda Accord 9th Generation (2013-2017)

    Learn how to check the transmission fluid level in your Honda Accord 9th Generation (2013-2017). Step-by-step guide with symptoms and diagnostic steps...

    Component:Transmission
    Symptoms
    • •Difficulty shifting gears
    • •Slipping transmission
    • +{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