2003-2008 Honda Accord Diesel I-CTDI MAF (Mass Air Flow) Sensor Clean

Chassis codes: CN1 and CN2, Engine codes: N22A1

  1. Accord_N22
    Difficulty Level:
     
    Basic
    2003-2008 Honda Accord Diesel I-CTDI MAF (Mass Air Flow) Sensor Clean

    As there are no DIY guides for cleaning the MAP and MAF sensors on the I-CTDI engines I thought it would be a good opportunity for my second and third DIY guides.

    I have created separate guides for MAP and MAF sensors

    I have just performed it on my own car and it is relatively a straight forward task

    Click here to find the guide on how to clean the MAP sensor
    2003-2008 Honda Accord Diesel I-CTDI MAP (Mass Air Pressure) Sensor Clean

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    Objective
    To clean the MAF sensor on the 2.2 I-CTDI Diesel Engines
    See below a diagram of where the MAF sensor is located in the I-CTDI engine bay
    (engine insulator cover is removed)

    1.JPG

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    DIY Guide Compatibility
    For:
    -Honda Accord Tourer Estate 2003-2008 (diesel models)
    -Honda Accord Saloon 2003-2008 (diesel models)
    Chassis codes: CN1 and CN2
    Engine codes: N22A1

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    Disclaimer
    I won't take any responsibility for and damage or injury. You follow this guide at your own risk.
    If you do not agree, please do not follow this guide.
    This DIY has been written and intended only as a guide.
    There may be other or easier ways of performing a stage.
    ALWAYS disconnect the battery when working with anything electrical on your car
    ALWAYS wear gloves when handling cleaning solutions (it can irritate skin)
    TAKE EXTRA CARE WHEN HANDLING THESE SENSORS – THEY ARE FRAGILE!!!!!

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    Background
    Whilst I had EGR issues I also had slight hesitation upon acceleration.
    Some advise from members was to check both the MAF and MAP sensors and to ensure they are clean
    The procedure is relatively straight forward so I decided to give it a go.
    When both the MAP and MAF sensors were clean the engine response improved noticeably.

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    Equipment Required

    To get started here is a list of some of the tools you may require

    -CRC Air Sensor Clean Spray
    -Laser 3389, 5 sided torx screw set (TS25 torx bit will be used)
    -Metric sockets: 10mm
    -Socket Extension
    -Small Ratchet (1/4 inch)
    Link to buy CRC Air Sensor Clean Spray


    2.

    Link to buy Laser 3389, 5 sided torx scew set


    3.

    NOTE: DO NOT USE ANY OTHER CLEANING SPRAY FOR THESE SENSORS,
    OTHER CLEANING AGENTS LIKE BRAKE CLEANER ARE TOO AGGRESSIVE AND WILL DAMAGE THE SENSORS/COMPONENTS.
    YOU HAVE BEEN WARNED!!!!!

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    Parts Required
    No parts are required however if they are faulty then you would need to replace them.
    Usually if they are faulty a MIL (malfunction indicator lamp) will illuminate or you will get a fault code once you plug in an OBD reader.

    MAF Sensor (Mass Air Flow)

    The MAF sensor is still available from Honda; however it is not cheap and also comes together with a small section of air intake tubing.

    Genuine Honda Part Number

    Item 18 37980RBDE01 METER ASSY, AIR FLOW

    Bosch Part Number

    F00C 262 063

    4.


    Places to buy a replacement MAF Sensor

    -Genuine Honda
    -Ebay (2nd Hand) Electronics, Cars, Fashion, Collectibles, Coupons and More | eBay

    Typical prices for the parts are approx £345.65 from Honda (as of 27-03-16)
    Or approx £20-£40 from a second hand source (however there is a risk the sensor could be faulty when buying second hand)

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    The Procedure

    Step 1

    Ensure the car is parked with the ignition off and the handbrake up.
    Pop open the engine hood and prop it up with the stand.

    Step 2

    Using your 10mm socket wrench, disconnect the negative battery terminal.
    Place aside and away from the battery terminal.
    (This step is vital: ALWAYS DISCONNECT THE BATTERY WHEN WORKING ON ANY ELECTRICALS)
    5.

    Step 3

    Using the 10mm socket wrench with an extension, loosen and remove all 4 bolts and washers that hold the engine insulation cover.
    Keep all the bolts and washers safe. These can easily fall into the engine bay.

    6.

    Step 4

    To begin removing the MAF sensor (located on the air box intake piping)
    Carefully unplug the sensor’s connector.

    6A.

    Step 5

    Using the TS25 torx 5 sided bit along with a ratchet, unscrew the two torx screws which hold the sensor in place

    7.

    Step 6
    Once the torx screws are removed, gently wiggle the sensor out.
    It is a very snug fit, be patient. No need to pry it out with anything.
    Be very careful here.
    Once removed, the MAF sensor looks like this

    8. 9.

    Step 7

    To clean the sensor, spray CRC air sensor cleaner generously on the component that looks like a diode.
    This is known as the IAT (INTAKE AIR TEMPERATURE sensor)
    Ensure the whole wire is cleaned as best as possible.
    DO NOT TOUCH THE COMPONENT and do not let the straw of the CRC cleaner touch it either.

    10.

    Step 8

    The next section to clean is the metal plate. Located in the pic below.
    Spray generously here too

    11.

    Step 9

    The last section to clean is the area located below.
    If you pear into this area you will see a metal fin of some sort. (this may be referred to as a hot wire)
    Spray generously here at the metal hot wire fins, but do not direct the straw of the CRC cleaner into the recess.

    12.

    Step 10

    Once all three areas are clean, do not re-fit.
    Leave to completely dry out.
    Whilst drying you can clean the airbox area where the MAF sensor goes.
    Check the aperture and ensure there is no debris or foreign matter inside.

    Step 11

    Once the MAF sensor is completely dried, place it back into its original position and repeat the removal process in reverse order.
    (READ NOTES BELOW BEFORE CONTINUING)


    Notes

    -There are no specified torque settings for the MAF screws so tighten those accordingly.
    -Once everything is re-installed, refit the negative terminal to the battery

    (ENSURE YOUR KEYS ARE NOT IN THE IGNITION WHEN THE TERMINAL IS RE-FITTED)

    -Start the engine and let it idle for approx 5 mins (ECU relearns all air pressure and flow readings), after 5 mins turn the ignition off, then re-start and let is idle for another couple mins.

    (Note: There may be other ECU reset procedures, use the procedure your most familiar with)

    Double check all the bolts for the engine insulator cover are tight and check the MAF connector is fully secure

    Take the car on a test drive and ensure no fault lights are illuminated


    Accord_n22
    27-03-2016
    Version: 1.0

    --------------------------- END OF PROCEDURE ---------------------------
    wahabishtiaq, Nels and Ichiban like this.

Recent Reviews

  1. wahabishtiaq
    wahabishtiaq
    5/5,
    awesome! will give it a go...
    1. Accord_N22
      Author's Response
      Really straight forward. Just make sure you use the CRC cleaner and have the torx bit to hand :)
  2. Nels
    Nels
    5/5,
    Great guide. Well done
    1. Accord_N22
      Author's Response
      Cheers nels :)
  3. Ichiban
    Ichiban
    5/5,
    Brill guide mate.
    1. Accord_N22
      Author's Response
      Thanks ichiban, Let me know if there are any errors or mistakes :)